This manual describes the Laser Sight, an accessory for LT40 and LT70 Sawmills, designed to assist operators in making precise cuts. The primary function of the Laser Sight is to project a visible laser line onto the material being cut, providing a visual guide for the blade's path. This feature is particularly beneficial for indoor cutting applications where the laser beam is clearly visible.
The manual emphasizes safety as the paramount concern, using various signal words to highlight potential hazards. The symbol with an exclamation mark within a triangle indicates instructions concerning personal safety.
- DANGER! signifies an imminently hazardous situation that will result in death or serious injury if not avoided. For the Laser Sight, this specifically warns of visible and/or invisible laser radiation and advises avoiding eye or skin exposure to direct or scattered radiation.
- WARNING! suggests a potentially hazardous situation that could result in death or serious injury if not avoided.
- CAUTION! refers to potentially hazardous situations that may result in minor or moderate injury to persons or equipment if not avoided. Specific cautions for the Laser Sight include:
- Avoiding direct or reflected eye exposure to the switched-on laser optics due to the danger of permanent eye damage.
- Never observing the laser beam through an optical system (e.g., binoculars) as it is very dangerous and inadmissible.
- Securing the working place against the entry of unauthorized persons.
Operators are instructed to read and understand all safety information and instructions before operating, setting up, or maintaining the machine.
Installation - LT40 Sawmills:
The installation process for the Laser Sight on LT40 Sawmills involves several steps:
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Laser Assembly Installation:
- Remove the four lower slide pad mounting nuts located inside the mast post.
- Install the laser assembly onto the slide pad mounting bolts.
- Secure the assembly using the provided 5/16" flat washers and 5/16-18 nylon locking jam nuts.
- A diagram (Figure 2-1) illustrates the mounting washers, mounting nuts, ground screw, and laser assembly.
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Grounding:
- Install the point tip ground screw into one of the small holes in the laser assembly mounting brackets.
- Turn the screw far enough to ensure it contacts the sawmill slide pad bracket.
- IMPORTANT! Proper contact with the sawmill slide pad bracket is crucial for grounding the laser; without it, the laser will not operate.
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Drive Pulley Guard Removal:
- Remove the drive pulley guard to facilitate wire routing.
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Wire Routing:
- Route the wire from the laser assembly as shown in Figure 2-3.
- Attach one of the provided hose clamps to the laser assembly wire.
- Remove the third slide pad nut from the bottom, install the hose clamp, and reinstall the slide pad nut.
- Continue routing the wire downward through the sawmill v-brace.
- Route the wire upward along the side mounting plate, securing it with a wire tie to the outside of the side mounting plate brace.
- Continue routing the wire upward and secure it with a wire tie to the fuel line EMT clamp.
- Connect the laser assembly wire to the existing laser option wire.
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Drive Pulley Guard Reinstallation:
- Reinstall the drive side pulley guard, ensuring the lower part of the laser assembly wire remains outside the guard as shown in Figure 2-4.
- Make sure the wire routes inside the guard at the lower right-hand corner.
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EMT Clamp Installation:
- Install two provided EMT clamps to the section of laser assembly wire that routes along the side mounting plate (underneath the pulley guard).
- Use the guard's mounting washers and bolts to secure the EMT clamps.
Installation - LT70 Sawmills:
The installation process for the Laser Sight on LT70 Sawmills is similar but with specific differences:
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Laser/Bracket Assembly Mounting:
- Locate the four square mounting holes on the saw head near the bottom of the drive-side blade housing.
- Mount the laser/bracket assembly using the four carriage head bolts, flat washers, and lock nuts.
- Place star lock washers between the laser bracket and the saw head to ensure proper grounding. Figure 2-5 illustrates the components.
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Drive Belt Guard Removal:
- Remove the drive belt guard.
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Cable Routing:
- Route the cable from the laser assembly as shown in Figure 2-6.
- Route the laser cable under the saw head along the brace plate.
