I expected that the movement of an axis would start slowly, become faster and then run at a constant speed when reaching the maximum speed, then slow down slowly and arrive at the target point at the lowest speed.
At my DIY machine, however, I achieve a constant, very low speed at the beginning, then jumpy change to the maximum speed, finally a also jumpy change to the low speed, which also happens at the beginning.
I've been working on the Marlin settings for days, but I haven't had the slightest success.
Why don't I get any rising and falling ramps, why the sudden change?
These are my current Marlin settings:
G21 ; Units in mm M149 C ; Units in Celsius Filament settings: Disabled M200 D1.75 M200 T1 D1.75 M200 D0 Steps per unit: M92 X800.00 Y640.00 Z800.00 E500.00 Maximum feedrates (units/s): M203 X200.00 Y200.00 Z12.00 E25.00 Maximum Acceleration (units/s2): M201 X5000 Y5000 Z1000 E10000 Acceleration (units/s2): P<print_accel> R<retract_accel> T<travel_accel> M204 P3000.00 R3000.00 T3000.00 Advanced: S<min_feedrate> T<min_travel_feedrate> B<min_segment_time_ms> X<max_xy_jerk> Z<max_z_jerk> E<max_e_jerk> M205 S0.00 T1000.00 B20000 X10.00 Y10.00 Z1.00 E5.00
What's the secret of a beautiful ramp?