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help please
« on: March 26, 2011, 12:27:58 AM »
OK, I just finish seting up my CNC router only ting im having trouble is MOTOR TUNNING. I have the TB6560 driver with 3 200oz 1.8 degree stepper motors and /8" 12" (turn per inch) acme ,single start carbon steel +/- .009 in./ft.max lead screw. I'm trying to configure the motor tuning page in Mach3. I been searching and reading in the forum on how to tune the motor but could not find how to calculate the step per.etc... not sure how to obtain or calculate it. Any help will be great.  wen i tell the machine to move 10" inch it moves 10 cm ?
im using mach3.

Offline Tweakie.CNC

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Re: help please
« Reply #1 on: March 26, 2011, 03:03:33 AM »
Hi,

Not sure exactly what the pitch (turns per inch) is for your leadscrews but Al Lenz made a nice calculator which you can download from here http://www.machsupport.com/forum/index.php/topic,16315.msg110286.html#msg110286

Tweakie.
Success consists of going from failure to failure without loss of enthusiasm.  Winston Churchill.
Re: help please
« Reply #2 on: March 26, 2011, 01:37:59 PM »
Tweaki thank you for youre reply, please dont let me alone on this one i know if you help me my machine is going to work super fine, i will put some pictures of my mach 3 set up  to see if im messing up all .
Re: help please
« Reply #3 on: March 27, 2011, 12:39:19 PM »
Ok now is cutting rigth i will post the pictures of the set up to, the only problem now is that wen the machine is returning to the home position it start moving slow but only the z axis is moving and moving and moving i have to press the stop button 

Offline Tweakie.CNC

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Re: help please
« Reply #4 on: March 27, 2011, 01:02:21 PM »
I never use the home position but I understand that it homes the Z axis first, have you checked your home switches are working correctly ?

Tweakie.
Success consists of going from failure to failure without loss of enthusiasm.  Winston Churchill.
Re: help please
« Reply #5 on: March 27, 2011, 01:22:46 PM »
I dont have home switchs wen the machine finish cutting it returns to the home position and then  the z axis stars moving  slow

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Re: help please
« Reply #6 on: March 27, 2011, 02:07:38 PM »
Under 'Config' check your homing limits.
Is your GCode finishing with a G28 ?

Tweakie.
Success consists of going from failure to failure without loss of enthusiasm.  Winston Churchill.
Re: help please
« Reply #7 on: March 27, 2011, 04:23:14 PM »
mmmm? i think not, here is the g code

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Re: help please
« Reply #8 on: March 28, 2011, 02:51:44 AM »
I have run the code and nothing wrong there - all my axis return to their start positions.

Tweakie.
Success consists of going from failure to failure without loss of enthusiasm.  Winston Churchill.
Re: help please
« Reply #9 on: March 28, 2011, 05:03:19 PM »
do you think it may be my set up?