Amada 301H/115V User manual

990-115 REV Q
ELECTRONIC WELD HEAD CONTROL
300 Series
OPERATION MANUAL

SERIES 300 FAST RESPONSE WELD HEAD SYSTEM
ii 990-115
Copyright © 1990, 2002, 2007, 2013-2017 Amada Miyachi America
The engineering designs, drawings and data contained herein are the proprietary work of
AMADA MIYACHI AMERICA and may not be reproduced, copied, exhibited or otherwise
used without the written authorization of AMADA MIYACHI AMERICA.
Printed in the United States of America
Revision Record
Revision EO Date Basis of Revision
A None – None. Original edition
B 17189 10/97 Update per 995-115, Rev B
C 17300 01/98 Correct output relay contact specifications
D 17449 05/98 Bind in Addendum 995-115, Rev A
E 17528 06/98 Change equipment part numbers
F 17452 07/98 Incorporate the information in Addendum 995-115, Revs A & B
G 19146 01/02
Change name to Unitek Peco™ .
Add 302H Models.
Reformat manual.
H 19638 01/03 Add Force accuracy data.
J 21554 08/07
Change to Miyachi Unitek corporate name. Updated Technical
Information.
K 42860 11/13 Updated to Miyachi America name and logo.
L 43105 07/14 References to Datacom Software Removed.
M 43481 11/14 Updated to Amada Miyachi America logo and name.
N 43838 08/15 Updated to Amada Miyachi America format.
P 44255 05/16 Update contact information
Q 44457 05/17 Update illustrations

SERIES 300 FAST RESPONSE WELD HEAD SYSTEM
990-115 iii
FOREWORD
Thank you for purchasing a Miyachi Unitek Series 300 Fast Response Weld Head System.
Upon receipt of your equipment, please thoroughly inspect it for shipping damage prior to its
installation. Should there be any damage, please immediately contact the shipping company to file a
claim, and notify us at:
Amada Miyachi America
1820 South Myrtle Avenue
Monrovia, California 91016
Phone: [phone]
FAX: [phone]
E-mail: [email protected]
The purpose of this manual is to supply operating and maintenance personnel with the information
needed to properly and safely operate and maintain the Series 300 Fast Response Weld Head System.
We have made every effort to ensure that the information in this manual is accurate and adequate.
Should questions arise, or if you have suggestions for improvement of this manual, please contact us at
the above location/numbers.
Amada Miyachi America is not responsible for any loss due to improper use of this product.

SERIES 300 FAST RESPONSE WELD HEAD SYSTEM
iv 990-115
SAFETY NOTES
This instruction manual describes how to operate, maintain and service the Series 300 Fast Response
Weld Head System, and provides instructions relating to its SAFE use. Procedures described in this
manual MUST be performed, as detailed, by QUALIFIED and TRAINED personnel.
For SAFETY, and to effectively take advantage of the full capabilities of the tester, please read these
instruction manuals before attempting to use the workstation.
Procedures other than those described in this manual or not performed as prescribed in it, may expose
personnel to electrical hazards.
After reading this manual, retain it for future reference when any questions arise regarding the proper
and SAFE operation of the tester.
Please note the following conventions used in this manual:
WARNING: Comments marked this way warn the reader of actions which, if not followed, might
result in immediate death or serious injury.
CAUTION: Comments marked this way warn the reader of actions which, if not followed, might result
in either damage to the equipment, or injury to the individual if subject to long-term exposure to the
indicated hazard.

