SECTION 1 - CONTINUED
Tread Wheel Mounting
This section applies to mounting the tread wheels on the HD2 tread assembly.
NOTE
•
Do not tighten the drive wheel bearings until after the tread is placed on the wheels.
•
Do not tighten the idlers. Tightening may prevent the idler from spinning.
1. Place the drive wheels in the front and back. The chain sprockets should be positioned outside of the wheel. Refer to Fig 3A/B.
2. Slide the outside plate on so that both wheel shafts come through the wheel tension blocks.
3. Fasten the side plate on using provided machine screws. Refer to Fig 5A.
4. Tighten the set screws on the wheel tension blocks using an allen wrench. See Fig 5B for set screw placement.
Tread Mounting and Alignment
This section applies to mounting the treads and aligning them.
NOTE
•
Tread alignment is critical. Tighten and align regularly after running the motors.
•
Place the robot on blocks to allow treads to rotate freely.
1. The treads can be worked on by rotating them with the wheels. Wrap the tread over one wheel, with the internal cleat straddling
the wheel. Begin to rotate both wheels and push the tread onto the other wheel until it slips into place.
2. Repeat on the other tread.
3. Tension the tracks with the 1/4-20 bolts to move the wheels outward. Evenly tighten each bolt. Tension bolts should be tightened
until the treads are tight. Ensure tension is equal across all four bearing blocks and that all tension bolts are set properly.
4. Tighten the wheel tension block bolts.
5. Tighten the jam nuts against the tension bolt welded nuts.
6. The procedure may need to be repeated when the motors are hooked up. The treads need to run at full speed while spinning freely.
The treads should remain in the correct position while the wheels spin. Repeat the above steps to align wheels and keep tracks
centered. As small as a half turn on the tension blocks can result in a difference in tracking.
7. Slide the motors back in their chassis slots to tension the chain. Tighten the motor mount screws. If the motors experience uneven
loads the chain may be too tight.
FIGURE 4A
7
FIGURE 4B
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