woodmizer LT60 Guide

LT60/70 AC/Remote Accuset
Safety, Operation, Maintenance
& Parts Manual
ASET for AC LT60/70
& LT70-R mills rev. A.03 - E.06
Safety is our #1 concern! Read and understand
all safety information and instructions before oper-
ating, setting up or maintaining this machine.
December 2002
Form #1112

©2019
Printed in the United States of America, all rights reserved. No part of this man-
ual may be reproduced in any form by any photographic, electronic, mechanical
or other means or used in any information storage and retrieval system without
written permission from
Wood-Mizer
8180 West 10th Street
Indianapolis, Indiana 46214
California
Proposition 65 Warning
WARNING: Breathing gas/diesel engine exhaust exposes you to chemicals known to
the State of California to cause cancer and birth defects or other reproductive harm.
xAlways start and operate the engine in a well-ventilated area.
xIf in an enclosed area, vent the exhaust to the outside.
xDo not modify or tamper with the exhaust system.
xDo not idle the engine except as necessary.
For more information go to www.P65warnings.ca.gov.
WARNING: Drilling, sawing, sanding or machining wood products can expose you to
wood dust, a substance known to the State of California to cause cancer. Avoid inhaling
wood dust or use a dust mask or other safeguards for personal protection.
For more information go to www.P65Warnings.ca.gov/wood.
TOC

Table of Contents Section-Page
Table of Contents 60AS-R02doc032519 iii
SECTION 1 SETUP & OPERATION 1-1
1.1 Control Setup..........................................................................................1-1
Contrast Adjustment..............................................................1-2
AC Sawmill Model Configuration (Rev B.00+ Only) ...........1-2
Startup Configuration ...........................................................1-4
Auto-Bump (Rev. E.O4+ Only).............................................1-8
Other Settings........................................................................1-9
Restore Factory Defaults ....................................................1-17
1.2 Mode Selection.....................................................................................1-19
1.3 Using Auto-Down Mode ......................................................................1-21
1.4 Using Auto-Up Mode...........................................................................1-23
1.5 Using Pattern Mode..............................................................................1-24
1.6 Using Reference Mode (Rev. B.00+ Only)..........................................1-26
SECTION 2 ACCUSET TROUBLESHOOTING 2-1
2.1 Common Problems .................................................................................2-1
2.2 Accuset Display Problems......................................................................2-4
Control Panel Replacement ..................................................2-4
Resetting the Accuset ............................................................2-5
2.3 Up/Down Control Lights........................................................................2-8
MOSFET Panel Test (DC Sawmill Only) ...........................2-10
Replacing the MOSFET Panel (DC Sawmill Only) ............2-13
2.4 Accuracy Problems...............................................................................2-15
2.5 Sensor LED Lights (Rev. D.02 - E.02 only) ........................................2-16
SECTION 3 REPLACEMENT PARTS 3-1
3.1 Sensor Assembly ....................................................................................3-1
3.2 Control Assembly...................................................................................3-4
Accuset Rev. E.03 - E.06...............................................3-4
3.3 Control Assembly...................................................................................3-6
Accuset Rev. B.00 - E.02...............................................3-6
3.4 Control Assembly...................................................................................3-8
Accuset Rev. A.00 - A.03...............................................3-8
3.5 Cover Assembly ...................................................................................3-10
INDEX I

