ratio stepper Cross-slide lead screw (X)

[Oxbow6]

Hi
I have the following question, and this are my first Stepper konfiguration
I have now also built myself an H5 controller.
Unfortunately, the rato is not correct.
When I move the sledse with the keyboard 1mm, then the sledse sleds moves only 0.48mm instead of 1.00mm
Where and how can I correct this?
I have a Nema 17 stepper in use
Pulse on the stepper module are 1600

Many thanks

Martin

// Cross-slide lead screw (X) parameters.
const long SCREW_X_DU = 12500; // 1.25mm lead screw with 3x reduction in deci-microns (10^-7) of a meter
const long MOTOR_STEPS_X = 2400; // 800 steps at 3x reduction
const long SPEED_START_X = MOTOR_STEPS_X; // Initial speed of a motor, steps / second.
const long ACCELERATION_X = 10 * MOTOR_STEPS_X; // Acceleration of a motor, steps / second ^ 2.
const long SPEED_MANUAL_MOVE_X = 3 * MOTOR_STEPS_X; // Maximum speed of a motor during manual move, steps / second.
const bool INVERT_X = true; // change (true/false) if the carriage moves e.g. "left" when you press "right".
const bool NEEDS_REST_X = false; // Set to false for all kinds of drivers or X will be unlocked when not moving.
const long MAX_TRAVEL_MM_X = 100; // Cross slide doesn't allow to travel more than this in one go, 10cm
const long BACKLASH_DU_X = 1500; // 0.15mm backlash in deci-microns (10^-7 of a meter)
const char NAME_X = 'X'; // Text shown on screen before axis position value, GCode axis name

[kachurovskiy]

Could it be the backlash / deflection in the system and you just need to drop the steps on the driver to 800?

Alternatively change SCREW_X_DU = 12500 to SCREW_X_DU = 6000 since 12500*48/100 = 6000

[Oxbow6]

so now i have set the Driver to 800
now i have when i move 1mm with the H5 Controller on the sledse Display 0.95mm
How i can correct this from 0.95mm to 1.00 at the H5 Software ?
Thanks

[kotovasia5120]

const long BACKLASH_DU_X = 1500; // 0.15mm backlash in deci-microns (10^-7 of a meter)
Doesn't match your real one. Try different values ​​every time you flash it.
There is also such a modification for changing without reflashing.
#242

[kachurovskiy]

Change SCREW_X_DU = 12500 to SCREW_X_DU = 11875