A little while back I noticed some variance in the joints of my CH3-R. At first I couldn’t help but wonder whether it would be significant. As it turns out it doesn’t seem to effect my bot. However I can’t help but wonder whether it should be there. Is this normal or have I done something wrong?
Thanks,
Dustin Webb
maybe define what you mean by variance a little bit better.
if you are talking about the fact the servos can be positioned slightly differently from joint to joint it usually isn’t a big deal. some folks go so far as to use spacers to tighten the alignment.
The hardware can work itself loose if you don’t tighten the screws tightly. Is that what you are describing?
Or do you mean slop in the servo gears? perhaps the servos splines being off slightly when all servos are centered? Not all servos have the axact same position when centered so you will need an offset.
To answer the general question “What the hell are you talking about?” I meant the hardware. However I have been meaning to ask about the variance in the centering of the servos so I’m glad it came up.
Yes. I will double check all the fasteners and see if the variance goes away.
I accounted for this in my software and then realized that there is an ssc32 command to adjust for this issue. This does however raise the noob question, is there a good way, for a non-windows user, to determine the exact center and min and max PWM values besides trial and error?
Thanks,
Dustin
Because you are quantifying an unknown, trial and error is the only method. Each servo has its own center, min, and max position. There is no math that can find these positions.
