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Messages - Slmitch

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1
General Mach Discussion / Re: z axis problem
« on: November 04, 2017, 08:58:31 AM »
Hi Craig
1st, Thank You for all the info, it is very much appreciated.
I will be reading it carefully in the next few days.
I also have a bunch of family commitments coming up, so I will be away for a little while. I will be back in contact when as soon as I can.
Again thanks
Cheers
Steve

2
General Mach Discussion / Re: z axis problem
« on: November 03, 2017, 07:59:55 PM »
Thanks for your replies and info
Unfortunately this is just a small homemade cnc, so I don't have much info for the drivers and motors. As I read through the similar posts, I really think it hit the mark. I tried changing the DIR and Step to active low, but saw no change. I did find it changed the motor speed, direction, etc. I would love to pick some ones brain that has a handle on all the ins and outs of this part of the cnc system, but that is for another time
I  was in the process of trying to run the step motors with the highest and lowest step settings, to see if I could see a difference. But, of course, I had a small disaster and all testing has stopped.
I nearly have things back together, but in the mean time do you have any suggestions as to how or what I can do to pin point the problem and hopefully solve it. Please bear in mind  I have a limit experience with the electronics/software end of things, but I am always up for learning something new.
Again thanks for every ones input.
Cheers
Steve

3
General Mach Discussion / z axis problem
« on: November 02, 2017, 06:09:55 PM »
Hello
I have a home built CNC using Mach3 and I recently decided to upgrade the z axis on my machine as I always felt the Stepper motor was working too hard. So I redesigned this part of my system and upgraded from 17 to 23 stepper motor. now I have a problem I cannot figure out.
As I run the machine the z axis slowly and consistently gains height and after a while the bit is no longer cutting.
I have tried everything from changing back to 17 motors, to changing the step count, to changing to max current to the motors, changing the Hrz from the computer, changing the microsteps, accelaeration, velocity. It is a very consistant and smooth rise so that I can't see it being mechanical, it is like I am loosing a step at each change of the z axis? The g code is something I used before and never had this problem.
Any suggestions or ideas would be most appreciated
Thanks
Steve

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