SERIES 300 FAST RESPONSE WELD HEAD SYSTEM
990-115 v
CONTENTS
Page
Chapter 1: Description
Section I. Features ..................................................................................................................................1-1
Overview ..........................................................................................................................................1-1
Performance Features ......................................................................................................................1-1
Programmable Follow-Up Force .............................................................................................. 1-1
Weld-to-Displacement ..............................................................................................................1-2
Weld Head Dynamics ...............................................................................................................1-2
Other Important Features ..........................................................................................................1-2
Section II. Components ..........................................................................................................................1-3
Equipment Description ....................................................................................................................1-3
System Controls ...............................................................................................................................1-5
Data Keypad .............................................................................................................................1-5
Control Keypad ........................................................................................................................1-6
Select Keypad ...........................................................................................................................1-6
WELD/NO WELD Switch (Power Supply) ...................................................................... 1-6
RUN/DRESS Switch (Weld Head Control) ......................................................................1-6
Chapter 2: Getting Started
Section I. Planning for Installation ........................................................................................................2-1
Space Requirements .........................................................................................................................2-1
Series 300 Installation Dimensions .................................................................................................2-1
Linear Actuator Installation ............................................................................................................. 2-2
Basic Installation ......................................................................................................................2-2
Optional L-Stand Installation ...................................................................................................2-3
Section II. Power Supply Connections ..................................................................................................2-4
Power Line Voltage, Current and Wire Size Requirements ............................................................ 2-4
Connector Functions ........................................................................................................................2-4
Welding Transformer to Weld Head Connections ..........................................................................2-4
Power Supply and Foot Switch to Weld Head Control Connections ..............................................2-5
Section III. Making the First Weld ........................................................................................................2-6
Nomenclature and Symbols ......................................................................................................2-6
Electrode Installation ................................................................................................................2-6
Weld Head Control Power Up and Initialization .....................................................................2-6
Setting the Upstop and Search Positions ...........................................................................2-7
Power Supply Power Up and Initialization .......................................................................2-9
Making Test Welds with Round-to-Round or Round-to-Flat Stock ......................................2-10
Making Test Welds with Flat-to-Flat Stock ...........................................................................2-13

SERIES 300 FAST RESPONSE WELD HEAD SYSTEM
vi 990-115
Page
Chapter 3: Operating Instructions
Overview of the Series 300 (Metric) Weld Head Operation ..................................................................3-1
The HELP Screens ...........................................................................................................................3-3
A Closer Look at the PROGRAM Screens ......................................................................................3-3
Alphanumeric PROGRAM Screen ...........................................................................................3-4
UPST Position PROGRAM Screen ..........................................................................................3-4
SRCH Position PROGRAM Screen .........................................................................................3-4
Graphical Force PROGRAM Screen ........................................................................................3-5
Setdown PROGRAM Screen ...................................................................................................3-5
A Closer Look at the RUN Screens .................................................................................................3-5
Alphanumeric RUN Screen ......................................................................................................3-6
Graphical Force RUN Screen ...................................................................................................3-6
Graphical Setdown RUN Screen ..............................................................................................3-8
The MAIN MENU Screen ...............................................................................................................3-9
TheOPTIONS Selection ......................................................................................................3-9
TheWELD COUNTER Selection ......................................................................................3-13
TheCOPY a SCHEDULE Selection ..................................................................................3-13
TheSYSTEM SECURITY Selection .................................................................................3-14
TheSYSTEM HELP Selection .......................................................................................... 3-15
TheCALIBRATION Selection ..........................................................................................3-15
TheRESET to DEFAULTS Selection ............................................................................... 3-16
TheINSTALLATION Selection ........................................................................................3-17
The Weld-to-Displacement Feature ...............................................................................................3-18
The Importance of Follow-Up Force .............................................................................................3-20
Chapter 4: Maintenance
Section I. Service Precautions ................................................................................................................4-1
General Operator Safety ..................................................................................................................4-1
Section II. Operation Troubleshooting ..................................................................................................4-1
General Kinds of Problems ..............................................................................................................4-1
Section III. Operator Service Procedures ...............................................................................................4-4
Electrode Maintenance ....................................................................................................................4-4
Section IV. Repair Service .....................................................................................................................4-5
Parts Replacement ...........................................................................................................................4-5
Technical Assistance .......................................................................................................................4-5

SERIES 300 FAST RESPONSE WELD HEAD SYSTEM
990-115 vii
CONTENTS (Continued) Page
Section V. Calibration ............................................................................................................................4-6
Series 300 Weld Head System with the 350C Weld Head Control Applicable Models .................4-6
Equipment Required ........................................................................................................................4-6
Preliminary Setup ............................................................................................................................4-6
Procedure .........................................................................................................................................4-6
Appendix A: Technical Specifications ............................................................................................... A-1
Appendix B: Weld Head Control Input / Output Signals .................................................................B-1
Appendix C: Weld Head Dynamics ....................................................................................................C-1
Appendix D: RS-232 Serial Communications .................................................................................. D-1
Index .....................................................................................................................................Index-1

