Acer Dynamic 3370X User manual

1
ACER
HEAVY DUTY PRECISON
ENGINE LATHE
Model: Dynamic 3370X~33330X
Dynamic 3770X~37330X
Dynamic 4170X~41330X
OPERATION MANUAL
& PART LISTS
Taiwan: Ya-Gin Machine Tool Manufacturing Inc.
Ya-Wei Machine Tool Manufacturing Inc.
No. 101, 506 Lane, Seng-Tso Road
Seng Karng District, Taichung City, Taiwan
Tel: [phone] Fax: [phone]
CA: Springwood Industrial, Inc.
2320 E. Valencia Drive, Fullerton, CA 92831 USA
Tel: [phone] Fax: [phone]
NJ: Klim Industrial, Inc.
244 N. Randolphville Rd, Piscataway, NJ 08854 USA
Tel: [phone] Fax: [phone]
Revised: 1/14/20

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CONTENTS PREFACE
1. Machine Assembly
2. ELECTRICAL CIRCUIT
CONTROL
2-1 Electrical Wiring
2-2 Electrical Equipment
2-3 Electrical Cautions
2-4 Circuit Diagram
2-5 Operation Symbols
3. UNPACKING & MACHINE
INSTALLATION
3-1 Unpacking & Lifting
3-2 Basic Foundation
4. MAJOR CONSTRUCTION
4-1 Headstock
4-2 Spindle
4-3 Spindle Speed Selection
4-4 Carriage Slide
4-5 Tailstock
4-6 Apron
4-7 Gear Box
4-8 Thread Chasing Dial
4-9 Steady Rest
4-10 Brake System
5. LUBRICATION
5-1 Headstock Lubrication
5-2 Gear Box & Apron Lubrication
5-3 Lubrication Charts
5-4 Lubrication Location

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CONTENTS 6. MAINTENANCE & ADJUSTMENT
6-1 Headstock
6-2 Apron & Saddle
6-3 Gear Box
6-4 Belt Tension Adjustment
6-5 Brake Belt Adjustment
6-6 Brake & Micro Switch Adjustment
6-7 Cutting Coolant Repair
7. MECHANICAL PART LISTS
7-1 Headstock Assembly
7-2 Gear Box Assembly
7-3 Gear Box Cover Assembly
7-4 Apron Assembly
7-5 Machine Bed and Base Assembly
7-6 Brake System
7-7 Carriage and Crossfeed System
7-8 Tailstock
7-9 Chip Guard
7-10 Leadscrew Cover and Rear Splash
Guard

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PREFACE
Thank you for purchasing our lathe to be your production machine. Before
operating the lathe, it is necessary to study our manual. If user can operate correctly,
the machine is efficient and easy-to-operate.
This manual consists of 7 chapters, mainly including operation, maintenance and
list of spare parts. Please read the manual thoroughly from the first page to the last in
order to be familiar with this machine to work efficiently and effortlessly. Besides,
based on safety consideration, the operator must be well trained according to all the
instructions in the manual. Any damage of the machine and injury on the worker
caused by improper operation and disregard of our instruction is not covered under
warranty.
In addition to the instructions listed in our manual, there are some matters needing
attention as well:
1. Do not expose the machine to outdoors in order to avoid any damage caused by the
weather and must keep the machine away from cooling wind.
2. Lubricate the machine with recommended or specified lubricant or grease.
3. Remove chips frequently to keep the machine clean, this will make the machine
last longer.
4. If machine’s bed way is dented, please do not move the carriage until the bed way
is repaired.
If you have any question, please do not hesitate to contact your local
distributor!

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1.
Machine Assembly

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Fig. 1-1
ITEM DESCRIPTION ITEM DESCRIPTION
1 Forward/Reverse Shifting lever 19 4 steps feed selection dial
2 Spindle speed shifting selection lever 20 Spindle speed W OR M shifting lever
3 Spindle speed H/M/N/L shifting lever 21 Coolant control switch
4 Thread dial indicator 22 Power indicator
5 Cross feeding Handle 23 Main power on/off switch
6 4 way tool post 24 Emergency stop
7 Compound rest 25 Jog button
8 Compound rest handle 26 Half nut engaged lever
9 Tailstock body 27 Longitudinal feed hand wheel
10 Tailstock set over adjusting Screw 28 Auto feeding engaged lever
11 Tailstock body clamping screw 29 Apron hand-wheel
12 Tailstock spindle locking lever 30 Foundation adjusting bolt
13 Spindle speed shifting lever 31 Foot brake pedal
14 Tailstock hand wheel 32 Lead screw
15 Spindle speed A.B shifting lever 33 Auto-feed rod
16 MP & DP thread operate lever 34 Auto feed stop selection rod
17 9 steps feed selection dial 35 Adjustable tripping stop
18 Spindle speed C OR D shifting lever

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2.
ELECTRICAL CIRCUIT CONTROL
2-1 Electrical Wiring
1. The electrical control cabinet is located at the back side of headstock. Opening the
cabinet cover and connect the power source wires to the terminals (R, S & T)
The wires between the power source and the terminals must have over sectional area of
21.2mm2for 230V (8.4 mm2for 480V on 30HP
spindle motor).
2. The main power switch between the machine
and the power source also should be equipped with
safety fuses. Also the machine must have a ground
wire.
Fig. 2-1
2-2 Electrical Equipment
1. The electrical cabinet is also equipped with overload circuit breakers and electric
magnetic contactors to protect motors from overload during excess heavy cutting.
2. The forward/reverse switch is connected with micro switch.
3. The foot brake is connected with micro switch. Stepping the footbrake is quicker
to stop the lathe than turning off the main power switch. The spindle can only
rotate again by resetting and operating the spindle operation control lever after
releasing the foot brake.
4. The spindle will rotate continuously as long as the jog button on the top of the
electrical control panel is pressed.