Setup & Operation
Control Setup
1
1-1 60AS-R02doc032519 Setup & Operation
SECTION 1 SETUP & OPERATION
1.1 Control Setup
See Figure 1-1. Turn the key switch to the accessory (#3) position on DC mills or (#1)
position on AC mills. The Accuset control starts in Manual Mode by default. See the figure
below for identification of the control buttons and display.
About using the Up/Down Adjustment Buttons: To make adjustments to a setting,
push the Up or Down arrow buttons to scroll to the desired setting. To scroll fast in the up
direction, push and hold the Up button first. While pushing the Up button, push the Down
button to increase scrolling speed. Quit pushing the Down button to slow scrolling. Quit
pushing both buttons to stop scrolling. To scroll fast in the down direction, push and hold
the Down button first, then push the Up button. Pushing the Up and Down buttons simul-
taneously during startup will reset the Accuset programming to factory default settings
(prior to Rev. E.00 only).
In Manual Mode, the up and down arrow buttons have special functions. You can enter
configuration menus by pushing the Up button. Pushing the Down button moves the saw
head to the software revision of the Accuset control.
About the Toggle button: Use the Toggle button to exit configuration menus and return
to the main menu. Pressing and holding the Toggle button during startup will display the
Reset Settings menu (Rev. E.00+ Only). Pressing the Toggle button in Manual Mode will
place Accuset in Reference Mode (Rev. B.00+ Only).
FIG. 1-1
Mode Select
Up
Down
Toggle
Increment Settings
HOURS:
Manual Pattern
Manual Mode
|Auto-Down| Auto-Up |
0:00:34
6 3/4
3H0821
Display
Current Mode Session Time (hrs:min:sec)
Current Blade Height (inches)

Setup & Operation
Control Setup
Setup & Operation 60AS-R02doc032519 1-2
1
1.1.1 Contrast Adjustment
When the Accuset is first powered on, the Adjust LCD Contrast screen is displayed for a
few seconds. Push and hold the Up or Down button to adjust the display contrast as
desired for your lighting conditions. To save the new contrast setting, push the Up arrow
button and push Save Settings, then Save Now.
1.1.2 AC Sawmill Model Configuration (Rev B.00+ Only)
The Accuset is programmed for operation with DC-powered
LT60HD/70HD sawmills by default. If your sawmill is
DC-powered, skip to Startup Configuration. If your sawmill
is AC-powered, the Accuset needs to be reprogrammed.
Follow the instructions below.
Push the Up arrow button to display Configuration Menu #1.
See Figure 1-2.
Choose “Other Settings” button from Configuration Menu #1. Push the “Change Lan-
guage” button. Push the “Other Languages” button twice to scroll to Change Language
menu #3.
FIG. 1-2
Save
Settings
Other
Settings
Calibrate
Head
Set
Kerf
CONFIGURATION MENU 1
3H0821-1
HOURS:
Manual Pattern
Manual Mode
|Auto-Down| Auto-Up |
0:00:34
6 3/4
Push UP button to enter
Configuration Menu 1

Setup & Operation
Control Setup
1
1-3 60AS-R02doc032519 Setup & Operation
See Figure 1-3. Push the unlabeled button (third from the left) to display the “Debug”
menu. The current mode will be displayed.
Rev. E.04+: Push the “DC or AC Mode” button to change the mode to AC. Push the Tog-
gle button to exit the Debug Menu. Push the Up button to enter Configuration Menu #1.
Select "Save Settings" then "Save Now" to store the control in AC Mode. Procede to
Startup Configuration.
Rev. E.00-E.03: Push the “DC or AC Mode” button to change the mode to AC. Press
“Save Now” to store the new mode setting. Procede to Startup Configuration.
See Figure 1-4.
FIG. 1-3
FIG. 1-4
Portuguese
Exit
Config
DC or AC
Mode
English
DEBUG MENUS
DC-AP FALSE
CHANGE LANGUAGE 3
3H0821-13
Push Unlabeled button
to enter Debug Menu
Bump U
Push DC or AC Mode
to change
Save
Now
Exit
Config
Use <- -> buttons to
adjust, then save.
3H0821-11B
|
|
|
|
|
|
|
|
Push Toggle button to exit
DEBUG MENUS
AC

Setup & Operation
Control Setup
Setup & Operation 60AS-R02doc032519 1-4
1
Rev. B.00-D.03: Push the Up button to change the mode to AC, then push “Save Now”.
Press “Save Now” again to store the new mode setting. Procede to Startup Configuration.
See Figure 1-5.
1.1.3 Startup Configuration
Accuset controls on new sawmills are configured at the factory. If you have installed or
replaced the control, be sure to configure the control before operating the Accuset. Follow
the procedures below in the order they are listed.
See Figure 1-6. To enter Configuration Menu 1, push the Up button while in Manual
Mode.
FIG. 1-5
Save
Now
Exit
Config
Use <- -> buttons to
adjust, then save.
MODE DC / PID RESET
3H0821-11
|
|
|
|
|
|
|
|
Push UP button to switch
to AC Mode

