Rigid Tapping Help

Bump!

Any pointers?


The previous owner did this conversion with the original steppers and then later converted to servos. He's fairly confident that he had used rigid tapping after the servo conversion (meaning the config should be correct), but I don't think he was 100% sure.

I glanced over the ini and hal and didn't see anything obviously wrong but maybe one of the experts could confirm.
How low of an rpm can you go with your vfd?

Seems the encoder is not registering the index signal....but is registering rotation/rpm. More trouble shooting tomorrow!

Can you currently turn on the spindle in a cw and ccw direction?
Can you confirm that in halmeter if you load the encoder.05 it's counting + and -?
Can you turn the spindle manually very slowly and see if the encoder.05 index led blips brown/yellow one per revolution? If you can't turn it slowly you'll need to use halscope to trigger it.

Your ini's name suggests this is on a Boss5 BP type of machine? Can tell us where the encoder is fitted on your machine? Is the vari-disc "gear box" in place and being used? If so, is your spindle at speed correct?

OT-CNC wrote: I glanced over the ini and hal and didn't see anything obviously wrong but maybe one of the experts could confirm.
How low of an rpm can you go with your vfd?
It doesn't seem to like anything below 100rpm, but does fine on the next click up around 120rpm.

Seems the encoder is not registering the index signal....but is registering rotation/rpm. More trouble shooting tomorrow!

Can you currently turn on the spindle in a cw and ccw direction?
Yes, spindle functions perfectly in both directions.
Can you confirm that in halmeter if you load the encoder.05 it's counting + and -?
Yes, encoder counts both directions
Can you turn the spindle manually very slowly and see if the encoder.05 index led blips brown/yellow one per revolution? If you can't turn it slowly you'll need to use halscope to trigger it.
No change/response shown on any of the index variables.

Your ini's name suggests this is on a Boss5 BP type of machine? Can tell us where the encoder is fitted on your machine? Is the vari-disc "gear box" in place and being used? If so, is your spindle at speed correct?

Correct, it's a rigid ram Boss 5. Encoder is mounted on top of the spindle pulley. The machine has been retrofitted with pulley drives, the varispeed is long gone. Speed appears to be correct, though i haven't checked it with a tach yet. I ha no reason to believe it's off.

^^

How is the encoder connected to your board? Index going to the right connection?

It's a 7i77 and I haven't made any changes to the wiring, so assuming it was set up properly when I brought it home, it should be.

Is there an easy way to test the index signal or would I need a scope?

Let's not assume.
You are telling us you are not reading an index pulse. Let's rule out the wiring. Check with the manual to see if the index wire goes to the correct physical pin on the board.