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« on: July 17, 2013, 05:52:03 AM »
You are absolutely correct of course. I have changed my stepper driver to 1/8th step. therefore have now 1600 steps per rev on my motor and 4800 steps per rev on my axis which gives me 13.33 steps per degree rotation.However I have set my a axis to linear as opposed to angular for carving in the round.
What I had failed to take into consideration is that I am using a timing belt to drive my axis which has a 5mm pitch so the result of one rotation of my axis is a linear move of 300 mm.(20 tooth pulley on my motor and 60 tooth pulley on my axis). so as I understand it I have to set my steps to 16 steps per mm i.e. 4800/300=16.
This dosen't seem very practical so i may have to rethink my gearing arrangement and use a timing belt with a smaller pitch. I have tried the 16 steps per mm but this results in lots of lost steps. I have not much experience in what might be the best velocity and accelleration settings should be, so it is trial and error for me.
Do you have any suggestions? By the number of posts I see youv'e made you must have lots of experience. again thanks for your interest in my post and putting me on the right track.
I'm getting a bit long in the tooth now, not as quick as i used to be. However will get there in the end.
Bill Cameron