Setup & Operation
Control Setup
1
1-5 60AS-R02doc032519 Setup & Operation
FIG. 1-6
Save
Settings
Other
Settings
Calibrate
Head
Set
Kerf
CONFIGURATION MENU 1
3H0821-1
HOURS:
Manual Pattern
Manual Mode
|Auto-Down| Auto-Up |
0:00:34
6 3/4
Push UP button to enter
Configuration Menu 1

Setup & Operation
Control Setup
Setup & Operation 60AS-R02doc032519 1-6
1
Adjust Gradient. If the Accuset is factory-installed, the Gradient Setting is already
set to match the gradient of the transducer sensor (labeled "GRD" on the sensor). If
the Accuset has been installed in the field, the transducer replaced or the Accuset
control has been reset to Factory Settings, the Gradient Setting should be adjusted.
See Figure 1-7. To enter Configuration Menu 1, push the Up button while in Manual
Mode. Push the button labeled “Calibrate Head”, then the “Adjust Gradient” button to dis-
play the menu below.
See Figure 1-8. Push the Up or Down buttons until the Gradient Setting is the same as
the sensor gradient shown on the sensor label (use the number labeled “us/in”). Push the
Save Now button to store the new Gradient Setting. If you don’t want to save the new set-
ting and want to return to the previously stored Gradient Setting, push Exit Config and
turn the key switch to the off (#0) position.
FIG. 1-7
FIG. 1-8
Sa v e
Now
Exi t
Config
Se t G r a d i e n t
3H0821-8
9.1292
Use + - buttons to
adjust, then save.
Press UP or DOWN buttons
to adjust Gradient
3H0817-7B
LHSD600U03601R0
S/N: 00245408
GRD: 9.1292us/in | 2782.28m/s
CPN:
Label (See Detail)
DETAIL

Setup & Operation
Control Setup
1
1-7 60AS-R02doc032519 Setup & Operation
Press At 12 Inches (or 305mm in metric mode). The Accuset control should indi-
cate the actual position of the blade above the bed rails. To check this setting, move
the saw carriage so the blade is positioned above a bed rail. Raise the saw head
until the blade is positioned 12" (305mm) by actual measurement from the bed rail.
Measure from the top of the bed rail to the bottom of a down-set tooth of the blade.
While in Manual Mode, push the Up button to enter the Configuration Menu.
Choose Calibrate Head and press the button labeled "Press at 12 inches" (or “Press
at 305mm”). The display will change to "Head Calibrated". Push the Save Settings
button to store the new 12-inches setting and exit the Configuration Menu.
Adjust Offset. Although you can use the Offset value to adjust the Accuset control,
it is recommended that you use the Press At 12 Inches setting to make this adjust-
ment. The Offset value is provided for diagnostic reasons and should not need to be
adjusted.
After recalibrating the Accuset control, check and adjust the inch scale on the
saw head to match the value displayed on the control. Adjust the bottom saw head
stop bolt all the way down. Move the saw head down until Accuset displays 3/4” and
adjust the bottom saw head stop bolt up until it just touches the saw head.

Setup & Operation
Control Setup
Setup & Operation 60AS-R02doc032519 1-8
1
1.1.4 Auto-Bump (Rev. E.O4+ Only)
By default, the Auto-bump feature is not activated. To activate Auto-bump, push the Up
button to enter Configuration Menu #1.
Choose “Other Settings” button from Configuration Menu #1. Push the “Change Lan-
guage” button. Push the “Other Languages” button twice to scroll to Change Language
menu #3.
See Figure 1-9. Push the unlabeled button (third from the left) to display the “Debug”
menu below. Push the “Bump U” button to toggle the Auto-bump feature on ("AP TRUE")
and off ("AP FALSE"). Push the Toggle button to exit the Debug Menu. Push the Up but-
ton for Configuration Menu #1. Select "Save Settings" then "Save Now" to store the
Auto-bump setting.
FIG. 1-9
Portuguese
Exit
Config
DC or AC
Mode
English
DEBUG MENUS
DC-AP FALSE
CHANGE LANGUAGE 3
3H0821-13
Push Unlabeled button
to enter Debug Menu
Bump U
Push DC or AC Mode
to change

