# Thread: Mach 3 Configuration Steps per unit

1. ## Mach 3 Configuration Steps per unit

Hi, I'm really confuse with this, I read the manuals and the videos but can't solve it.

http://cgi.ebay.co.uk/ws/eBayISAPI.d...m=330287884711

2)Micro step is set to 1/4 in drivers

3)Motors are NEMA 23

4)The motor is are directly coupled to the lead screw

which "Steps per" I should use in mach 3?

Should I use Inches instead of mm in the "Default Units" becasue of my setup?

Many Thanks

2. Steps/Unit= 200 *4*10=8000 steps/unit

3. ## Steps/per unit calculations.

Originally Posted by andycorleone
Hi, I'm really confuse with this, I read the manuals and the videos but can't solve it.

http://cgi.ebay.co.uk/ws/eBayISAPI.d...m=330287884711

2)Micro step is set to 1/4 in drivers

3)Motors are NEMA 23

4)The motor is are directly coupled to the lead screw

which "Steps per" I should use in mach 3?

Should I use Inches instead of mm in the "Default Units" becasue of my setup?

Many Thanks
Asuming a 200step per rev motor.
10tpi x 200 step per rev of the motor = 2000full steps/inch. x 4 (1/4 steps) = 8000 1/4steps/inch.
divided by 25.4 mm/inch = 314.96062992125984251968503937008 steps/mm
If my math is right, and I am sure somebody will correct me if I am wrong.

There is also a utility in Mach3 that says input a distance and then measure how far it actually went. It calculates the proper steps for you. It is under one of the set up tabs but I can't remember which at the moment.

4. Thanks look like it works I did a circle test with 8000 and measured and to me is perfect.
Many thanks

• Very good! Now you need to measure the ACTUAL axis travel vs the travel that Mach indicates. If these are not equal, (due to mechanical inaccuracies) then you will need to tweak the steps up or down slightly. UP if distance traveled is LESS than indicated, DOWN if distance is MORE.

CR.

• #### Posting Permissions

We are the largest and most active discussion forum from DIY CNC Machines to the Cad/Cam software to run them. The site is 100% free to join and use, so join today!