Spindle RPM Cap

We use 4 jaw chucks all of the time and 6 jaw adjust true. We are a job shop and it allows me to move from job to job much faster than boring jaws. Most of my turning centers the brake is the engagement of both the high and low speed clutches. During a spindle stop condition My spindles can be turned by hand I also have a brake and neutral selector switch.

SRT wrote: We use 4 jaw chucks all of the time and 6 jaw adjust true. We are a job shop and it allows me to move from job to job much faster than boring jaws.

Ha ha ha ha! See...? That's just too funny! Figures though... No production here. All prototyping.

SRT wrote: Most of my turning centers the brake is the engagement of both the high and low speed clutches. During a spindle stop condition My spindles can be turned by hand I also have a brake and neutral selector switch.

So, if you manually step the spindle override down to zero during a program, you can spin your chuck?
I don't have that. If I'm in the middle of a program and override down to zero, the chuck is for all intents and purposes locked in place.

I can not manually turn my spindles down to zero......we have a range say from 50%-150%. Spindle only stops with a command either M5, M00, M01, or the Feed hold and manual spindle stop.

No production here but i may be running 10 shafts in the morning and in the afternoon turn the jaws over and run 3 bearing caps (chucking work). I am running Linuxcnc on a 10 inch Turning center and a 15 inch Turning center and a Fagor on my 18 inch turning center. The 15 and 18 are old Cinci MO series lathes that can do 30 inch chucking work with the facing turret.

SRT wrote: I can not manually turn my spindles down to zero......we have a range say from 50%-150%.

This is just a configuration option in LinuxCNC though.

My mill has feed over-ride set from 0 to 2000% because I basically have no "feel" for milling feeds yet

The option is nice. My goal is to keep the machines as close as possible to the various commercial controllers I have in the shop. Of course as we find better ways LinuxCNC definitely gives us options.


I think we are going to stop the spindle trough an Ice Cube relay directly at the drive. So the feed hold signal could be used to pull in the relay for permission to let the operator stop the spindle, the spindle will have to be restarted and the spindle up to speed signal read before cutting resumes. This will be our work around until jog while paused is figured out.