Unable to Tune a Servo Motor Hardware: Motion Control>>Controllers>>PCI-7344
Problem: I have a National Instruments motion controller card and it is connected to my third party motor and drive (amplifier). I have been trying to tune my servo motor, but it does not seem to work correctly. I have followed the tutorial on your website to both auto tune and manually tune the motor. Regardless of what I try, the motor still seems to behave erratically and spin out of control. Do you have any other suggestions? Solution: If you are trying to tune a servo motor, the place to start is KnowledgeBase 4AD9N5P9: A Simple Method for Servo Motor Tuning and Developer Zone Tutorial: Understanding Servo Tune. These documents are extremely thorough and will walk you through tuning your servo motor step-by-step. In nearly every case, they will allow you to tune your servo motor properly. If you have already gone through these documents and tried both auto and manual tuning without success, you may want to check the product documentation for your motor amplifier. Some motor amplifiers can be set up to work in torque mode or velocity mode. If you are having trouble tuning your servo motor, verify that your amplifier is set up in torque mode. Amplifiers configured in torque mode output a current that is proportional to the input voltage and will only close the current loop, which is what National Instrument's motion controllers are designed to work with. If the amplifier is set up in velocity mode, change it to torque mode and then go through the servo tuning process again. (For more information on the differences between torque and velocity mode, see KnowledgeBase 1A1FUIYP: Torque and Velocity Mode Differences and NI-Motion Compatibility). Related Links: Developer Zone Tutorial: Understanding Servo Tune KnowledgeBase 4AD9N5P9: A Simple Method for Servo Motor Tuning KnowledgeBase 1A1FUIYP: Torque and Velocity Mode Differences and NI-Motion Compatibility Motion Control Support Attachments:
Report Date: 05/14/2004 Last Updated: 05/14/2008 Document ID: 39DHP4QX |
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