The never ending THC Saga !!

[manmeran]

It depends on what your max speed in motor tuning is set to

yes.
my mistake. i forget about max speed.
thx for Correct my mistake and sorry for it.

Amir

[stirling]

he he - that's ok Amir 

so what is your max speed set to? and do you use a THC300 or similar? I think it would be useful if we could share settings and experiences.

Cheers

Ian

[manmeran]

yes, i build my THC300 and use it.
i set velocity for Z axis about 100IPM.

THC would not work with the Smooth Stepper.

i think we can use modbus+SS for plasma machine


Amir

[richyrich212]

My current setup is as follows:

z-axis is  direct drive rack and pinion 848 steps per rev.

THC300

accel is set @ 100 in/s

velocity is set @ 200 ipm

THC rate is set @ +20


My setup is currently off site.  I will tune later on in the week and ill report back with my findings.    In the meantime would others like to post there z axis specifics and info!!!!

I think this will help me and other people tune, their machine.   

Surely  some of us have struggled with this in the past


Thanks

[rrc1962]

With a Z velocity of 200IPM, your THC Rate needs to be much lower than 20.  My Z velocity is 30 on a lead screw and a THC Rate of 10 - 15 works best.  With your Z velocity, I would start at 10 and work back from there.  That, or slow down your Z velocity in Mach.  Why do you need 200IPM on the Z?

[richyrich212]

Thanks everyone for all the help.   I successfully got my THC tuned    !!!!!       My final numbers were as follows:

acel  = 75ipm
velocity = 75ipm
thc rate =  9




Thanks again to anyone who had input !!!