Sick Jet

Re: Sick Jet

Dave Paine

If I recall there was a thread about a VFD (variable frequency drive) on a General lathe a few years ago which stopped after a brief power outage. The remedy was to unplug the lathe for e.g., 30 minutes.

I do not know why this worked, but it did. An easy step to try.

Re: Sick Jet

Brad Vietje

That may work. The Powermatic lathes have a reset button on the VFD; does this Jet model have the same?

Safe spinning,

Brad Vietje

Newbury, VT

Re: Sick Jet

Ralph Lindberg

If the electronics needs to be "reset" that's not a bad way to do it.

Unfortunately there is a chance the electronics let all their magic smoke out and the reset will not work.

Re: Sick Jet

Josh Bowman

The VFD on these lathe are more akin to a computer than power supply. When the power flicks on and off it confuses their little brains. And unplugging and allowing it to restart most often fixes it. Because the power flicker thing (that we get often) can cause worse problems, like the magic smoke, I've put a power disconnect on my 3 VFD's in my shop, these are mounted so I don't have to get on my knee's to unplug the things.

Re: Sick Jet

Doc Green

I believe the Jet uses the same VFD as the Powermatic, namely a Delta S1. Going on that assumption, . . .

1. Make sure the ON/OFF switch (big red knob) is OFF.

2. Apply power to the lathe. See if it will run.

3. If not, Push big red knob in. Then press STOP/reset and then RUN on the VFD.

4. See if it runs now. If it doesn't, be sure the speed control is set to mid range and then cycle the big red knob ON OFF ON etc.

If the lathe does not run at this point, a more in depth troubleshooting procedure will be required. Don't panic. No special electrical knowledge is required. Details are given on my website:

http://www.docgreenwoodturner.com/pmcontrol1.html

Do not assume that just because the lathe was running when the power went off that all the controls (big red knob, speed control, forward/reverse) are good. It is likely they are, but there are exceptions. The last PM I worked on had an intermittent problem inside the VFD AND an intermittent ON/OFF switch. The ON/OFF switch had not shown any problems before the completely unrelated problem in the VFD developed.

Good Luck!

~Doc

This always works for me

John K Jordan

One of my Jet 1642's does that if the power is disconnected for a few minutes. This is a 110 volt model.

I'm not home right now but I think there is normally an "F" and a frequency/rpm number (around zero when not spinning) on the LED display on the back of the VFD box. When this glitch happens the normal display is replaced with an error code or something, (OC... .?)

One of these days I will fix it but so far this always works: leave it unplugged for a while, turn the power switch off and turn the speed control down. Plug in the power cord while watching display on the back of the VFD. If it does not display the normal value then I unplug and quickly plug it in again. Repeat as needed until the lathe works. As I said, so far this has always worked, although it may require a few tries.

JKJ

Re: This always works for me

Ted okolichany

John,

After the reset with the plug and unplugging, it will indicate no error code.Except for the stop run, lights are on in red. When I put power to the lathe with the speed control, that is when the spindle shudders, and the error code OCC comes on..and. a no go. Thanks for your reply.

Ted