CIRCLES ARE OVAL? (3 replies)

I'm having problems. I'm printing oval pulley gears instead of circle pulley gears! I'm trying to print CIRCLE Pulleys

I never had this problem until I went from a 8tooth pulley to a 18tooth pulley for BOTH X and Y on my reprap

^{But, this only started right after I purchased the
"---->T2.5 Aluminum Timing Pulley 18T + Timing Belt 3m for RepRap<-----".
So, Originally I had ABS Plastic pulleys with 8 teeth now I have 18 teeth......Here is where the problem prints begun!!!;-(}

My setup is
Sanguinololu 1.3a
Sprinter Software for the boot
with reprap setup
using the 1.8 steppers which are nema 17 stepper motors I believe

In the Sprinter (Config.h) File Page these are my settings BELOW
//// Calibration variables
// X, Y, Z, E steps per unit - Metric Prusa Mendel with Wade extruder:
#define _AXIS_STEP_PER_UNIT {80, 80, 3200/1.25,700} _{I Still need to change the {X,Y where it is {80,80}
// Metric Prusa Mendel with Makergear geared stepper extruder:
//#define _AXIS_STEP_PER_UNIT {80,80,3200/1.25,1380}
// MakerGear Hybrid Prusa Mendel:
// Z axis value is for .9 stepper is 4545.4544(if you have 1.8 steppers for Z, you need to use 2272.7272)
//#define _AXIS_STEP_PER_UNIT {104.987, 104.987, 2272.7272, 1487}

I Figured the settings I would have to change would be for the X and Y numbers which are both (80) for both X and Y to some other number setting.That is where I needed HELP for the calculation and how it would be determend to correct the oval printing problem I have. Any help would be greatly Appreciated;-)

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