Here is how we fixed it.
Step 1: Tools
- Screw drivers ( 3 standard sizes).
- A hammer.
- Set of allen keys (different sizes).
- Thin wire.
Step 2: Diagnostic
- - Once powered, we were able to diagnose that sander belt was not turning but the engine was working fine. The motor seamed to have no load; it was spinning but nothing else happened.
- We decided to open the machine.
- While unscrewing for opening the cover, we realized that one screw was missing. We used an screw of the same size from the robotic life tool box.
Step 3: Opening and Identification of Missing/broken Parts
- Once opened, we suspected that there was something wrong between the motor and the sander belt. However, we couldn't identify right away which pieces were broken.
- We inspected the motor axis with a wire, trying to pull off the loose pieces. Though we were able to identify which pieces were out of place (rubber belt and motor axis cap), we couldn't take them out.
Step 4: Moving the Motor
Step 5: How Could the Wheel Be Taken Off?
Step 6: Fidding the Appropriate Rubber Belt
We did an online search for the sander "model number" and "drive belt" or "rubber belt" or "sander replacement parts". However, we didn't find an exact mach with our model.
Then, we looked at the "rubber belt" specification numbers and realized that it has a standard specification which can be obtained from various online vendors.
Hence, after counting the number of marks on the rubber belt (80), we were able to find the vendors:
Step 7: Installing the New Rubbert Belt
The pulley was a bit loose so we used an old trick and put paper between the motor shaft
and the pulley.
The pictures below depict the steps for setting up the new belt:
1. (p. 0185):
Old belt vs. New belt. Notice the lack of teeth of the old belt.
2. (p. 0188):
Install plastic pulley on motor shaft. Used paper on shaft to increase
friction fit. Rubber hammer was used to install the pulley
3. (p. 0186, 0187):
Install belt and tighten tension bolt with adjustable wrench.
Step 8: Working Like a Charm!
Hope this helps other people!
Ryan, Jerome, Selene, and Ned