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2-3 Electrical Cautions
1. After wiring, check the rotation of the spindle of the spindle. Turn the main
power switch “ON” and make sure the spindle is safe to turn. Then push jog
button (T) momentarily. The correct direction of the spindle rotation is counter
clockwise. (looking from tailstock end and have a downward movement of the
spindle operation control lever.) Wrong direction of the rotation can be corrected
by interchanging any two of the three phase lines (R.S.T.) in the power source.
2. Checking each lubrication system’s oil level.
3. Checking each handle if it is function normally.
4. Checking belt tension adjustment to see if it is in good condition.
5. Read and understand each section of the lathe before operation.
6. When power indicator is “ON”, but spindle motor is not running. Overload
circuit breaker and electric magnetic contactor have act to protect motor from
overload, please reset the circuit breaker by press the reset toggle and lathe will
be able to operate again. (The electric wiring attached at chapter 2-4)

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2-4 Circuit Diagram

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2-5 Operation Symbols
1 HIGH High speed revolution 11
Variable adjustment (pressure)
Clockwise: pressure increase
Counterclockwise: pressure
decrease
2 LOW Low speed revolution 12 Electrical control cabinet
3 Forward revolution 13
THREADS
Imperial threads
4 N Neutral gear 14
mm
Metric threads
5 Reverse revolution 15
mm
Auto feeding rate per
revolution
6 Feeding 16 Coolant pump
7
T
Jog 17
GREEN
Power switch- ON
8 Cross feeding 18
RED
Power switch-OFF
9 Longitudinal feeding 19 OIL Oil inlet (hole)
10 Cone clutch

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3.
UNPACKING & MACHINE INSTALLATION
3-1 Unpacking & Lifting
When the machine has arrived, first, check if the wooden case is damaged or not,
secondly, open the case and inspect the machine for any damage or short supply of
accessories. If there is, please contact our company or insurance company
immediately in order to get the best solution or claim; otherwise our company or the
insurance company will not be in the position to compensate for the damage.
Please refer to below picture for machine unloading from the truck & moving:
The steps for lifting the lathes are:
(1) Clamp the bed way with a special made hanger and bars (through the base holes),
which consists of a clamp and an iron chain.
(2) Raise the lathe a little bit with crane, and then check if the lathe is balanced. If
not, move apron and cross slide back or forth to make sure the machine is
balanced.
(3) While the machine arrives at the location, put down the machine slowly to avoid
any damage of the machine caused by bumps or crash.
(4) For opening the electrical cabinet, the machine should be located at least 24”
(600mm) from building wall at back side of the electric cabinet.

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3–2 Basic Foundation
With the common usage of tungsten carbide cutting tools nowadays, heavy
cutting and higher spindle speed are preferred. This may cause the vibration easily. In
order to establish the best cutting condition it is necessary to build a sound & good
floor foundation.
Adjust the leveling by adjustable
screws and nut-locks and build the
angled screws within the
foundation concrete.
Model
A
BxN
C
Model
A
BxN
C
3370
1430
0
0
33210
965
1000x3
965
3390
965
0
965
33250
965
1000x4
965
33130
965
1000x1
965
33290
965
1000x5
965
33170
965
1000x2
965
33330
965
1000x6
965

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4.
MAJOR CONSTRUCTION
4-1 Headstock
1. With high tensile durable cast iron material, which can withstand the higher work
load, the internal gears are made of chrome molybdenum alloy steel, made after
carburizing, quenching treatment, and precision grinding, and will reduce friction,
noise and increase wear-resistant.
2. Spindle speed with 12 steps speed change, the device included circular speed
plate, three range shift lever, and the shift lever control reversed and forward.
Please only change the spindle speed after stopping the spindle. Otherwise the
gears will get damaged. And will resulting in noise and vibration on the lathe,
and reduction of the accuracy and its lifespan.

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4-2 Spindle
1. Entire spindle is built by forging, cutting and precision grinding.
2. Spindle has a design as a three-point supporting system, the front-end of two
ultra-precision taper roller bearings and back-end using a deep groove ball
bearing can withstand heavy load, heavy cutting and enable precision turning
purposes.
3. To adjust the two taper roller bearings’backlash, please loosen the set screws on
the adjust nuts first, and then turn the adjust nuts according to requirement.
Spindle structure

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4-3 Spindle Speed Selection
1. Operation of the spindle speed, please refer to spindle speed table ,
Select the speed range “L”,”M” or “H”. Example: To select 680 rpm, shift the
speed shifting lever to “H” position first, and then rotate the spindle speed
shifting selection lever to the position “680”.
2. In order to shift the speed levers easier, please press the jog button momentarily.

