My Build - I blame you lot for this....!

**HiltonSteve** · 02-08-2009

Made it all myself, let me know what you want in it and I will see what I can do.

**HiltonSteve** · 02-08-2009

OK latest update...

Been trying to mill a 3D rooster from the Cut 3D demo program this afternoon and found a problem with my machine, after doing a finishing cut with a 3mm ballnose it returned to x0 y0 and was about 3-5mm out. I put it down to loosing steps and tried different settings in the motor tuning by changing the velocity and accel, made absolutely no difference at all.

Then I remebered that I had upped the kernal speed when trying 1/16th stepping so I dropped it down from 45k back to 25k and hey presto, no more lost steps, in fact the motors are running a lot smoother and the ballscrews vibration seems to have dissapeared.

Don't fully understand this so if someone could explain why the kernel speed was so critical I would be interested to know.

I am ruuning mach on an old compaq P3 866mhz machine but in the driver setup program it said it was running 'excellent' at 45k.

**John S** · 02-08-2009

You must be nuts to run at that kernal speed.

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**HiltonSteve** · 02-08-2009

Originally Posted by John S

You must be nuts to run at that kernal speed.

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Had to up the kernal speed because it was limiting the max speed of the motors. At 1/16th microstepping I was set at 3200 steps per mm which meant the max i could get the velocity to was about 460mm / min.