Messages

1

Mach4 General Discussion / Re: Lathe Electronic Leadscrew / Gearbox

« on: June 18, 2019, 07:16:43 PM »

Craig and RT,
Thanks for your help. It looks like I have a fair amount of reading to do on g code.  I don't understand the G words enough to read programs well.  I do have two more questions.  The examples I have seen for G95 seem be for mills, does G95 work for lathes?  Why wouldn't I use that?

Thanks
Jason

2

Mach4 General Discussion / Re: Lathe Electronic Leadscrew / Gearbox

« on: June 18, 2019, 06:41:46 AM »

Craig,
Upon Re-reading your posts and advice, I may have misinterpreted what you said about the encoder or may not have been clear in my previous posts.

The quadrature encode with an index connected to the spindle to measure rpm. How do i get Mach4/PMDX to provide a continuous string of pulses to match the spindle speed
* ratio.

Z axis rpm (feed rate) = spindle rpm * ratio

The ratio takes into account the feed per revolution of the spindle and the lead screw pitch.

Thanks,
Jason

3

Mach4 General Discussion / Re: Lathe Electronic Leadscrew / Gearbox

« on: June 17, 2019, 04:53:01 PM »

Craig,
The Driver is HBS86H "Hybrid Servo Drive".  The motor Model Number number is 86HSE8N-B32.  My understanding when i bought them was that they were not a true servo but a stepper motor with encoder feedback into the driver.

I'm ok with the system functioning as a you describe it.  My goal is to get to a point where I can choose a feed rate or a TPI and enter that in to the software so that i can use the threading dial on my lathe.  I already owned Mach 4, so it made sense for me to try to do this way.

Thanks
Jason

4

Mach4 General Discussion / Lathe Electronic Leadscrew / Gearbox

« on: June 17, 2019, 02:40:08 PM »

I am trying to use Mach 4 as an electronic lead screw for my old atlas lathe.
Hardware: PMDX SmartBOB 416, Generic Quadrature Encoder (1024 SPR) with index, Leadshine Hybrid Stepper Moor.
Sofware: Latest PMDX Drivers and Firmware and Mach 4 Build 3804.

I have managed to get the RPMs to display on a DRO in Mach 4. I have also connected the motor and run it in jog mode. But i have not been able to figure out how to link the 2 together and apply a ratio for feed rate or TPI.  I anyone can provide any guidance on how to do this or a link to a thread where this was discussed that would be great.
Thanks in advance.
Jason