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Don, you are absolutely correct on what you stated. I’m a bit more conservative in that I keep the minimum speed around 30 Hz. Torque ratings drop dramatically at those lower HZ settings anyway. And again, with non VFD rated motors, you have to check the voltage, FLA ratings and the...

That’s why, on older motors, I always use line and load reactors. Yes, it costs more, but I’ve never had a motor failure after many years and many hours of run time. Additionaly keeping the speed maxed at around 60 Hz provides that extra assurance that the motor will siurvive. The newer VFD...

My previous post stated the reasons for holding close to those parameters. Older motors, like you are using, were designed for 60 Hz and not rated for VFD use, however most of them will work OK if they are wired and set up correctly. I would further suggest using line and load reactors...

Great to hear that you may have solved the problem. I would agree with Nick that this setting is internal compensation for current/torque. Also noted the HZ settings available are way above 60 Hz. Older motors like you are using need to be at the 60 Hz settings, otherwise you run the risk of...

On all of my installs I don’t use wire nuts on the motor connections, but instead use ring terminals crimped to the wires then attached together with appropriately sized machine screws and nuts. It’s more work and requires taping the finished connections but insures a solid trouble free...

I’ll jump back into this problem again and recommend that you get the motor tested at your local motor shop. If it’s OK then you can deal with the VFD and wiring. I’ve done lots of VFD work and can tell you that most older motors work the best with no problems, if installed correctly. That...

I would get the motor checked out, then you’ll know if it’s OK. On the VFD issues, I’m using several of them on old frame motors for years with zero problems. I use GS 2 AC micro drives purchased from automation direct.com. My mill is a Lagun, many years old with a 2hp 3 phase motor. The drive...

I’ve seen this setup before. Using a non-standard motor for a mill, then modifying it by adapting a flange plate to mount it. In most cases it can be done, so at this point I would proceed to get the motor checked out at a motor shop. With that diagnosis you can decide the next step. Your...

The nameplate on your motor states a 182 frame size plus it appears to be totally enclosed as well. That style in a 1 hp tells me that it is probably special for your machine as most replacement standard 1 hp motors do not come in that size frame. Keep in mind that the frame size determines all...

I think more diagnostics are neede here to find your exact problem. If you have the motor leads connected together as shown on the motor nameplate and those resulting three leads connected to the VFD per the instructions and it still doesn’t run correctly, take the motor to your local motor shop...

I’m a new member here and noticed your post on difficulty machining the valve. I was part of the GEARS organization and have prototyped and machined all of these engines from 2004 thru 2012. If you still need help on this, I have detailed instructions on this.