Setup & Operation
Control Setup
1
1-9 60AS-R02doc032519 Setup & Operation
1.1.5 Other Settings
Set Kerf. The Kerf setting is optional. The default kerf setting is ’0’. You can use the kerf
setting to automatically factor the blade thickness into the increment setting. Factoring the
kerf into the program will allow you to saw boards that are the actual thickness of the pro-
grammed increment. For example, if kerf is set to ‘0’ and you have programmed incre-
ments of 1 1/8”, the resulting boards will be about 1 1/16” thick because Accuset did not
factor the thickness of the blade. If you enter an accurate kerf value, the resulting boards
will be 1 1/8”. Whether or not to use the kerf setting is dependant on your sawing prac-
tices and application.
See Figure 1-10. While in Manual Mode, push the Up button to enter the Configuration
Menu. Press the “Set Kerf” button to display the menu below.
See Table 1-1. Recommended kerf settings for various blades are provided below.
These kerf setting values assume the teeth of the blade are set per factory specifications.
If you prefer, a nominal kerf value of .125 (3 mm) can be entered and should be accurate
enough for most applications.
Push the Set Kerf button and use the Up and Down buttons to adjust the kerf setting.
Pushing the Up and Down buttons simultaneously will scroll the kerf faster. Push the
Save Now button to store the new Kerf Setting. If you don’t use the Kerf Setting, be sure
to include the thickness of the blade in your increment settings as described in Section
1.2 Mode Selection.
FIG. 1-10
Blade Thickness Blade Style Kerf Setting
.042 10S 0.084 (2.2 mm)
.045 9S 0.090 (2.3 mm)
10S 0.095 (2.5 mm)
.055 10S 0.111 (2.9 mm)
TABLE 1-1
Save
Now
Exit
Config
Use +- buttons to
adjust, then save.
SET KERF
3H0821-4
0.000
Press UP or DOWN buttons
to adjust Kerf Setting

Setup & Operation
Control Setup
Setup & Operation 60AS-R02doc032519 1-10
1
See Figure 1-11. You can change other settings for the Accuset including the language
used on the display, the unit of measure, PID values and analog limits. These settings are
found in Configuration Menu 2. To display Configuration Menu 2, push the Up button
while in Manual Mode to display Configuration Menu 1. Select Other Settings to display
Configuration Menu 2.
FIG. 1-11
Change
Language
Analog
Limits
Unit of
Measure
PID
Values
CONFIGURATION MENU 2
3H0821-2
Save
Settings
Other
Settings
Calibrate
Head
Set
Kerf
CONFIGURATION MENU 1
Push Other Settings button in Configuration
Menu 1 to enter Configuration Menu 2

Setup & Operation
Control Setup
1
1-11 60AS-R02doc032519 Setup & Operation
Change Language. You can choose the language used for the Accuset display. Push the
Change Language button and choose the desired language. Push the Save Now (or lan-
guage equivalent) button to permanently store the new Language setting. To return to the
previously stored Language setting, push Exit Config and turn the key switch to the off
(#0) position. NOTE: Rev. A.00 - A.03 only provide two language screens.

