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General Mach Discussion / My turret move 0.01mm to Z+ everytime after return the way

« on: September 14, 2008, 08:55:35 PM »

I have test everything.  From Bachlash, and shuttel down to 0.05 in Generál config, Well everytime I return X or Z    like this step 1.000 and send this comand  G01 F50 Z-1 Enter.

A coments, if I drive 1.000 and drive, say 100 times in same direktion, the display shoud wiev 100.000mm  When the same procedure goingback the result is 100.000
The stuped thing is when I change the direction.  All change give 0.01mm always in Z+  or if I drive X this is always 0.01mm in direktion X+
I have test and use Backlash. After that i TEST Motor Tuning. I was test to schange the motorstep from my default 200 to 180 to 220 but that was no solusion.

Anybody ho have any thing like this. Could it be some puls from card when I change the direktion. I have even seen, if I have set home X and Z the display wiev 0.000 on both X and Z. 
 No my gentleman, if I klick on Zero Wold X or  sero wold Z I can hére a click and and the support are move 0.001mm but the display are in same as after homing. 0.000
Ok, if I klick 10 times on etch Z and X  both move + 0.001  +  x 10= 0.010.   Is my cable unsisolated or what are you thinking abut.  I need help folk.
Vicke
 

2

General Mach Discussion / Need more speed to MPG in brain

« on: August 20, 2008, 03:25:45 PM »

Maybe a simple question but I can´t find the answer before is this forum. 
Well, my lathe have around 300mm i Z-axel and some time I need a fast moving from example the end switch to working place 250mm away.
When I have the MPG on and the move is Step 1.000mm  the max feed pratical moving on mach meny are 138.xx     
MPG mode is  Multi Step, MPG feedrate is 1000.
My pc is fast Vista  2 x   2.6 Ghz.   

I drive the Brain found on cnc4pc   and the C22 pendent interface.
I hade even test some higher kernel speed.