My scale is off by a factor of 5?
- vladilinsky
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19 Apr 2012 16:43 #19377
by vladilinsky
My scale is off by a factor of 5? was created by vladilinsky
Hello,
I have just assembled my motors lead screw and sheaves
- motor 600 oz in nema 34 - ?200 steps per rev?
machmotion.com/cnc-products/drives-motor...n-stepper-motor.html
- motor sheave 72 notches
- lead screw sheave 32 notches
- lead screw 3/4-6 acme
I calculated this to be 0.0018" per step, PnCConf confirmed this under scale setup.
but when I try to test the setup it is nearly 1/5 of what it should be? ie if i tell it to go 10 inches it will go 2
Any Ideas?
Thanks for looking.
I have just assembled my motors lead screw and sheaves
- motor 600 oz in nema 34 - ?200 steps per rev?
machmotion.com/cnc-products/drives-motor...n-stepper-motor.html
- motor sheave 72 notches
- lead screw sheave 32 notches
- lead screw 3/4-6 acme
I calculated this to be 0.0018" per step, PnCConf confirmed this under scale setup.
but when I try to test the setup it is nearly 1/5 of what it should be? ie if i tell it to go 10 inches it will go 2
Any Ideas?
Thanks for looking.
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19 Apr 2012 18:07 #19378
by PCW
Replied by PCW on topic Re:My scale is off by a factor of 5?
what kind of step drive and what are its settings?
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- vladilinsky
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19 Apr 2012 18:21 #19379
by vladilinsky
Replied by vladilinsky on topic Re:My scale is off by a factor of 5?
Its a gecko 203v with no resistor (7Amp)
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20 Apr 2012 00:22 #19381
by cmorley
Replied by cmorley on topic Re:My scale is off by a factor of 5?
doesn't gecko do micro stepping? if it does 5 time micro stepping then the scale would be wrong.
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20 Apr 2012 00:51 #19382
by cmorley
Replied by cmorley on topic Re:My scale is off by a factor of 5?
hmm gecko 203 does 10 x microstepping.
you need to account for that.
Inches per step would be .0001875
but the scale is what is important.
What scale did pncconf give you ? 5333.3333
But one would expect it to be 1/10 of distance rather then 1/5th - I wonder if something else is happening too...
you need to account for that.
Inches per step would be .0001875
but the scale is what is important.
What scale did pncconf give you ? 5333.3333
But one would expect it to be 1/10 of distance rather then 1/5th - I wonder if something else is happening too...
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- vladilinsky
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20 Apr 2012 01:21 #19384
by vladilinsky
Replied by vladilinsky on topic Re:My scale is off by a factor of 5?
It gives me a scale of 533.3333333
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21 Apr 2012 05:06 #19412
by cmorley
Replied by cmorley on topic Re:My scale is off by a factor of 5?
then it seems you forgot to account for the micro stepping.
the gecko multiplies the 200 steps the motor has by 10.
the gecko multiplies the 200 steps the motor has by 10.
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22 Apr 2012 15:00 - 22 Apr 2012 15:00 #19435
by vladilinsky
Replied by vladilinsky on topic Re:My scale is off by a factor of 5?
after fixing the scale it looks to be much closer now, thanks!
Last edit: 22 Apr 2012 15:00 by vladilinsky.
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