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4-4 Carriage Slide
1. Carriage slide is the saddle-shaped casting on the lathe’s bed ways, the main
structure are the saddle-shaped slide body, compound slide and the 4-way tool
post. Main function of carriage slide is for mounting compound slide and tool
holder, and then locking cutting tools for cross and longitudinal feed operation.
2. Cutting in the longitudinal feed
Cutting in the longitudinal feed, in order to avoid the carriage moving backward,
please lock tight screw clamp D, otherwise this turning action will result in an
uneven cutting surface.
3. Taper cutting
Cross carriage engraved with the angle-indicator, when doing taper cutting,
please loosen the locking screws B, and rotate the compound rest to the angle
you need, and then lock screws B tightly before cutting start.
4. Adjustment of the gibs
To avoid the gap caused by the long period wearing and tearing of sliding
surfaces, a gib for possible adjustments to eliminate the gap in each carriage; To
adjust, please loosen the end locking screw and tighten adjustment screw A first,
and then adjust the gib to maintain proper clearance, then retighten the screws.
5. Dial The dial moves forward 10mm per revolution, could be divided into 250,
0.04mm per graduation. When reset to zero, please loosen the screw then tighten
it after adjustment.

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4-5 Tailstock
1. The main structure of the tailstock: the tailstock body, tailstock base plate, the
tailstock sleeve, and speed control box. The tailstock sleeve and spindle are in
the same level center position, also support the longitudinal movement on the
bed and the spindle support the work material, cutting and drilling of two ends.
2.Operation
2-1. The tailstock hand wheel is located next to the speed control box, please
operate transmission shift handle, and then turning the hand wheel tailstock
spindle to do 1 to 1 or 1 to 4 fast-slow moving for drilling feed and
backward.
2-2. Shaft-clamp spindle fixed the tailstock center.
2-3. Clamping plate for fix the tailstock tightly on lathe bed.
2-4.When the center of tailstock center sleeve and spindle are not on the same
level line, please loosen and tight the screw by both adjust screw A。This
adjustment is also available on tailstock center and spindle center horizontal
adjustment for cutting of between center.

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4-6 Apron
1. The main function of the apron is moving backward and forward, the feed slide
auto-feeding and thread cutting auto-feeding; the feed device are: thread
indicator, the half nut control lever, auto-feeding lever ,tappet, longitudinal
feeding hand wheel.
2. Apron with two auto feeding direction, cross-feed and longitudinal feed,
according to the instructions of the nameplates first select operation required
(pull - turn or push -turn knob) , then operate the automatically feed lever down
to engage the feed. There is protection stop device under the apron of
longitudinal feeding to automatically stop. To adjust the distance, loosen the stop
feeding ring on the mounting screws, move the stop feeding ring to the desired
position, then fix.
3. Thread cutting drive
When doing the split nut lever down operation, split nut will combine with the
lead screw and thread cutting up operation. Stop thread cutting, nursing bed
inside safety bar to prevent thread cutting and automatically feed not both
simultaneously to ensure safety.
4. Lubrication switch on Apron is for the control oil lubrication supply to slide. To

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turn off the lubrication, please turn clockwise to the end. Turn counterclockwise
to start lubrication supply. Lubrication has 3 phases, from minimum to maximum
only works on the process of apron moving.
5. There is a control panel at the right hand side of the apron. Each button on the
control panel is “A” Spindle Forward/Reverse, “B” Jog button. To control
spindle Forward or Reverse, press the start button and start cutting. To stop
cutting, please press the stop button in the middle. For emergency stop, please
press Emergency Stop.
6. There is an operation box with control panel at the right hand side of the apron.
7. Left side buttons on the control panel are spindle forward & reverse and jog
button. To control the spindle forward and backward, press the start button and
start cutting. If operator wants to stop cutting, press the stop button in the middle
of the panel. For emergency stop, please press the emergency button on the right
top side button on the panel.
1. Spindle Forward/Reverse 2. Spindle ON
3. Emergency Stop 4. Jog Button
5. Spindle OFF 6. Rapid X/Z Traverse

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4-7 Gear Box
1. Transmission of Gearbox is from Headstock’s forward & reverses mechanism to
idle-gears change up mechanism. And then via two 2 steps and one 3 steps speed
change mechanism within gear box to a 9 steps speed change mechanism. Finally
transfer through feeding change mechanism to lead crew and feed rod.
2. Gear box main function is thread cutting and automatic feed for cutting inch or
metric thread, but still can be cut DP and Module thread without changing any
gear.
3. The thread cutting , please follow the instructions thread cutting chart of various
gear lever placed in the appropriate position in order to cut the require thread
pitch.
4. Automatic feed, please follow the thread cutting chart in section 4-8, depending
on the desired feed rate, various shift levers must be in the correct positions, and
then engage feed lever into position to activate automatic feeding operation.