SERIES 300 FAST RESPONSE WELD HEAD SYSTEM
viii 990-115

SERIES 300 FAST RESPONSE WELD HEAD SYSTEM
990-115 ix
LIMITED WARRANTY
1. (a) Subject to the exceptions and upon the conditions set forth herein, Seller warrants to Buyer that
for a period of one (1) year from the date of shipment (“Warranty Period”), that such Goods will be free
from material defects in material and workmanship.
(b) Notwithstanding the foregoing and anything herein to the contrary, the warranty set forth in this
Section 1 shall be superseded and replaced in its entirety with the warranty set forth on Exhibit A
hereto if the Goods being purchased are specialty products, which include, without limitation, laser
products, fiber markers, custom systems, workstations, Seller-installed products, non-catalogue
products and other custom-made items (each a “Specialty Products.”
(c) EXCEPT FOR THE WARRANTY SET FORTH IN SECTION 1(A), SELLER MAKES NO
WARRANTY WHATSOEVER WITH RESPECT TO THE GOODS (INCLUDING ANY SOFTWARE) OR
SERVICES, INCLUDING ANY (a) WARRANTY OF MERCHANTABILITY; (b) WARRANTY OF
FITNESS FOR A PARTICULAR PURPOSE; (c) WARRANTY OF TITLE; OR (d) WARRANTY
AGAINST INFRINGEMENT OF INTELLECTUAL PROPERTY RIGHTS OF A THIRD PARTY;
WHETHER EXPRESS OR IMPLIED BY LAW, COURSE OF DEALING, COURSE OF
PERFORMANCE, USAGE OF TRADE OR OTHERWISE.
(d) Products manufactured by a third party and third party software (“Third Party Product”) may
constitute, contain, be contained in, incorporated into, attached to or packaged together with, the
Goods. Third Party Products are not covered by the warranty in Section 1(a). For the avoidance of
doubt, SELLER MAKES NO REPRESENTATIONS OR WARRANTIES WITH RESPECT TO ANY
THIRD PARTY PRODUCT, INCLUDING ANY (a) WARRANTY OF MERCHANTABILITY; (b)
WARRANTY OF FITNESS FOR A PARTICULAR PURPOSE; (c) WARRANTY OF TITLE; OR (d)
WARRANTY AGAINST INFRINGEMENT OF INTELLECTUAL PROPERTY RIGHTS OF A THIRD
PARTY; WHETHER EXPRESS OR IMPLIED BY LAW, COURSE OF DEALING, COURSE OF
PERFORMANCE, USAGE OF TRADE OR OTHERWISE. Notwithstanding the foregoing, in the event
of the failure of any Third Party Product, Seller will assist (within reason) Buyer (at Buyer’s sole
expense) in obtaining, from the respective third party, any (if any) adjustment that is available under
such third party’s warranty.
(e) Seller shall not be liable for a breach of the warranty set forth in Section 1(a) unless: (i) Buyer gives
written notice of the defect, reasonably described, to Seller within five (5) days of the time when Buyer
discovers or ought to have discovered the defect and such notice is received by Seller during the
Warranty Period; (ii) Seller is given a reasonable opportunity after receiving the notice to examine such
Goods; (iii) Buyer (if requested to do so by Seller) returns such Goods (prepaid and insured to Seller at
1820 South Myrtle Avenue, Monrovia, CA 91016or to such other location as designated in writing by
Seller) to Seller pursuant to Seller’s RMA procedures and Buyer obtains a RMA number from Seller
prior to returning such Goods for the examination to take place; and (iii) Seller reasonably verifies
Buyer’s claim that the Goods are defective and that the defect developed under normal and proper use.
(f) Seller shall not be liable for a breach of the warranty set forth in Section 1(a) if: (i) Buyer makes any
further use of such Goods after giving such notice; (ii) the defect arises because Buyer failed to follow
Seller’s oral or written instructions as to the storage, installation, commissioning, use or maintenance of
the Goods; (iii) Buyer alters or repairs such Goods without the prior written consent of Seller; or (iv)
repairs or modifications are made by persons other than Seller’s own service personnel, or an
authorized representative’s personnel, unless such repairs are made with the written consent of Seller
in accordance with procedures outlined by Seller.

