Need advise to solve problem

[Samotras]

Hi , 

After most of search i can not resolve my problem, any advise much appropriate .

Some information :

Firmware : Marlin 

Host software : Pronterface

Slicer : Slic3r

Y Axis Motor Nema 23 19.5 Kg 2.2Amp

Moro drive : DIV268N - 5A

All wire cheked : OK

Step : Full Step

In firmware :

#define DEFAULT_AXIS_STEPS_PER_UNIT   {80.0000, 640.0000, 320.0000, 28.5000, 28.5000,80.0000 }

#define DEFAULT_MAX_FEEDRATE          {5000, 500, 2000, 23,}

#define DEFAULT_MAX_ACCELERATION      {1000, 1000, 300, 2000, 2000}

in Y Aaxis using Leadscrew 1.25mm pitch

All Setting for feedrate , acceleration , jerk , step_mm , etc. im change and store in eeprom

In general in pronterface X/Y set to 3000 mm/min , in slic3r Travel speed set to 60 mm/s for fast print 

I CAN NOT RUN MY Y AXIS MORE THAN  400mm/min on Y axis in pronterface , if go more than 400mm/min motor not moving and making loud sound

convert mm/min to mm/s 

400 mm/min = 6.6mm/s 

Fast print = 60 mm/s

Normal = 50 mm/s

Slow = 40 mm/s

My machine = 6.6mm/s !!!!

and i have this problem only in my Y axis with such motor .

where problem is shows , slicer make G-code set F depence on speed and Y axis on my machine can not handle such speed .  .

I change motor same result , check electrical board circute it is fine , change stepper driver same result , checked wit A4988 max v and DRV8825 ,max V same result .

changed DEFAULT_MAX_ACCELERATION for Y axis from 10mm/s^2 to 100mm/s^2 no change .

Jerk changing from 1 to 20 nothing change . 

replace motor with nema 23 29.5 Kg same result . 

Nema 17 same result

i really dont know what shall i do to fix this issue .

[Triffid Hunter]

Have you replaced your Y axis belts with a leadscrew? Perhaps having your Y steps/mm set to 640 instead of 80 might have something to do with it...

Furthermore, 80 steps/mm is for x16 microstepping (given 20Tx2mm pulleys and 200 step motors), if you go full step it's more like 5 steps/mm...

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