CIRCUIT

[Bluechip]

CIRCUIT THINGY

I don’t think the  run jog switch will work for jog, it will stop just like pushing the stop push button. So what is the purpose of it?

Don

Hi All,

It's a circuit copied / derived from a commercially built VFD remote pendant.  ( Except the Speed Pot. wiring ).

I decided to make one of my own for the Myford S7  and fit it to it's industrial stand after removing the original control panel.

No Don, I came to the same conclusion as yourself when I saw it. On the original it's marked as Run/Jog so that's what I put .

Never needed to 'jog' the S7 anyway.        Got chuck keys for that. 

Dave

[Lew Hartswick]

Functional but I would prefer the controls to be in the supply side rather than the ground side .
   ...lew...

[Bluechip]

Functional but I would prefer the controls to be in the supply side rather than the ground side .
   ...lew...

I presume (?) the VFD expects those voltage levels .... 

Dave

EDIT A very cursory check suggests  the control lines sink the current to opto-couplers in the VFD... 

[Don1966]

I presume (?) the VFD expects those voltage levels .... 

Dave

EDIT A very cursory check suggests  the control lines sink the current to opto-couplers in the VFD... 

You are correct Dave. I installed a VFD years ago on my Myford lathe if you remember. It has 24VDC control and you can source or sink the controls. A jumper on mine determine which to use. And Dave I don’t need jog mode either.

Don

Edit Jo: to correct HTML codes