# Corexy help

Posted by Taz-dig
 Corexy help September 11, 2015 09:36PM Registered: 8 years ago Posts: 45
I am about to start my corexy printer. One thing I do not km now is how to set the steps for x and y I have a 1.8 deg stepper and I am driving the printer with 1/16 steps. I don't have a belt, I have spectra line running on the printer. So how would I calculate the steps per drive on these two motors?

Digs
 Re: Corexy help September 11, 2015 10:33PM Registered: 9 years ago Posts: 346
You can always just start with 90 step / mm and then you ask it to move and measure how much it moved.

Say you asked it to move 100 mm and it moved 75mm then you do:

New steps pr mm= 90 * 100/75

As per the equation:

NEW_STEPS_PR_MM = OLD_STEPS_PR_MM * IDEAL_MOVE / REAL_MOVE

Alternatively, you need to measure the diameter of the pulley with the spectra-line and calculate the circumference ( O ) . Then you say: 16 * 360 / (O* 1.8)

The equation being: NEW_STEPS_PR_MM = MICROSTEPS * 360 / ( CIRCUMFERENCE * DEG_PR_STEP)
 Re: Corexy help September 12, 2015 11:45AM Registered: 8 years ago Posts: 45
Thanks Larsk,

I made the change with calculating the steps based in the diameter for start, it sounds a lot better and runs smooth. Now to calibrate and begin the fun.
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