Re: Ideas for matching drives on a YY axis design?

I have a machine with dual y motors and matching them didnt seem to be
an issue. I just kept the tuning pots at approx the same place by eye
and it works great. I dont think the tuning is that critical. In other
words, close is good enough.

Just a sidenote for those having trouble tuning G320's: My main
problem was trying to get good rapid speeds out of the machine. My
G320 drives would fault randomly at frequencies over about 25Khz. I
need 40Khz+ to get 100 ipm travel speed. I finally booted the machine
into "safe mode command prompt only" (yes dos safe mode doesnt load
himem.sys or anything)and now I can reliably get 60Khz out of it. At
those frequencies, it only takes a 2.1 ms glitch to fault the drives.
Dean

--- In CAD_CAM_EDM_DRO@y..., "caudlet" <tom@t...> wrote:
> Group:
>
> Here is the basic design. Moving gantry table 72" X 80" (outside)
> with twin ballscrew servo drives on the YY axis. Just got my Gecko
> 340's in yesterday and in reading the tuning instructions I started
> to think about ways to "balance" the two YY drives. The servos have
> 500 count encoder as well as tach feedback.
>
> What is the best way to setup the twin screws so they have the same
> characteristics? I have lots of test equipment (300Mhz Tek Scope,
> power supplies, scope current probe, function generator, etc). For
> those of you that have used and setup the Gecko's feel free to throw
> in your 2 cents!