- Secure the cable with three provided wire clamps, bolting them to the brace plate with M4x16 screws, flat washers, and nuts.
- Connect the red laser cable wire to red accessory wire #25.
- Connect the black laser cable wire to the black -12 V DC wire.
- Use two provided wire ties to secure the laser cable.
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Drive Belt Guard Reinstallation:
- Reinstall the drive belt guard.
Switch Installation - LT40 Sawmills:
The switch installation for LT40 Sawmills involves modifying the control panel:
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Panel Modification:
- Identify the location on the LT40 AC Panel (Figure 3-1) where a hole needs to be cut for the switch.
- For LT40 DC Panel (Figure 3-2), the same process applies.
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Toggle Switch Installation:
- Install the toggle switch, nylon washer, and rubber boot to the front panel.
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Wiring Connections:
- Connect the quick connect terminal on the existing laser option wire (labeled #25) to the bottom tab of the toggle switch.
- Connect the quick connect terminal on the provided fuse assembly to the side tab of the toggle switch.
- Install the ring terminal on the fuse assembly to the ACC post on the key switch. Figure 3-3 provides a wiring diagram.
Switch Installation - LT70 Sawmills:
The switch installation for LT70 Sawmills also involves modifying the control panel:
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Panel Modification:
- Unbolt the front panel from the control box.
- Use the hole in the front panel as a template to cut out a hole in the decal for the laser option switch.
- NOTE: The cut hole will be slightly smaller than indicated by the dotted line on the decal. Figure 3-4 shows the LT70 AC Panel, and Figure 3-5 shows the LT70 DC Panel.
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Toggle Switch Installation:
- Install the toggle switch, nylon washer, and rubber boot to the front panel.
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Wiring Connections (DC Only):
- Connect the quick connect terminal on the existing laser option wire (labeled #25) to the bottom tab of the toggle switch.
- Connect the quick connect terminal on the provided fuse assembly to the side tab of the toggle switch.
- Connect the ring terminal on the fuse assembly to the 'BAT' terminal of the unused circuit breaker in the control box (CB7 on non-remote mills; CB6 on remote mills).
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Wiring Connections (AC Only):
- Connect the quick connect terminals on the provided capacitor assembly to the bottom tab of the toggle switch and the existing laser option wire (labeled #25).
- Connect the capacitor assembly wire with a ring terminal to the ground stud located at the bottom of the sawmill control box.
- Connect the ring terminal on the fuse assembly to the 'ACC' post on the key switch. Figure 3-6 provides wiring diagrams for both LT70AC and LT70DC configurations.
Laser Operation:
Once properly installed, the laser option provides a visual guide for making cuts.
- Turning On: Raise the laser toggle switch to the 'ON' (1) position.
- Turning Off: Lower the laser toggle switch to the 'OFF' (0) position.
Figures 4-1 (LT40 AC Panel), 4-2 (LT70 DC Panel), 4-3 (LT70 AC Panel), and 4-4 (LT70 DC Panel) illustrate the location of the laser toggle switch on the respective control panels.
Laser Alignment - LT40 Sawmills:
Accurate alignment is crucial for the laser sight to function effectively.
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Sawmill Setup:
- Stationary sawmills should be set up on firm, level ground.
- Shim the feet to ensure the sawmill's weight is evenly supported.
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Sawmill Alignment:
- Ensure the sawmill itself is properly aligned (refer to the Alignment Section of your Sawmill Operator's Manual).
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Load Cant:
- Load a cant (log section) onto the bed of the sawmill.
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Test Cut:
- Make a cut.
- Without raising the carriage head, return it to the front of the sawmill so that the blade remains level with the top of the cant and the carriage head is 1' behind the front of the cant.
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Laser Alignment:
- When properly aligned, approximately 10" of the laser beam should show across the front of the cant.
- Vertical Adjustment (Figure 5-1):
- Loosen the assembly mounting fasteners.
- Move the entire laser assembly up or down as needed.
