diff --git a/Core/Inc/pse_stepper_planer.h b/Core/Inc/pse_stepper_planer.h
index 03df290..6fd2b82 100644
--- a/Core/Inc/pse_stepper_planer.h
+++ b/Core/Inc/pse_stepper_planer.h
@@ -12,7 +12,7 @@
 
 #define PSE_STEPPER_INTERRUPT_RATE 20000 // 64Mhz (Presc 64, count 50) : 20kHz
 #define PSE_STEPPER_SCREW_PITCH 1000 // M6 : 1000µm / rotation
-#define PSE_STEPPER_STEPS_PER_ROTATION 6400 // NEMA17 200 steps/rotation with 32x microstepping
+#define PSE_STEPPER_STEPS_PER_ROTATION 3200 // NEMA17 200 steps/rotation with 16x microstepping
 
 void pse_sp_start_axis(pse_stepper_conf* conf);
 void pse_sp_stop_axis(pse_stepper_conf* conf);