Setting up some kind of RAMP on the steppers?

Hi,

I have a diy 8x4 router with rack and pinion drive. I've got it moving on linuxcnc using the step wizard program. I'm a convert from turbocnc.

I've played with the settings but can't stop the machine moving like full speed and stopping full speed, I've runout of ideas and hence posting here. I made my gear boxes, first time and to say I'm no mechanic is putting it lightly. I've had some trouble fixing pinons properly on shafts due to lack of key ways. So starting slow on a G01 X50 and then slowing to stop like turbocnc would really help. Its like if I specify F5000 it seems to start at 5000mm/minute from 0 and stop instantly. My axis weight is heavy and some ramp would work wonders?

I'll post my configuration if its needed?

Regards,

dc

I've had pretty good luck with knurling the shaft then pressing the pinion gear onto it.

If you don't have the proper tools to do this right, a hammer, a sharp cold chisels and a lot of patients can achieve the same goal.

But you still need to fix your acceleration settings to stop from tearing things up (not to mention keep from loosing steps)

I've used those bushings (or ones like them) they are pretty ingenious (and they work good too).