SERIES 300 FAST RESPONSE WELD HEAD SYSTEM
x 990-115
(g) All expendables such as electrodes are warranted only for defect in material and workmanship
which are apparent upon receipt by Buyer. The foregoing warranty is negated after the initial use.
(h) Subject to Section 1(e) and Section 1(f) above, with respect to any such Goods during the Warranty
Period, Seller shall, in its sole discretion, either: (i) repair or replace such Goods (or the defective part)
or (ii) credit or refund the price of such Goods at the pro rata contract rate, provided that, if Seller so
requests, Buyer shall, at Buyer’s expense, return such Goods to Seller.
(i) THE REMEDIES SET FORTH IN SECTION 1(H) SHALL BE BUYER’S SOLE AND EXCLUSIVE
REMEDY AND SELLER’S ENTIRE LIABILITY FOR ANY BREACH OF THE LIMITED WARRANTY
SET FORTH IN SECTION 1(A). Representations and warranties made by any person, including
representatives of Seller, which are inconsistent or in conflict with the terms of this warranty, as set
forth above, shall not be binding upon Seller.

SERIES 300 FAST RESPONSE WELD HEAD SYSTEM
990-115 xi
Exhibit A
Warranty for “Specialty Products”
Limited Warranty
EXCEPT FOR THE WARRANTY SET FORTH BELOW IN THIS EXHIBIT A, SELLER MAKES NO
WARRANTY WHATSOEVER WITH RESPECT TO THE GOODS (INCLUDING ANY SOFTWARE) OR
SERVICES, INCLUDING ANY (a) WARRANTY OF MERCHANTABILITY; (b) WARRANTY OF
FITNESS FOR A PARTICULAR PURPOSE; (c) WARRANTY OF TITLE; OR (d) WARRANTY
AGAINST INFRINGEMENT OF INTELLECTUAL PROPERTY RIGHTS OF A THIRD PARTY;
WHETHER EXPRESS OR IMPLIED BY LAW, COURSE OF DEALING, COURSE OF
PERFORMANCE, USAGE OF TRADE OR OTHERWISE.
Warranty Period: The Warranty Period for Specialty Products is for one (1) year, and the Warranty
Period for laser welders and laser markers is two (2) years (unlimited hours), and the Warranty Period
for the laser pump diodes or modules is two (2) years or 10,000 clock hours, whichever occurs first (as
applicable, the “Warranty Period”). The Warranty Period begins as follows: (i) on orders for Goods
purchased directly by Buyer, upon installation at Buyer’s site or thirty (30) days after the date of
shipment, whichever occurs first; or (ii) on equipment purchased by a Buyer that is an OEM or systems
integrators, upon installation at the end user’s site or six (6) months after the date of shipment,
whichever occurs first.
Acceptance Tests: Acceptance Tests (when required) shall be conducted at Amada Miyachi
America, Inc., Monrovia, CA, USA (the “Testing Site”) unless otherwise mutually agreed in writing prior
to issuance or acceptance of the Acknowledgement. Acceptance Tests shall consist of a final visual
inspection and a functional test of all laser, workstation, enclosure, motion and accessory hardware.
Acceptance Tests shall include electrical, mechanical, optical, beam delivery, and software items
deliverable under the terms of the Acknowledgement. Terms and conditions for Additional Acceptance
Tests either at Seller’s or Buyer’s facility shall be mutually agreed in writing prior to issuance or
acceptance of the Acknowledgement.
Performance Warranty: The system is warranted to pass the identical performance criteria at Buyer’s
site as demonstrated during final Acceptance Testing at the Testing Site during the Warranty Period, as
provided in the Acknowledgement. Seller explicitly disclaims any responsibility for the process results
of the laser processing (welding, marking, drilling, cutting, etc.) operations.
Exclusions: Seller makes no warranty, express or implied, with respect to the design or operation of
any system in which any Seller’s product sold hereunder is a component.
Limitations: The limited warranty set forth on this Exhibit A does not cover loss, damage, or defects
resulting from transportation to Buyer’s facility, improper or inadequate maintenance by Buyer, Buyer-
supplied software or interfacing, unauthorized modification or misuse, operation outside of the
environmental specifications for the equipment, or improper site preparation and maintenance. This
warranty also does not cover damage from misuse, accident, fire or other casualties of failures caused
by modifications to any part of the equipment or unauthorized entry to those portions of the laser which
are stated. Furthermore, Seller shall not be liable for a breach of the warranty set forth in this Exhibit A
if: (i) Buyer makes any further use of such Goods after giving such notice; (ii) the defect arises because
Buyer failed to follow Seller’s oral or written instructions as to the storage, installation, commissioning,
use or maintenance of the Goods; (iii) Buyer alters or repairs such Goods without the prior written
consent of Seller; or (iv) repairs or modifications are made by persons other than Seller’s own service
personnel, or an authorized representative’s personnel, unless such repairs are made with the written
consent of Seller in accordance with procedures outlined by Seller.

