Dynomotion

Group: DynoMotion Message: 6549 From: matteeboy71 Date: 1/22/2013
Subject: Anilam conversion help
Hi DynoMotion group

I have kind of got an axis for my mill operating but I can't quite get it to perform as it should.

The linear encoder is 10um on a 5mm pitch ballscrew. The axis does move and follow the motion profile in a fashion but whatever way I try to tune it it seems like a weak servo. If I increase the proportional band further, it Judders. I'm wondering if I need a higher resolution encoder so the following error is corrected more often but I'm guessing.

I have a tacho option on the SEM brushed motor and AMC drive but it hunts +/- 40 counts if I try that.

Any help would be appreciated
Group: DynoMotion Message: 6550 From: Tom Kerekes Date: 1/22/2013
Subject: Re: Anilam conversion help
With glass scales it usually helps a lot to have some feedback from the motor shaft (tach).
 
Do you have the AMC amplifier in velocity mode?
 
You will likely need some D gain to help stabillize the system.
 
Post some screen shots so we can see your settings and the response you are getting.
 
You can use Alt-PrintScreen to copy a Window to the clipboard.  Then paste into something like Paint and save to a .png file.
 
We need to see the Step Response, Filter, and Config/Flash Screens to see all your settings.
 
Regards
TK