Created Date: January 16,2012

Created by: Adisharr

I 've done this a few times using ballscrew type rodless actuators and another manufacturers servo motor on wire tension testing machines. The tension level was fairly repeatable. Generally torque mode is the simplest mode you can run in a servo drive as the PID loop is not involved. This may not be the case for very sophisticated drive systems (Delta Tau, etc..) but is for most lower cost systems.

If the Kollmorgen table your referring is actually a linear motor then you'll probably get fairly good results. They make good linear motor systems.

The tension resolution / linearity is going to depend mainly on the friction in your system and the resolution of torque parameter in your motor system.

Also keep in mind that in some systems, running in straight torque mode will run the motor as fast as possible until it reaches the torque level set. Some systems have a velocity limit so you don't crash into things but in others need to be run in a velocity or position mode until you 're very close to your intended target.

You may also have to experiment with a force transducer depending on the accuracy required as over time, things will change and your tension settings will be off.

Created Date: January 12,2012

Created by: galanm

I'm devloping a system to drive a saw or drill down through cut medium at a constant force. I don't need positional accuracy or speed but the amount of force applied needs to be constant and adjustable from test to test. Kollmorgen linear tables have all the accuracies called out except for the constant force. Would I be better off using a rodless with belt or screw drive? It appears those type have the force range I will need (5-15#). Has anyone incorporated this methodolgy into a test fixture or press?

Thanks