configuration before printing

eeerfan

Hi dears

i'm try to make my own 3d printer.before complete the project and testing,i think i must config my step motors by changing step_units,when i calculate step per unit(mm) i reach this number (19.6850) but this number dos not config my stepper motor correctly,but when i product this number to 10(19.6850*10=196.85) and add to configuration all of things are ok and machine works correctly.

my question is that,why the number must product to 10 in full step controlls?

Repetier

How do you come to 19.6850? Maybe there is an error that factor 10 corrects. 20 steps per mm is very low resultion and totally unusual.

eeerfan

based on this tutorial:

StepsPerTurn = 400 // Most stepper motors have 0.9 Degree per step
BeltDistance = 2.032mm // Distance between repeating grooves. GT2 belt = 2.032mm
GroovesInPulley = 10 // 8-10 are common values---> FOR ME IS 10
Substepping = 1//for a full step needed
StepsPerMM = StepsPerTurn*Substepping/(BeltDistance**GroovesInPulley)
           = 400*1/(2.032*10) = 19.6850

strips

With full steps 20 sounds mathematically reasonable. I have 160 steps on my X with 1/16 microstepping.

I would look into microstepping if I were you. What stepper drivers are you using?

based on this tutorial:

StepsPerTurn = 400 // Most stepper motors have 0.9 Degree per step
BeltDistance = 2.032mm // Distance between repeating grooves. GT2 belt = 2.032mm
GroovesInPulley = 10 // 8-10 are common values---> FOR ME IS 10
Substepping = 1//for a full step needed
StepsPerMM = StepsPerTurn*Substepping/(BeltDistance**GroovesInPulley)
           = 400*1/(2.032*10) = 19.6850

eeerfan

drv 8825