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Messages - wini

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1
General Mach Discussion / Re: Dimensions Problem ... Help Please
« on: November 24, 2013, 01:57:05 PM »
Yes, the used endmill bit has the same specifications that in CAM software.

What worries me is that the error increases when I increase the work dimension.
 In a small works the error be small ( about 2 or 4 mm ) and with the large works the error up to 9mm or 1 Cm with itself bit.

I set the drivers on 10 microstep now and I doing the calibration to try it.

wini

2
General Mach Discussion / Re: Dimensions Problem ... Help Please
« on: November 24, 2013, 11:54:27 AM »
Thanks Hood,

Initially,  I have set it at "8" microstep . Then, I changed it to "2" to solve this error,  the error still exists. But I didn't use 10 before.
I will try that.

3
General Mach Discussion / Dimensions Problem ... Help Please
« on: November 24, 2013, 06:56:03 AM »
Hello,

I have finished my DIY CNC router for wood working and I am using Mach3 software with it. But I have faced a problem which is that there is a difference in dimensions  between designed dimensions in CAM software and  executed dimensions on the machine. The difference are 8 mm increment in Y axis and 6 mm increment in X axis.

I mean that I draw a square ( width = 10.00 cm ) on CAM software ( like Artcam & Vectric Aspire ).  After finishing the job on the machine and when I measure the dimensions of engraving square, I find them are 10.8 cm ( in Y axis) and 10.6 cm ( in X axis ).
Or if I make a circle diameter 25 cm, the measured diameters after engraved are 25.9 cm ( in Y ) and 25.68 cm ( in X ).

I have used
KL-5056D Digital stepper drivers from www.automationtechnologiesinc.com
SFU1605-C7-1055 Ballscrews from www.automationtechnologiesinc.com


In mach3 settings, I have set the value of ( steps per unit ) in motor tuning as the following :
( 200 * microstep of uses drivers )* (1 / ballscrew pitch in mm) 
( 200 * 2 )* 1/5 = 80

And then I have set the axis calibration from ( alt + 6 ) as usual.
But the problem still exists.

Can any one help me ? How can I cancel this increments ?

Thanks a lot for any help..

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