chedore
GANEX
- Location
- Quebec, Canada
- Occupation
- Electromecanical technician, Automation Technician
Hello there. I am currently working on a thermoforming machine with 2 mold platen, each drived by a 30hp motor controlled by a GS3-4030 VFD with GS-4030-BR-ENC brake resistors. We currently are trying to troubleshoot the lower platen, which triggers an Overvoltage Limit when going down at 10hz. Im thinking about motor regeneration issues. It ramps up to the selected speed and then triggers the limit. The platen supports an aluminium mold used for thermoforming, which lifts and push into the plastic sheets before going back down to the original position. So far, we have tried these solutions: Increasing the Overvoltage limit (and staying in the drive limits), Increasing the decel time, increase slip compensation, try different s-curves... so far no luck.
I was wondering if trying to connect the 2 GS-4030-BR-ENC brake resistor in serie would be a good way to try and find if that was the original problem. Any heads up? Anyone seen this kind of problems before? Thanks for the answers!
-Fred
I was wondering if trying to connect the 2 GS-4030-BR-ENC brake resistor in serie would be a good way to try and find if that was the original problem. Any heads up? Anyone seen this kind of problems before? Thanks for the answers!
-Fred