One of my arms, I noticed the gears fit too tight together. I went to disassemble, already threadlocked, and 3 of the 4 bolts stripped, the ones attached to the motor.
A bolt extraction kit is like 20 dollars and maybe even one time use, could I get 3 out with it?
Should I just order a new arm(two half arms), 4.1 gears, a 4.1 hardware bag, and destroy my 4.0 arm? I can probably heat the bolts up with a torch to get them out of the motor
Is it OK to have one arm on 4.1 hardware, and the others on 4.0? The gear ratios are the same, etc? Is anything needed but the idler gear, bolts, and two arm halfs, and maybe it looks like extra bearings?
Is a new encoder board needed or does the old one work OK?
I guess I would plan to eventually upgrade all arms to 4.1 but I kind of want to just see this thing work first. I bought it some time ago and am just getting around to assembly and got stuck here.
@Beagle suggested in another thread using a drill like m3 to drill off the head and a table vice to spin the screws out. That worked, I think I did minimal damage (thermal, from drilling) to the plastic arm so it is probably reusable. I had to use a drill press, a small hand drill wasn’t working well…
I think the question remains though about upgrading to the new arms…if the encoder board will fit..but I can continue assembly maybe with nail polish or purple locktite…
Is the spec of the D shaft set screw known for the motor? I think that is also stripped, no threadlock. I got it off, but I am afraid to put it back on.
Edit: The D shaft set screw appears to be m4 .7mm pitch. Local hardware store had them. I’m good to continue my build.