Slow speed of the delta 3D printer I'm running a large delta 3D printer with Repetier firmware.

The problem that is irritating me is that the speed of the carriages are too slow, like an old lady that is walking in a football field. When I command G1 Z10, for example, the carriages move with a super low speed. I checked everything but I couldn't find the problem.

Here are the specifics and the current settting of the printer:


electronics : Arduino Due + RADDS 3 42cmo6 6 kg
2.5 A stepper motors for x,y and z axes 
3 TOSHIBA ''TB67S109'' stepper drivers (0.1 resistance, 1/16 mic stepping) 
Vref of drivers: 0.7 V (when I    increase this to 1 volt a weird
sound comes from steppers and the carriages won't move)
number of pulley teeth: 20 
belt pitch: 2
steps per rev: 200
micro stepping: 1/16
steps per mm: 80
Max. travel speed: 300 for X,Y,Z
Homing speed: 100 for X,Y,Z
Travel acceleration: 3000 for X,Y,Z
Print acceleration: 1000 for X,Y,Z


PS: I'm currently calibrating the printer and haven't printed anything yet.
When you command a move such as G1 Z10, you are omitting the speed at which the tool head travels. Without specifying the speed, the speed from the last command or speed setting is used. Frequently, after levelling the bed, the tool head is raised in Z direction with a low speed (movement in Z direction is always much slower than in X or Y direction), if you command a movement after raising the tool head it uses this speed. For faster movement you must include the feedrate, e.g. G1 Z10 F600, now it will accelerate from the initial feedrate (e.g. 300) to 600 during the move. If you want instant speed you set the feedrate first and then move the tool head:

G1 F600
G1 Z10