Re: Aerotech Motors with WorldServo Drives

Peter, thanks a ton for the info. No luck at all with Worldservo.
They don't have any telephone numbers on their website (bad
indicator) and they haven't responded to my email yet. I printed out
the pdf you pointed to and will read up. I think the drives are
actually excellent units, but probably a little more than someone
like myself should tackle with my current knowledge. I am using the
worldservo drive software at this point, not mach2. I did try mach2
initially but when things didn't run correctlty, I started working my
way back from the drives. The software for the drives is pretty
usefull. The motors do make noise, have resistance when powered, and
turn in one of the test modes in the software. But they do wierd
inconsistant things sometimes. Most of the time they don't make a
complete rotation they just kinda osilate, shutter and the drives
shuts itself down for rms. I'll keep trying. cheers.

Mark

--- In CAD_CAM_EDM_DRO@yahoogroups.com, Peter Renolds <prenolds@s...>
wrote:

> Hi Mark,
>
> Have you tried calling World Servo? They might be your best source

of

> help, if no-one here responds. To begin with, I would reduce your

Kp

> and Kv values and Ki can be set to zero to begin with. What are

the

> maximum values? (Maybe32,768?) Try something more in the 1000 -

5000

> range. If you browse the Galil website - specifically:
> http://www.galilmc.com/support/appnotes/optima/note3413.pdf you'll

get

> a better idea about the relationship between P,I & D and how to

tune a

> servo system. Gecko's and Rutex's websites also have some tuning

info

> pertaining to their drives, but it still is helpful.
>
> Does the motor make any noise? If you try and move the motor shaft
> (when the drive is powered up) does it resist your effort? Are you
> absolutely sure your software is putting out step (and direction)
> commands? These are big motors - what machine are you installing

them

> on? FYI, it appears you'll only get about 1000 rpm at 60 volts

based on

> the 60V/krpm and the drive is limited to 75V.
>
> Cheers, Peter
>