SERIES 300 FAST RESPONSE WELD HEAD SYSTEM
xii 990-115
Seller further warrants that all Services performed by Seller’s employees will be performed in a good
and workmanlike manner. Seller’s sole liability under the foregoing warranty is limited to the obligation
to re-perform, at Seller’s cost, any such Services not so performed, within a reasonable amount of time
following receipt of written notice from Buyer of such breach, provided that Buyer must inform Seller of
any such breach within ten (10) days of the date of performance of such Services.
Seller shall not be liable for a breach of the warranty set forth in this Exhibit A unless: (i) Buyer gives
written notice of the defect or non-compliance covered by the warranty, reasonably described, to Seller
within five (5) days of the time when Buyer discovers or ought to have discovered the defect or non-
compliance and such notice is received by Seller during the Warranty Period; (ii) Seller is given a
reasonable opportunity after receiving the notice to examine such Goods and (a) Buyer returns such
Goods to Seller’s place of business at Buyer’s cost (prepaid and insured); or (b) in the case of custom
systems, Seller dispatches a field service provider to Buyer’s location at Buyer’s expense, for the
examination to take place there; and (iii) Seller reasonably verifies Buyer’s claim that the Goods are
defective or non-compliant and the defect or non-compliance developed under normal and proper use.
All consumable, optical fibers, and expendables such as electrodes are warranted only for defect in
material and workmanship which are apparent upon receipt by Buyer. The foregoing warranty is
negated after the initial use.
No warranty made hereunder shall extend to any product whose serial number is altered, defaced, or
removed.
Remedies: With respect to any such Goods during the Warranty Period, Seller shall, in its sole
discretion, either: repair such Goods (or the defective part). THE REMEDIES SET FORTH IN THE
FOREGOING SENTENCE SHALL BE BUYER’S SOLE AND EXCLUSIVE REMEDY AND SELLER’S
ENTIRE LIABILITY FOR ANY BREACH OF THE LIMITED WARRANTY SET FORTH IN THIS
EXHIBIT A. Representations and warranties made by any person, including representatives of Seller,
which are inconsistent or in conflict with the terms of this warranty, as set forth above, shall not be
binding upon Seller.
Products manufactured by a third party and third party software (“Third Party Product”) may
constitute, contain, be contained in, incorporated into, attached to or packaged together with, the
Goods. Third Party Products are not covered by the warranty in this Exhibit A. For the avoidance of
doubt, SELLER MAKES NO REPRESENTATIONS OR WARRANTIES WITH RESPECT TO ANY
THIRD PARTY PRODUCT, INCLUDING ANY (a) WARRANTY OF MERCHANTABILITY; (b)
WARRANTY OF FITNESS FOR A PARTICULAR PURPOSE; (c) WARRANTY OF TITLE; OR (d)
WARRANTY AGAINST INFRINGEMENT OF INTELLECTUAL PROPERTY RIGHTS OF A THIRD
PARTY; WHETHER EXPRESS OR IMPLIED BY LAW, COURSE OF DEALING, COURSE OF
PERFORMANCE, USAGE OF TRADE OR OTHERWISE. Notwithstanding the foregoing, in the event
of the failure of any Third Party Product, Seller will assist (within reason) Buyer (at Buyer’s sole
expense) in obtaining, from the respective third party, any (if any) adjustment that is available under
such third party’s warranty.

