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4th Axis calculate steps ?
« on: February 09, 2013, 12:09:18 PM »
Hello together.

Can someone help me?  I purchased a 4th axis for my mill. Now I have to set the steps in Motortuning.

I got a ratio 1/8 because I have two pulleys on it. One with 12 teeth on the Stepmotor and one on the spindle with 72 teeth.

How do I calculate the steps ??

Thank You

Regards

Offline Chaoticone

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Offline Hood

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Re: 4th Axis calculate steps ?
« Reply #2 on: February 09, 2013, 05:19:16 PM »
you have 1/6 ratio if its 12 and 72 pulleys, you also need to know if its a 1.8 degree  stepper you have and also what the microstepping is set to, maybe that is what you were meaning by the 1/8?

Hood
Re: 4th Axis calculate steps ?
« Reply #3 on: February 10, 2013, 03:53:49 AM »
Hello Brett..Hello Hood.

Ok let´s start again ...the values I posted are not correct. I was going by description of the 4.th Axis. But the pulleys are different.

Ok Restart. One pulley got 17 teeth and the pulley on the spindle got 127 teeth. I counted by myself this morning  ;D

OK my calculation was this diameter of the big pulley 82,19mm dia from the small pulley 11,00

If my calculation is correct , we got a ratio of 7.47 . Is this right ?
Now  200*8*7,47 /360=33,2

Is this correct ? 

Now my question is , The value of 33,2, is this the value to set in the A-Axis Motortuning as Steps ????  But this are degrees or not and in the Stepsfolder Mach requires mm ...or not?


Thank you

Regards


Offline Hood

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Re: 4th Axis calculate steps ?
« Reply #4 on: February 10, 2013, 04:12:24 AM »
You dont need bother working out the diameter of the pulley as all you need to do is divide the teeth on big by teeth on small, much easier :)

Ok your calcs are correct and yes it is degrees in motor tuning if you have the axis set as a rotational. It says Steps per unit and in this case a Unit is degrees.
Hood
Re: 4th Axis calculate steps ?
« Reply #5 on: February 10, 2013, 05:19:04 AM »
Hello Hood,

Ok thank you for the tip.

Tell me , how can I set the Axis as rotational ???

Gio

Offline Hood

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Re: 4th Axis calculate steps ?
« Reply #6 on: February 10, 2013, 05:30:07 AM »
It is likely set that way as that is default but its on General Config page on the left hand side.
Hood
Re: 4th Axis calculate steps ?
« Reply #7 on: February 12, 2013, 05:33:18 AM »
Hello Hood ,

Ok Thank you.  I will try this as soon as I got the cable fixed to the controler.... ;D

I got an other question to you...I will write you in PM

regards