woodmizer LT70 Series User manual

Wood-Mizer® Sawmill
Remote Operation
LT70 AC Remote rev. B4.00
(Rear Hydraulic Control Box)
Operator’s Manual
This manual is to replace the related appropriate
information from the non-remote sawmill
Operator’s Manual
Form #680
!

Table of Contents Section-Page
2 ROdoc101008 Table of Contents
SECTION 1 REMOTE OPERATION 1-1
1.1 Preparing for Remote Operation ...............................................................................1-2
1.2 Remote Sawmill Operation .......................................................................................1-4
1.3 Preparing The Remote Option For Towing...............................................................1-5
1.4 Cold Weather Operation............................................................................................ 1-6
1.5 Hydraulic Control Operation..................................................................................... 1-7
SECTION 2 MAINTENANCE & TROUBLESHOOTING 2-1
2.1 Clean The Cable Chain & Support Tray ...................................................................2-1
2.2 Cable Chain Repair.................................................................................................... 2-2
2.3 Cable Chain And Support Tray Alignment............................................................... 2-3
SECTION 3 ELECTRICAL WIRING DIAGRAMS, AC REMOTE 3-1

Remote Operation
Remote Operation ROdoc101008 1-1
1
SECTION 1 REMOTE OPERATION
The Remote Option provides remote operation for all sawmill functions from a single loca-
tion at the front of the sawmill. The option includes all cables with traveling guide chain, a
remote electrical power junction box, a front-mounted sawmill control box, and a remote
clutch mechanism with switch to engage the blade from the remote location.
The Remote Option also includes Wood-Mizer’s Simple Setworks system which allows
automatic, incremental up/down movement of the cutting head.

Remote Operation
Preparing for Remote Operation
1
1-2 ROdoc101008 Remote Operation
1.1 Preparing for Remote Operation
Set up the sawmill as instructed in your sawmill operator’s manual.
CAUTION! Moving the saw carriage before removing the
cable chain support may cause damage to the chain. Also,
moving the saw carriage when the chain is frozen can dam-
age the chain. See Section 1.4 for recommended chain
deicing procedure.
See Figure 1-1. Before moving the saw carriage, remove the cable chain support
bracket.
1. Disengage the rubber strap holding the cable chain to the support bracket.
2. Loosen the handles and remove the support bracket from the sawmill track rail.
3. Place the support bracket on the storage bracket located on the sawmill frame between
the first and second bed rails. Tighten the handles to secure the support bracket to the
storage bracket and secure the rubber strap in the bracket hole.
FIG. 1-1
Store chain support on
bracket between first
and second bed rails
3H0479
Remove strap
from cable chain Loosen handles
and remove
chain support

Remote Operation
Preparing for Remote Operation
Remote Operation ROdoc101008 1-3
1
See Figure 1-2.
FIG. 1-2

Remote Operation
Remote Sawmill Operation
1
1-4 ROdoc101008 Remote Operation
1.2 Remote Sawmill Operation
See Figure 1-3. All sawmill controls operate exactly as described in your sawmill opera-
tor’s manual except the clutch/brake. Instead of pulling a handle to engage the blade,
push the toggle switch on the control panel up. Hold the switch up until the clutch motor
stops completely. The remote clutch mechanism will disengage the brake, rev the motor
to full throttle, and start the blade spinning.
DANGER! Keep all persons out of the path of moving
equipment and logs when operating sawmill or loading and
turning logs. Failure to do so will result in serious injury.
To stop the blade and engage the blade brake, push the toggle switch down. This will also
return the engine to idle.
NOTE: Be sure the toggle switch stays in the up or down position. The boot on the switch
may spring the switch back to neutral. You may need to hold the switch in position until
the remote clutch motor completes its cycle.
FIG. 1-3
3H0362