SERIES 300 FAST RESPONSE WELD HEAD SYSTEM
990-115 1-1
CHAPTER 1
DESCRIPTION
Section I: Features
Overview
The Series 300 Fast Response Weld Head System is designed for any bench-top, semi or fully automated
resistance welding applications. It provides programmable, highly-controlled weld force and extremely fast
follow-up response required by precision resistance welding applications. The system consists of either an
on-line or offset weld head, called the Actuator, and a control. An optional stand assembly is also available.
This manual covers the following models:
Model Stock No.
301H/115V 2-301-XX
301H/100V 2-301-XX-01
301H/230V 2-301-XX-02
301H/208V 2-301-XX-03
302H/115V 2-302-XX
302H/100V 2-302-XX-01
302H/230V 2-302-XX-02
302H/208V 2-302-XX-03
For the rest of this manual any of the Linear Actuator Modules will simply be referred to as the Actuator,
and any model Electronic Weld Head Control will simply be referred to as the Control, unless unique
descriptions for specific models are required.
Performance Features
Through two unique features – programmable follow-up force and weld-to-displacement – the Weld Head
System solves critical problems in conventional pneumatic or cam-driven welding systems.
Programmable Follow-Up Force
Through programmable follow-up force, the Weld Head System is able to quickly and repeatedly position
the electrode during the molten or plastic phase of the welding process. This unique feature prevents
workpiece expulsion during the welding operation. Maximum strength welds result, and previously
difficult-to-weld material combinations, such as tungsten wire to tungsten wire and tungsten wire to
molybdenum foil, are easily made. Furthermore, due to the absence of sparking, electrode life is
dramatically increased.

CHAPTER 1: DESCRIPTION
SERIES 300 FAST RESPONSE WELD HEAD SYSTEM
1-2 990-115
Weld-to-Displacement
This feature ensures consistent nugget size by regulating the energy cutoff point of the power supply,
thus controlling the amount of material collapse or set-down.
Weld Head Dynamics
The dynamics of the Actuator during the weld operation are detailed in Appendix C. The information
will be useful in installing, setting up and operating the Weld Head System.
Other Important Features
Other important performance features of the Weld Head System are:
Precise measurement of setdown displacement for each weld provides an indication of weld
quality.
Weld-to-displacement feature shuts off the power supply when a programmed setdown
displacement is reached.
Over force and “hammering” are eliminated, even at high weld repetition rates.
Real time graphical display of programmed and actual weld force and setdown displacement for
each weld.
Storage of up to 128 welding schedules allows rapid setups for applications that require different
force and setdown control.
Unique electrode dress mode that minimizes electrode maintenance down time.

CHAPTER 1: DESCRIPTION
SERIES 300 FAST RESPONSE WELD HEAD SYSTEM
990-115 1-3
Section II: Components
Equipment Description
The Series 300 Fast Response Weld Head System consists of either the Model 301H or 302H Linear
Actuator Module (figure 1-1) and the Model 350C Electronic Weld Head Control (figure 1-2). The Model
301H Actuator (shown) has an in-line electrode. The Model 302H Actuator has an offset electrode.
Additional equipment required but not supplied includes the appropriate welding transformer model, high-
frequency resistance welding power supply, and a two-level foot switch. The system equipment is listed in
table 1-1. In addition, an MK301 (in-line) or MK302 (off set) stand is available for mounting the Actuator
Figure 1-1. Model
301H Linear Actuator
Module (Typical)
Figure 1-2. Model 350C Electronic Weld
Head Control
NOTE: For clarity of communication throughout this manual, it is assumed you are using the HF2 Welding
Transformer, HF2 Power Supply (with appropriate transformer), HF25 Power Supply, or UB25 Power
Supply, and the FS2L Foot Switch with your Weld Head System. If you are using equivalent equipment,
please refer to the manufacturer’s manuals for information about that equipment.

