Automatic pause when spindle is started

Hello,

It takes some time for my spindle to reach the desire rotation speed. So I have to manually ad a G4 P10 on every file that is generated from my CAM tool.
Is there a way to tell LinuxCNC to always wait for X secodns when the spindle is started before starting to move ?

Than you !

I used the "Spindle at Speed" Function. Like this.


net spindle-cmd <= motion.spindle-speed-out => pwmgen.0.value
net spindle-on <= motion.spindle-on => pwmgen.0.enable
net spindle-pwm <= pwmgen.0.pwm => parport.1.pin-16-out
setp pwmgen.0.pwm-freq 50.0
setp pwmgen.0.scale 30050.0
setp pwmgen.0.offset 0.000998336106489
net spindle-at-speed => motion.spindle-at-speed
setp parport.1.pin-17-out-invert 1
net spindle-on => parport.1.pin-17-out

Thank you that is probably it but not sure where this must be entered...
Nor the action of each individual line (like the value for freq, scale, offset...)

I need to study this somewhere.

Might look here...
linuxcnc.org/docs/html/gcode/m-code.html...53-Feed-Stop-Control

You might also use a user defined M code to start the spindle with a pause, call a sub that turns the spindle on and adds a delay.
Often the g code output of the cam can be modified, if so you can add the delay there or cause spindle on to call a sub.

Rick G

gaeldk wrote:

Thank you that is probably it but not sure where this must be entered...
Nor the action of each individual line (like the value for freq, scale, offset...)

I need to study this somewhere.

So long as you have feedback (tack) from your spindle, you can use this. Or like Rick said, manually adding a pause in the g-code. I did that at first but still managed to crash a bit or two when I forgot to flip the switch on the spindle.

More info here; linuxcnc.org/docs/html/examples/spindle.html

Hello,

I have actually no feedback from the spindle. So I need to put 10 seconds regardless and this should be OK.

A lot of VFDs have a digital output available (either dedicated or programable) to indicate that the spindle is up to speed. If you can bring that in and connect it up to the motion.spindle-at-speed pin that is an ideal solution. If that is not an option, it gets only a little more complicated.
I'd try try connecting the spindle on signal to the spindle is up to speed pin through the timedelay component linuxcnc.org/docs/html/man/man9/timedelay.9.html

If you need help modifying your hal file for this, please ask for help and post your config files and someone can walk you through it (or maybe do it for you).

Yes I think this is the proper solution. My CN is connected via the parallel port so I need to find another IO from the spindle to the PC...

My VFD is a Fuling DZB 300

Gents, I am sitting in the same boat, I would like a time delay, independent of the VFD to delay the rest of the program to run after spindle start. I running from parallel port, so IO is costly. I have done some more investigation and I will try the following tonight:

loadrt timedelay count=1
addf timedelay.0 servo-thread
setp timedelay.0.on-delay 6
setp timedelay.0.off-delay 0
net spindle-on => halui.program.pause
net spindle-on => timedelay.0.in
net spindle-ready <= timedelay.0.out
net spindle-ready => halui.program.resume

Andy, your RS485 sounds like a good solution later on, can you control all the spindle functions this way and do you have a circuit or adaptor suggestion for this?

I am also a newbie to LinuxCNC, so bear with me please.