Remote Operation
Preparing The Remote Option For Towing
Remote Operation ROdoc101008 1-5
1
1.3 Preparing The Remote Option For Towing
1. After placing the saw head in its traveling position, engage the remote clutch switch to
engage the drive belts. This will keep the engine from bouncing while towing the sawmill.
2. Place the chain support bracket under the cable chain, located between the first and sec-
ond bed rails.
See Figure 1-4.
3. Tighten the support handles and secure the chain to the support with the rubber strap.
FIG. 1-4
Install chain support
to top track rail between
first and second bed rails
Clamp support to
rail with handles
3H0480
Secure chain to
support with strap

Remote Operation
Cold Weather Operation
1
1-6 ROdoc101008 Remote Operation
1.4 Cold Weather Operation
If the sawmill is operated or stored in freezing conditions, the cable chain may freeze.
Before moving the saw carriage, check to see if the chain is frozen:
1. Remove the chain support bracket (See Section 1.1).
2. Pull the chain up at a few locations to determine if it moves freely. If you detect the chain
is frozen, proceed to the recommended deicing procedure below.
3. If the chain seems to move freely by hand, use the power feed to slowly move the saw
carriage toward the rear of the mill. Since the saw carriage returns only at full speed,
moving the saw carriage forward will allow you to slowly engage the cable chain to be
sure it is not frozen. If you detect the chain is frozen, proceed to the recommended deic-
ing procedure below.
Recommended Cable Chain deicing Procedure
To de-ice the chain, apply a salt solution (preferably calcium chloride and water) to the
entire length of the chain. Allow the solution to sit until the chain can move freely. The
strength of the solution and time required to free the chain will depend on how cold the
weather is and how much ice has accumulated in the chain.
Before storing the sawmill after using the salt solution, be sure to rinse the salt from any
metal portions of the sawmill frame to prevent corrosion. Refer to the recommended
cold-weather storage procedure below to prevent the chain from freezing.
Recommended Cable Chain Ice Prevention Procedure
Before storing the sawmill in freezing temperatures, apply a 50/50 solution of environ-
mentally safe antifreeze (Sierra) and water to the cable chain. A garden sprayer can be
used to apply the solution.

Remote Operation
Hydraulic Control Operation
Remote Operation ROdoc101008 1-7
1
1.5 Hydraulic Control Operation
The hydraulic control levers become operational when the contacts at the bottom of the
carriage touch the power strip on the frame tube. The hydraulic control levers will only
work when the cutting head is close enough to the front end of the mill to touch the power
strip.
See Figure 1-5. Hydraulic units have six control levers to load, clamp, turn and level logs.
FIG. 1-5 OPERATOR CONTROL BOX
Clamp
In/Out
Clamp
Up/Down
Turner
Front Toe
Board
Rear Toe
Board
Loader

Remote Operation
Hydraulic Control Operation
1
1-8 ROdoc101008 Remote Operation
Use the hydraulic control levers to get the mill ready to load a log.
DANGER! Keep all persons out of the path of moving
equipment and logs when operating sawmill or loading and
turning logs. Failure to do so will result in serious injury.
CAUTION! Always make sure the engine is running before
operating the hydraulic controls. Operating the controls
without the engine running will result in power drainage
from the battery.

