justin.mercier
Cast Iron
- Joined
- Apr 29, 2010
- Location
- Woonsocket RI
I've got one KBAC27D running my KMG Belt grinder and have had no problems with it for years of use. Based on that I purchased another one this March to run the 2hp 3ph motor on my power hammer. I had just moved my hammer to the new foundation I built for it, and today was setting it back up to run. When I turned the motor on however it clunked stuttered and stalled, then tried to start again, spun, clunked, stuttered and stalled, and kept doing that. I turned it off, and thinking it was the motor, swapped to a different 2hp 3ph motor (this one a slower speed, with more poles) this motor ran 'better' but still clunked stuttered and stalled, and then repeated.
I took the motor down the corner to a friend's shop where he's got straight 3 phase outlets, and they ran perfectly fine and smooth. I plugged my other KBAC27D into the same outlet and it ran my belt grinder just fine, and my 5HP hydraulic press motor ran fine on the outlet as well, so the problem is in the VFD. I just contacted KB Electronics through their website support and asked what I should do, and offered to send them a copy of my reciept of purchase and the like. I hope they respond with something, because these are NOT cheap VFDs, almost 400$ for one of these (almost 600 retail price), so I'm more than a bit upset that this one is only 8 months old, with probably less than a dozen run hours on it and has apparently failed.
Has anyone else had a VFD start to do the same? and if so, how did you diagnose the problem / resolve it, if you were able?
here are some very low quality cellphone vids, which are better for the audio than for the video itself. Both motors are making a very high frequency squeal as well, which I've never heard when running off of my KBAC27D
This first video is the original 2hp 1735rpm motor which was running my power hammer.
https://www.youtube.com/watch?v=W85sigHSilk
This second video is the 2hp 850 rpm motor I've also got (twice as many poles)
https://www.youtube.com/watch?v=xA6wezbkWYg
I hope that KB Electronics stands behind their product, the manual says they have an 18 month warranty on their controllers. If i cant get this resolved, then I guess it's time to build a 5hp RPC with a motor iv'e been offered.
EDIT: For clarification, I am using the KBAC27D with 230v single phase input, 3phase output.
-Justin
I took the motor down the corner to a friend's shop where he's got straight 3 phase outlets, and they ran perfectly fine and smooth. I plugged my other KBAC27D into the same outlet and it ran my belt grinder just fine, and my 5HP hydraulic press motor ran fine on the outlet as well, so the problem is in the VFD. I just contacted KB Electronics through their website support and asked what I should do, and offered to send them a copy of my reciept of purchase and the like. I hope they respond with something, because these are NOT cheap VFDs, almost 400$ for one of these (almost 600 retail price), so I'm more than a bit upset that this one is only 8 months old, with probably less than a dozen run hours on it and has apparently failed.
Has anyone else had a VFD start to do the same? and if so, how did you diagnose the problem / resolve it, if you were able?
here are some very low quality cellphone vids, which are better for the audio than for the video itself. Both motors are making a very high frequency squeal as well, which I've never heard when running off of my KBAC27D
This first video is the original 2hp 1735rpm motor which was running my power hammer.
https://www.youtube.com/watch?v=W85sigHSilk
This second video is the 2hp 850 rpm motor I've also got (twice as many poles)
https://www.youtube.com/watch?v=xA6wezbkWYg
I hope that KB Electronics stands behind their product, the manual says they have an 18 month warranty on their controllers. If i cant get this resolved, then I guess it's time to build a 5hp RPC with a motor iv'e been offered.
EDIT: For clarification, I am using the KBAC27D with 230v single phase input, 3phase output.
-Justin