CHAPTER 1: DESCRIPTION
SERIES 300 FAST RESPONSE WELD HEAD SYSTEM
1-4 990-115
Table 1-1. Series 300 System Equipment List
Equipment Amada Miyachi
America Part
Number Application Notes
Model 301H Linear
Actuator 4-34858-01 In-line welding
Only one weld head provided
with system, depending on
which is ordered.
Model 302H Linear
Actuator 4-34857-01 Offset welding
Model 350C Electronic
Weld Head Control 4-34831-01
Other Required Items (Not Supplied)
Welding Power Supply Model HF2 (with transformer),
HF25, UB25, or equivalent.
Two-level Foot Switch Equivalent to
Miyachi Unitek
Model 4-28945-01 Equivalent to Miyachi Unitek
Model FS2L
Optional Items
Weld Head Stand 4-34165-01 In-line weld head
(Model 301H)
Weld Head Stand 4-33713-01 Offset weld head
(Model 302H)
The Linear Actuator Module (Weld Head) is electro-magnetically controlled by the Weld Head Control
according to the travel and force profile program that you select. Through the program, electrode position
can be controlled to within 0.001 in. (25μm) but measured to within 0.0001 in (2.5μm). The weld force and
duration can be set to between 1 lb (0.45 kg) and 20 lbs (9 kg) at a 15% duty cycle.
Depending on the travel and force profile that you select, weld rate can be as high as four per second with
no impact force on the weld parts.
The Weld Head Control will interface with any programmable power supply that will initiate weld energy
through a dry-contact closure. However, the Weld Head Control is particularly effective when used with a
power supply that can be programmed to turn on weld energy in 1 millisecond increments.
Communication with external, user-supplied equipment is handled by the Weld Head Control through a
control signal input port, control signal output port, and a serial port for RS-485 data communications. The
addressable RS-485 serial port permits on-line logging of weld dynamics data and alarm conditions on your
data logger or PC. An accessories port is present for future communications needs.

CHAPTER 1: DESCRIPTION
SERIES 300 FAST RESPONSE WELD HEAD SYSTEM
990-115 1-5
System Controls
The front control panel of the 350C Weld Head Control is illustrated in figure 1-3. The only other system
controls are the POWER switch on the rear panel of the Weld Head Control, and the power circuit breaker
on the power supply.
Figure 1-3. Weld Head Control Front Panel Controls
The eight-line liquid crystal displays provide essentially the same functions on the Weld Head Control and
the Power Supply. Alphanumeric screens allow you to program up to 128 different weld force profiles and
monitor alarm conditions. Graphic screens allow you to fine-tune the time, follow-up force and weld energy
relationships. Additionally, on-line help screens allow you to interrogate the system for quick look-up
information about installation and operation issues.
NOTE: The functions of the key clusters on the HF2 Power Supply and the Weld Head Control are
identical. So, the following descriptions of the key clusters apply to them both. The HF25 and UB25 Power
Supplies are slightly different; you should refer to the user manual for your power supply.
Data Keypad
This cluster of twelve numerical keys enters numerical
information. Use the keys to enter values directly to the screens
instead of incrementally with the keys. Use [.] to key in
decimal values. Press [ENTER] after keying in data to complete
the entry.