Setup & Operation
Control Setup
Setup & Operation 60AS-R02doc032519 1-12
1
FIG. 1-11
Spanish
English
Other
Languages
Other
Languages
English
French
CHANGE LANGUAGE 2
CHANGE LANGUAGE 1
3H0821-12
Push Other Languages button
to enter Language Menu 2
Portuguese
Exit
Config
English
CHANGE LANGUAGE 3
Push Other Languages button
to enter Language Menu 3

Setup & Operation
Control Setup
1
1-13 60AS-R02doc032519 Setup & Operation
Unit Of Measure. This setting allows you to choose what unit of measure to use for your
Blade Height and Increment Settings. The default value is Fractional Inches (1/32”). You
can change the Unit Of Measure to Decimal Inches (.0313”) or Millimeters (1 mm). Push
the Save Now button to store the new Unit Of Measure setting. To return to the previously
stored Unit Of Measure, push Exit Config and turn the key switch to the off (#0) position.
See Figure 1-12.
PID (Proportional - Integral - Differential) & Motor Deadband Values. These settings
allow a technician to diagnose and fine-tune the Accuset control for various environmen-
tal factors. These settings are made at the factory and should not normally need adjusting
by the operator.
IMPORTANT! Before adjusting the Accuset calibration set-
tings, make sure the up/down chain is clean, lubricated and
adjusted properly. Also check the saw head slide pads are
adjusted properly and the mast rails are clean and lubri-
cated.
FIG. 1-12
Fractional
Inches
Exit
Config
Decimal
Inches
UNIT OF MEASURE
3H0821-6

Setup & Operation
Control Setup
Setup & Operation 60AS-R02doc032519 1-14
1
See Figure 1-13.
Rev. E.00+ Only: To view the PID values, push the PID Values button.
Proportional Gain (UP PGAIN and DOWN PGAIN): The first value displayed is
the Proportional Gain for the up direction (UP PGAIN). By default, the Up value is
active. Use the up and down arrow buttons to adjust the value. Push the button
labeled “Select Next” to activate the Down value (DOWN PGAIN) and adjust with
the up and down arrow buttons as desired.
Integral Gain (UP IGAIN and DOWN IGAIN): To scroll to the next set of values,
push the “Select Next” button. The Integral Gain will be displayed and the up (UP
IGAIN) and down (DOWN IGAIN) values can be adjusted as described above.
Differential Gain (UP DGAIN and DOWN DGAIN): Push the “Select Next” button
again to display the Differential Gain values. Adjust the up (UP DGAIN) and down
(DOWN DGAIN) values as described above.
Motor Deadband Bias (UP DEADBAND and DOWN DEADBAND): Push the
“Select Next” button again to display the Motor Deadband values. Adjust the up (UP
DEADBAND) and down (DOWN DEADBAND) values as described above.
After adjusting all values, push the “Exit Config” button. Push the “Save Now” button to
save any changes you made or press “Exit Config” to ignore any changes and return to
the previously stored settings.
FIG. 1-13 REV. E.00+
Select
Next
Exit
Config
PID UP PGAIN
3H0821-10B
1500
Use <- -> buttons to
adjust, then save.

Setup & Operation
Control Setup
1
1-15 60AS-R02doc032519 Setup & Operation
See Figure 1-14.
Rev. B.00-D.02 Only: To view the PID values, push the PID Values button.
Proportional Gain (PGU and PGD): The first value displayed is the Proportional
Gain for the up direction (PGU). By default, the Up value is active as indicated by
the “><“ symbols. Use the up and down arrow buttons to adjust the value. Push the
button labeled “Dwn” to activate the Down value (PGD) and adjust with the up and
down arrow buttons as desired.
Integral Gain (IGU and IGD): To scroll to the next set of values, push the “Adjust
gain” button. The Integral Gain will be displayed and the up (IGU) and down (IGD)
values can be adjusted as described above.
Differential Gain (DGU and DGD): Push the “Adjust gain” button again to display
the Differential Gain values. Adjust the up (DGU) and down (DGD) values as
described above.
Motor Deadband Bias (DBU and DBD): Push the “Adjust gain” button a third time
to display the Motor Deadband values. Adjust the up (DBU) and down (DBD) values
as described above.
After adjusting all values, push the “Exit” button. Push the “Save Now” button to save any
changes you made or press “Exit Config” to ignore any changes and return to the previ-
ously stored settings.
After making the desired PID Value adjustments, go to the desired Accuset mode. Test
how the changes affect Accuset performance. If the new settings improve performance,
push the Manual button to change to Manual Mode and push the Up button for Configura-
tion Menu 1. Press the Save Settings button. If the new settings cause undesirable
results, turn the key switch to the off (#0) position to return the PID Values to the previ-
ously stored settings
FIG. 1-14 REV. B.00 - D02
Adjust
gain Exit
Up
>1800<
PID PGU: 0
3H0821-10
2731 2731