- Retighten the fasteners to secure the assembly.
- For fine-tuning, the laser diode mounting bracket can be moved up or down. Retighten the diode mounting screws after adjustment.
- Addressing Low Beam (Figure 5-2): If the laser beam is too low, it will show against the side of the cant.
- Addressing High Beam (Figure 5-2): If the laser beam is too high, extend the edge of the cant upward by folding pieces of paper in half and positioning them so the folds align with the outside edge of the cant. Use a thumbtack to secure the bottom half of the papers to the cant.
- Horizontal Adjustment (Figure 5-3):
- Loosen the laser pivot screws.
- Pivot the laser diode side to side, or up and down, as necessary.
- Retighten the pivot screws to secure the diode in place.
Laser Alignment - LT70 Sawmills:
The alignment process for LT70 Sawmills is identical to LT40 Sawmills, with the same steps for sawmill setup, alignment, loading a cant, making a test cut, and adjusting the laser vertically and horizontally. Figure 5-1 for LT70 shows the mounting bolts, and Figures 5-2 and 5-3 are generic diagrams for beam adjustment and pivot screw adjustment, respectively.
Replacement Parts - LT40 Sawmills:
The manual includes a detailed parts list and exploded view (Figure 6-1) for the LT40 Laser Assembly. The main kit is "LASER, CUTTING POINTER LT40 KIT" (Part # 505712). Key components include:
- BRACKET, LASER LT40 (505163-1)
- COVER, LASER LT40 (505162-1)
- LASER, Z5M18B-F-532-IG90 LINEAR, GREEN (501025) - This is the laser diode itself.
- Various screws, washers, and nuts (M5x16, M4x16, 5.3 flat zinc, 4.3 flat zinc, M5-8-zinc DIN985, M4-B hex nylon zinc lock).
- ELEMENT MOUNT EE63 (112-312000) - Likely for mounting the laser diode.
- CABLE, 5m SAFETY SWITCH (087652)
- ELEMENT, SELF - ADHESIVE MOUNT E9S (087695)
- CABLE TIE, PLASTIC (F81082-4)
- BRACKET, LASER SMB18SF (503469)
- CAPACITOR, 2200/63V ELECTROLYTIC (091167)
- FITTING, FUSE, WITH WIRE CE PROTECTION (E85238)
Replacement Parts - LT70 Sawmills:
The manual also provides a detailed parts list and exploded view (Figure 6-2) for the LT70 Laser Assembly. The main kit is "LASER, CUTTING POINTER LT70 KIT" (Part # 505713). Key components include:
- BRACKET, LASER LT70 (505161-1)
- BRACKET, LASER SMB18SF (503469)
- LASER, Z5M18B-F-532-IG90 LINEAR, GREEN (501025) - The laser diode.
- Various washers, nuts, bolts, and screws (8.4 flat zinc, M8-8-B hex nylon lock zinc, M8 x 20 zinc mushroom head square neck, 4.3 flat zinc, M4x16, M4-B hex nylon zinc lock, M5x16, 5.3 flat zinc, M5-8-zinc DIN985).
- ELEMENT MOUNT EE63 (112-312000)
- CABLE, 5m SAFETY SWITCH (087652)
- ELEMENT, SELF - ADHESIVE MOUNT E9S (087695)
- CABLE TIE, PLASTIC (F81082-4)
- SWITCH, SPST ON/OFF 15A.25 TABS TOGGLE (P03027) - The toggle switch for operation.
- WASHER, 1/2X3/4X1/16 NYLON (P05251-1)
- BOOT, TOGGLE SWITCH (P02575)
- CAPACITOR, 2200/63V ELECTROLYTIC (091167)
- FITTING, FUSE, WITH WIRE CE PROTECTION (E85238)
The manual serves as a comprehensive guide for installing, operating, maintaining, and sourcing parts for the Laser Sight accessory on Wood-Mizer LT40 and LT70 Sawmills, with a strong emphasis on user safety.
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