On Dec 13, 2011, at 1:09 PM, Jon Elson wrote:
> If you can send me a picture form Halscope, I can compare it to what I 
> get.  Are you using FF2?
> This can be quite helpful in fixing errors on acceleration.  You have to 
> use it in VERY small
> amounts, though, like .005 or even less.  It is easy to add too MUCH FF2 
> and cause jerks
> in the response.  

Yes, see post in response to Peter Wallace.

> Also, there is a manufacturing issue in these, where 
> the encoder ring may
> fit loosely on the splined hub that mounts to the shaft.  On some units 
> you need to put a
> little dab of RTV, super glue or whatever on the splined hub to lock the 
> ring to it.  You
> can poke the ring with an X-acto knife to see if there is any play 
> between it and the hub
> when the whole thing is assembled.

Mariss from Gecko suggested this to me early on, so we super glued the collars 
to the shafts.  This did indeed help a little, one of them was slipping badly, 
the others perhaps a small amount.  He also suggested adding a tiny bit of 
silicone caulk to one of the cogs in the gear to take up any slop in the fit 
(both pieces are plastic after all).  I did that as well, but I don't think 
there was much slop to begin with so that provided no noticeable improvement.

-Tom


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