Thank guys, I'm starting to get a few of the blanks filled in. I now have a few more questions:
I read this (quickly)...
linuxcnc.org/docs/html/lathe/lathe-user.html
I also watched this video on G76 thread cutting...
Links to other applicable documentation or instructional videos (specific to LinuxCNC lathe operation are welcome.
Now the follow-up questions:
1) I don't see a problem using the G76 method in the video above except, I'm a hobby guy so it can be months between thread cutting sessions so with my present memory I would pretty much have to watch that video to refamiliarize myself with the various parameters before I could setup for a thread cut. Is there any sort of thread cutting wizard like GUI thing associated with Axis that simply lets you select the thread type for example 3/8-16, starting here, and ending there that then figures out the arguments required for G76?
2) Presently I have a derivative of the Clough42 ELS on my lathe and it uses a Omron 600 pulse/rev quadrature encoder. Assuming I use a MESA 7i96s to get that quadrature encoder signal into LinuxCNC, will the 600 pulse/rev encoder be fine (ie. not overwhelm Linux with too many pulses if operating at say 2000RPM)?
3) Looks like I will need a one pulse per rev sensor on the spindle correct? The Omron encoder I'm using has a Z output, so I will use that I guess.
4) Regarding the 7i96S, eventually I would like to use one or possibly two MPG style encoders to replicate the hand wheels for X and Z, it seems like I will have enough unused pins on the 7i96S, not sure if those inputs can be used for the MPG inputs and what would be involved in decoding the MPG inputs, possibly some logic in the HAL file?
5) Not sure if I should get a 7i73 for the MPG(s), prefer to keep the hardware to a minimum if I can get away without the 7i73, comments?
6) Regarding X-axis servo. I measured with a peak torque sensor the required torque to do an aggressive cut with a dull HSS tool and peak torque was only 0.5Nm so I'm leaning towards a fairly small servo in the 1Nm range. Do you think this is too small?
7) Last question where can I find appropriate install LinuxCNC install file? I want to see if I can get it running on my RaspberryPi
Much appreciated
