Ultimaker - Marlin acceleration tests
Channel: Florian Horsch
Date: 24/08/2011

Test Gcode provided by Lampmaker. Find the code attached in the bottom. Notice the smooth acceleration. At some points something goes wrong. Sounds like missed steps - not sure what really happens.

### Code ###

M92 E608
G92 E0 
G21    (metric)
G90    (absolute positioning)
G28    (home all axes to min endstops)
G92 X-105 Y-105 Z0.0 E0 (reset position to front/left/z=0)
G1 Z10

M201 X500 Y500 (acceleration at 500 mm/s2)
G1 X90.0 Y90 F16000 (ok)
G1 X-90.0 Y-90
G1 X90.0 Y90 F20000 (ok)
G1 X-90.0 Y-90
G1 X90.0 Y90 F25000  (deceleration is irregular) 
G1 X-90.0 Y-90
G1 X90.0 Y90 F32000  (runs at same speed as  F25000)
G1 X-90.0 Y-90


M201 X2000  Y2000(acceleration at 2000 mm/s2)
G1 X90.0 Y90 F16000  (ok)
G1 X-90.0 Y-90
G1 X90.0 Y90 F20000  (ok)
G1 X-90.0 Y-90
G1 X90.0 Y90 F25000  (Not OK)
G1 X-90.0 Y-90
G1 X90.0 Y90 F32000  (Not OK)
G1 X-90.0 Y-90

M201 X4000  Y4000(acceleration at 4000 mm/s2)
G1 X90.0 Y90 F16000 (ok)
G1 X-90.0 Y-90
G1 X90.0 Y90 F20000 (ok)
G1 X-90.0 Y-90
G1 X90.0 Y90 F25000  (Not OK)
G1 X-90.0 Y-90
G1 X90.0 Y90 F32000   (Not OK)
G1 X-90.0 Y-90


M201 X4000  Y4000(acceleration at 7000 mm/s2)
G1 X90.0 Y90 F16000 (ok)
G1 X-90.0 Y-90
G1 X90.0 Y90 F20000 (ok) 
G1 X-90.0 Y-90
G1 X90.0 Y90 F25000  (Not OK)
G1 X-90.0 Y-90
G1 X90.0 Y90 F32000  (Not OK)
G1 X-90.0 Y-90