Setup & Operation
Control Setup
Setup & Operation 60AS-R02doc032519 1-16
1
Rev. A.00 - A.03 Only: The PID settings allow you to calibrate the Accuset control. Cali-
bration may be necessary if Accuset does not accurately position the saw head to the
desired cutting position.
IMPORTANT! Before adjusting the Accuset calibration set-
tings, make sure the up/down chain is clean, lubricated and
adjusted properly. Also check the saw head slide pads are
adjusted properly and the mast rails are clean and lubri-
cated.
See Figure 1-15.
To adjust the Calibration Settings, push the PID Values button. Select the PID set-
ting you would like to adjust:
Kd (Derivative Gain) - This value controls how Accuset stops the saw head when it
nears the desired setting increment. Increasing this value may improve Accuset
accuracy but will also slow down the speed at which the saw head moves to the
desired increment setting. The factory Kd setting is 35.
To adjust the Kd setting, press the Kd button then use the Up or Down buttons to
raise or lower the value. Adjust the Kd setting in intervals of 5 and check the perfor-
mance of the Accuset control. If you reach the upper or lower Kd limit without
achieving desired results, reset Kd to 35 and adjust Ki as described below.
Ki (Integral Gain) - This setting affects the descent and stopping rate of the saw
head. The factory default setting of Ki is “3” and will work for most sawmills. Small
adjustments (no more than ±1) of the Ki setting may improve performance on a spe-
cific sawmill depending on the mechanical condition of the sawmill up/down system.
To adjust the Ki setting, press the Ki button then use the Up or Down buttons to
raise or lower the value. Desired values are in the range of 1-5.
FIG. 1-15
Kp
> 1<
Exit
Now
Ki
3
PID UKP 0
3H0821-5
1872 0

Setup & Operation
Control Setup
1
1-17 60AS-R02doc032519 Setup & Operation
Kp (Proportional Gain) - This value is a multiplier that determines the speed that
Accuset moves the saw head to the setting increment. NOTE: The factory default
setting for Kp is “1” and will work for super sawmills. Adjust the value to “3” for stan-
dard sawmills. After adjustment the Kp value will probably never need to be
changed. Increasing the Kp value will allow Accuset to move the saw head faster
but may also cause the control to drastically overshoot the desired setting.
To adjust the Kp setting, press the Kp button then use the Up or Down buttons to
raise or lower the value.
After making the desired PID Value adjustments, go to the desired Accuset mode. Test
how the changes affect Accuset performance. If the new settings improve performance,
push the Manual button to change to Manual Mode and push the Up button for Configura-
tion Menu 1. Press the Save Settings button. If the new settings cause undesirable
results, turn the key switch to the off (#0) position to return the PID Values to the previ-
ously stored settings.
Analog Limits. These settings are used for troubleshooting diagnostics and should not
be adjusted by the operator unless directed to do so by a qualified Wood-Mizer service
representative.
1.1.6 Restore Factory Defaults
Accuset Rev. E.04+: To return all Accuset settings the their factory default values, press
and hold the Toggle button and turn the key switch on. Release the Toggle button and
press "Default".
Accuset Rev. E.00-E.03: To reset the control to factory settings, push and hold the Tog-
gle button and turn the key switch on. Press “Yes” to reset the Accuset.
Accuset prior to Rev. E.00: Pressing both the Up and Down arrow buttons simultane-
ously and turning the key switch on resets the control to factory settings.
The Accuset settings are now returned to their factory default values, including:
PID values. Rev. B.00+ only: The default values are set for DC-Powered model
sawmills. See Section 1.1.2 to reconfigure for use with AC-powered model saw-
mills.
Calibration settings. See Section 1.1.3 to recalibrate the Accuset control.
Rev. E.04+ Only: Auto-bump feature off. See Section 1.1.4 to turn Auto-bump on.