Remote Operation
Hydraulic Control Operation
Remote Operation ROdoc101008 1-9
1
1. Move the clamp out and down so it will not get in the way of logs being loaded onto the
bed.
Lower the clamp in/out lever to move the clamp out toward the loading side of the saw-
mill.
Lower the clamp up/down lever to lower the clamp below bed level.
2. Raise the log loader lever to extend the legs of the log loader out as far as they will go.
3. The chain securing the log loading arm to the bed frame will be tight. Manually push the
log loader arm until there is slack in the chain.
4. Unchain the loading arm from the bed frame.
5. Lower the turner lever to completely lower the turner arm. Notice that after the turner arm
is all the way down, the side support braces will begin to lower. Release the turner lever
after the turner arm is lowered, but before the side supports begin to lower. This stops the
log being loaded from damaging the turner and/or falling off the side of the sawmill.
6. When raising the turner lever, the side supports rise first. After reaching a fully vertical
position, the turner arm will engage and start to rise.
7. Manually lower the log loader so it rests on the ground.
CAUTION! Be careful when manually lowering the log
loader. Do not drop the loader onto the ground or perform
any action which might break the velocity fuse valves on
the loader cylinders. These valves control hydraulic flow
and are necessary to prevent the loading arm from collaps-
ing during use.
8. Lower the loader lever to lower the loading arm as far as it will go. Logs must be rolled
onto the loading arms one at a time.
9. The front, middle and rear toe boards should be below bed level. Once a tapered log has
been loaded, the front or rear end of the log may be lifted to parallel the heart of the log to
the path of the blade.
The front toe board is raised by lifting the front toe board lever up.The middle toe board is
raised by lifting the middle toe board lever up. The rear toe board is raised by lifting the
rear toe board lever up. Once a flat has been made and the log is ready to be turned,
push the appropriate toe board lever down to lower either toe board until it falls below the

Remote Operation
Hydraulic Control Operation
1
1-10 ROdoc101008 Remote Operation
level of the bed.

Maintenance & Troubleshooting
Clean The Cable Chain & Support Tray
Maintenance & Troubleshooting ROdoc101008 2-1
2
SECTION 2 MAINTENANCE & TROUBLESHOOTING
2.1 Clean The Cable Chain & Support Tray
As you operate the sawmill, be aware of any pieces of debris that may fall on the cable
chain and/or support tray. Stop the sawmill and immediately remove any pieces of wood,
bark or anything else that may divert the path of the chain or cause it to jam.
Clean the cable chain and support track of sawdust buildup every eight hours of opera-
tion. Blow or brush the sawdust from the track and tray and remove any accumulated
sawdust that is high enough to contact the chain/tray.

Maintenance & Troubleshooting
Cable Chain Repair
2
2-2 ROdoc101008 Maintenance & Troubleshooting
2.2 Cable Chain Repair
If a component of the cable chain breaks or is missing, replace the component.
CAUTION! Do not operate the remote sawmill if the cable
chain is damaged or components of the chain are missing.
The chain components are interlocking and continued oper-
ation will cause more damage to the chain.
See Figure 2-1. To disassemble the chain use a screwdriver to pry the connecting links
apart. After removing the connecting links, the side plates can be disassembled by pulling
them apart at an angle.
FIG. 2-1
3H0485

Maintenance & Troubleshooting
Cable Chain And Support Tray Alignment
Maintenance & Troubleshooting ROdoc101008 2-3
2
2.3 Cable Chain And Support Tray Alignment
During each sawmill setup, check the alignment of the cable chain and the support tray:
1. The chain should travel in a straight line. Traveling at an angle will cause the chain to pre-
maturely wear and break. Check the alignment of the chain by measuring from the saw-
mill frame tube to the center of the chain at the top and bottom. The measurements
should be the same (±1/8”).
See Figure 2-2.
Loosen the mounting bolts at the top or bottom of the chain to adjust the distance from the
sawmill frame tube.
FIG. 2-2
A
B
A = B (±1/8")
3H0507B
Front End View of
Remote Chain

Maintenance & Troubleshooting
Cable Chain And Support Tray Alignment
2
2-4 ROdoc101008 Maintenance & Troubleshooting
2. The chain support tray must be level to prevent premature wear of the chain. Use a
square to check the angle of the tray to the sawmill frame. Check at several locations
along the length of the tray.
See Figure 2-3.
Bend the tray up or down as necessary to square it to the sawmill frame.
FIG. 2-3
3H0508B
Front End View of
Remote Chain
90°

Electrical Information
Electrical Information D42doc101008 3-1
3
SECTION 3 ELECTRICAL WIRING DIAGRAMS, AC REMOTE
IMPORTANT! When using a sawmill with the rewired con-
trol panel it is very important not to switch between saw
head forward/backward movement until the saw head
stops. Failure to do so may result in serious sawmill dam-
age.
WARNING! When using the variable reverse speed wiring
it is recommended that the operator should stop the head,
turn the potentiometer to zero, engage reverse and then
increase speed. Failure to do this may result in damage to
the circuit. There is a protection in the circuit and if this is
activated it will not allow the head to start the return move-
ment until the potentiometer is set to zero.
!

