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View Full Version : PRS Alpha Spindle not responding to RPM requests



coryatjohn
01-11-2020, 12:41 PM
I'm writing this post not asking for answers but to show what I did to solve the issue.

I'm still on the original SB software I received with the machine: 3.6.38. It was working perfectly and I don't want to rock the boat. My computer started acting up a few weeks ago and the last time I started the computer, it took a lot of fiddling to get it to run. I've left it running since.

Time for a new computer. I ordered a cheapo replacement from eBay. A custom configured Windows 7 64 bit Dell model with an SSD drive for a whopping $150 delivered. Nice computer, about half the physical size of my previous computer. I loaded the 3.6.38 software and everything looked good.

I had zero issues with the USB interfaces, including the spindle. The problem I found was that I couldn't control the spindle RPM. It read 466 on the RPM window and when I tried to change it, the 466 kept returning. The VFD showed 14,000 which was the last RPM I had used to run a job.

I tried all sorts of things to get past this problem and today, after giving up on the internet, I asked Shopbot support (on a Saturday) what's up. Ben gave me the final answer.

I didn't know that clicking on the RPM in the RPM window would bring up a previously unseen text edit window for the spindle controller. Ben gave me that hint and also sent me a link to a video that covers pretty much everything one would want to know about spindle problems:

https://drive.google.com/file/d/1lVJxIzw7TOBOngr6mGMOPFG1iBJNVfWK/view

I got about 3 minutes into the video and saw my issue. I have a V1000 VFD controller and that one wasn't selected in the RPM window. I changed that to the V1000, also changed the Htz scale from 100 to 60 and all is well again.

Now I have my newish computer configured properly and the Shopbot is responding as expected. Hopefully, I'll have another seven years of trouble free operation.

Thanks Ben!

barrowj
01-12-2020, 07:41 AM
Thanks for this Cory, good information if and when I change my control computer.

Joe