want to add 4th axis to stepperworld fet3 board

[gv71]

I bought a FET3/cruiser about a year ago (the fet4
wasn't available yet) and I want to add a rotary table
to my mill. I am running cncpro. How do I drive this
extra axis do I have to add another paralell port? Thanks.


Greg

[balsaman]

You don't Have to run another parallel port, but you would need to run jumpers or something from the unused Fet 3 pins to the new single axis board for step, dir, enable etc.

Eric

[gv71]

Thanks Eric for the info. Now how do I do that as I am not an electronics wiz. Is there some info on the web somewhere? Thanks again!
Greg

[balsaman]

I would ask Russ at stepperworld which pins are available and where they are located on the board. I don't have the board in front of me (I sold mine). I think russ has single axis boards as well.

Eric

[gv71]

Eric,

Russ said there was only 2 pins available for the extra drive and he said he doesn't have any 2 pin(step and direction) drives. I thought I could just wire them into the remaining pins in the parallel port as only 14 of the 25 pins are being used, am I missing something here. I'm sorry to keep bothering you and thanks for helping me.



Greg

[gv71]

Here is what Russ wrote back to me: "It is possible that you could drive a forth motor by using the 2 aux output pins to interface with another driver. However, I don't have any single
axis drives that use just step/direction interface (2-wire interface)"