3-2 doc101008 Electrical Information
FIG. 3-1 . LT70 AC REMOTE ELECTRICAL DIAGRAM (400V - HYDRAULICS)
L1 L3L2
L1 L2 L3
T1 T2 T3
1M
LC1K12
F1M
LR2K0316
PEN
M
3~
PE
0 240 380 415
230
024 0014
CKF
L1 L2 L3
11
14
RM4TG
12V
L
N
+
-
F4
C60N 1P C1
1 2
3 4
5 6
OT4SE3
Q1
L11 L13L12
L21 L22 L23
0-12VDC +12VDC
1 2
0-14VAC +14VAC
0-24VAC +24VAC
24V ~ Ls
L3 L2
L1
T3 T2
T1
11
F1
C60N 2P C6
F24
N24
+24
-24
F2
C60N 1P C2
L3L2L1
L3 L2
L1
L3L2L1
L11 L13L12
L11 L13 L12
L13L12
L23 L22
L21
100 102 101
103 105 104
T1 T3 T2
106 107
L11 L13 L12
108
110109
6460 1410 230200
25 64
60
231 200
44 40
4541
108
Silnik
hydrauliki
400VAC
50Hz
G1

3-3 doc101008 Electrical Information
FIG. 3-2 LT70 AC REMOTE ELECTRICAL DIAGRAM (400V - MAIN)
ATV31
L1 L3 L2
U1
W1
V1
L1 L2 L3
T1 T2 T3
PE
L1 L2 L3
T1 T2 T3
L1 L2 L3
T1 T2 T3
M
3~
ATV31
L1 L3 L2
U1
W1
V1
L1 L2 L3
T1 T2 T3
M
3~
PE
M
3~
PE
M
3~
PE
L1 L2 L3
T1 T2 T3
H
3M
LC1D18
2M
LC1D25
1M
LC1D25
GV
GV3ME40/25-40A
F1
C60N 3P C10
2S
LC1K06
5S
LC1K06
F5S
LR2K0308
1 2
3 4
5 6
OT4SE3
Q1
L31 L33L32
L21 L22 L23
L31 L33L32
L31 L33 L32
111 113 112
111 113 112
114 116 115
114 116 115
117 119 118
U2
W2
V2
W1
U1
V1
120 122121
122 121
124 123
120 122 121
U1
W1
V1
120 122 121
U1
W1
V1
120 122 121
129 131 130
123 125 124 126 128 127
132 134 133
T1 T3 T2
NapĊd piáy
18,5kW
Posuw G/D
1,1kW
Posuw P/T
1,1kW
Korowarka
0,75kW

3-4 doc101008 Electrical Information
+12VDC
E-STOP
2–0–1
3
4
3
4
Styki - B
24
1
AccuSet 2
AC Drive
Interface
Niebieski
ĩóáty
Czerwony
-12VDC
Czarny
2
9
1
Stacyjka Góra/Dóá
8
COM AI1 +10V AI2
+24V LI1 LI2 LI3
LI4 LI5 LI6 CLI
AI3 COM AOV AOC R1B R1C R2A R2CR1A
Brązowy
ĩóáty
Niebieski
Biaáy
Zielony
RóĪowy
Siwy
Czerwony
ALTIVAR 31
Góra/Dóá
Transducer
45 41
46
47 48 49
50 51
41
41
41
FIG. 3-3 LT70 AC REMOTE ELECTRICAL DIAGRAM (12VDC)