CHAPTER 1: DESCRIPTION
SERIES 300 FAST RESPONSE WELD HEAD SYSTEM
1-6 990-115
Control Keypad
This cluster of six keys allows you to access the various control screens on the
display and control the editing (changing) of data on the screens.
[MENU] Provides a screen (display) menu listing of user options that are
common to all weld schedules.
[PROG] Each time you press [PROG], it accesses the next programming
screen in a sequence of programming screens. It also disables the RUN state.
[RUN] Pressing [RUN] exits the PROGRAM state (the state in which the Weld Head Control is to be
programmed) or the MENU (user options) state, and enters the RUN state. In the RUN state, you can
view the screens while you make a weld and analyze weld force, weld current, and electrode position
(follow-up) relationships dynamically.
[CHNG] Pressing [CHNG] allows you to either:
Select different screen menu options, or
Restore the previous contents of a screen programmable field, or
Toggle through the series of screen of the RUN state.
[HELP] Accesses detailed on-line help screens for any program variables or alarm messages. The
screens provide helpful information about any menu option or flashing programmable field. Pressing
[HELP] A second time returns you to the original screen state.
[SAVE] This key is active only in the PROGRAM state. Pressing [SAVE] saves the changes to the
weld schedule that you just entered to the program screen, then automatically selects the RUN state.
Select Keypad
This is a cluster of four arrow keys. In the RUN state, you actuate them
to increment or decrement weld schedules. In the alphanumeric
PROGRAM or MENU states, you actuate them to move the cursor up,
down and sideways on the screens to select value field for editing. In the
graphical PROGRAM state, you can increment or decrement programmed
values.
WELD/NO WELD Switch (Power Supply). Placing this switch in the NO WELD position cuts
off weld current. It is the position that is required to adjust the weld head. Note that a complete
electrode positioning sequence can be executed without weld current flowing. You must place the
switch in the WELD position to make a weld.
RUN/DRESS Switch (Weld Head Control). Placing this switch in the RUN position allows
normal execution of the weld cycle. In the DRESS position, it allows you to dress (clean) the
electrodes by executing a setdown on cleaning material that you insert between the electrodes.
Setdown force for dressing is programmable.

SERIES 300 FAST RESPONSE WELD HEAD SYSTEM
990-115 2-1
CHAPTER 2
GETTING STARTED
Section I: Planning for Installation
Space Requirements
We recommend that you install the Series 300 Fast Response Weld Head System in a well-ventilated area
that is free from excessive dirt and moisture. Allow sufficient clearance around both sides and back of the
350C Electronics Weld Head Control, the welding power supply, and the welding transformer so that
cooling air can flow properly.
Series 300 Installation Dimensions
The dimensions and weight for a complete welding system are listed in table 2-1.
Table 2-1. System Installation Dimensions
Equipment Width
(in/cm)
Height
(in/cm)
Depth
(in/cm)
Weight
(lbs/kg)
350C Weld Head Control 10.5/26.7 8.5/21.6 15.1/38.4 68.0/30.8
301H/302H Linear Actuator Module
(Weld Head) 2.0/5.1 10.4/26.4 4.0/10.2 13.0/5.9
Weld Head Stand (optional) 2.4/6.0 20.5/52.0 10.2/26.0 8.2/3.7

CHAPTER 2: GETTING STARTED
SERIES 300 FAST RESPONSE WELD HEAD SYSTEM
2-2 990-115
Linear Actuator Installation
All units of the Series 300 System are stand-alone except the Linear Actuator (weld head), which must be
mounted on a stable, vibration-proof work surface. If you purchase the optional L-Stand Assembly, which
provides a flexible method of installing the actuator for non-automated applications, refer to that specific
paragraph, below.
Basic Installation
NOTE: The Linear Actuator has
three sets of mounting holes, with
identical hole patterns, so the unit
can be mounted on its back or
either side. An optional adapter
plate (P/N 4-33273-01) is available
from Amada Miyachi America and
is already included in the optional
L-Stand Assembly.
Referring to figure 2-1 and the
Installation Drawing (included in
the Ship Kit), perform the
following steps.
1Secure the actuator to an
adapter plate with four 1/4-20
screws. If you are using the
above-mentioned adapter plate,
these should be 1/4-20 x 3/4"
flat head Phillips screws (P/N
625-595).
2Secure the adapter plate to a
vertical mounting surface
using two machine bolts and
flat washers. The height of the
upper electrode holder above
the lower electrode holder (to
be installed in step 3) should
allow for no more than 1.06 in.
(27mm) of upper electrode travel.
3Secure the lower electrode holder (user furnished, but included in the optional L-Stand Assembly) to
the horizontal work surface, in alignment with the upper electrode holder. The misalignment
between the upper and lower electrode center lines should be less than 10% of the smallest electrode
diameter or width dimensions.
Adapter plate
M8-1.25 x 25mm bolt (P/N 160-047)
and 5/16 flat washer (P/N 755-044) (2Pl)
1/4-20 x 3/4 flat head Phillips
screw (P/N 625-595) (4Pl)
Upper electrode holder
Figure 2-1. Typical Linear Actuator Installation
(Using P/N 4-33273-01 Adapter Plate)