Motors move too slowly - unresolved

[Gato Richy]

Finally, I'm testing with Gcodes. First, a circule. I used the wizard for it.

But....the motion is real slow, I wonder how to speed up the gcode for testing. I used gcode long time ago, but I'm out of practice. I used F (for feed) and nothing seems to speed up, so I wonder if there is funtion in Mach3 to give more speed, I mean no jogging speed, because jogging is faster.

Thanks

[PEU]

Gato, tune your motors in mach 3, then to move the axis, say with the cursors or the virtual pendant, press shift while moving, this will make mach3 to move at rapid speed instead of the dialed feedrate.

Si no se entiende te lo explico en español

[Gato Richy]

I would like to speed up testing trying to raise the the feed rate, by moving Mach3 feed rate, it does a little speed. But modifying Gcode I can't, is there a special funtion for it?

[Gerald D]

What is your jog speed? (The number in the Motor Tuning).

What does your g-code look like?

[Gato Richy]

Originally Posted by Gerald D

What is your jog speed? (The number in the Motor Tuning).

What does your g-code look like?

14.34/9000/500/0,05/1/0

Gcode
F400
G21
G00 Z10
G00 X249.4 Y200
G00 Z1
G01 Z-10 F2000
G02 X249.4 Y200 I-149.4 J0 F1000
G01 Z-11.9 F2000
G02 X249.4 Y200 I-149.4 J0 F1000
G00 Z10
G00 X249.5 Y200
G01 Z-11 F400
G01 Z-12 F400
G03 X249.5 Y200 I-149.5 J0 F1000
G00 Z10
G00 X100 Y200
M30

Thanks

[Gerald D]

The 14.34 in the motor tuning looks very low, but that is not the whole problem. (what gear will you put on your motors? how many teeth? what pitch/module?)

The fastest speed you have in the g-code is the F2000 for 2 of the z-moves. The fastest X/Y=move is at F1000. (the first XY-move is only at F400)

The F numbers are millimeters per minute. You have the MotorTuning/Jog speed set at 9000 mm per minute, but your g-code speeds for x&y are only 1000 mm per minute.

[PEU]

The "Steps per" value is waay to low, as G. suggested, try putting there something like 1000. Then go to the settings screens and calibrate the axis using the "set steps per unit" button on the lower left side of the screen.
Tell mach to move the selected axis say 100 units (mm) and then measure how much it moved, enter this value and voila! axis is tuned.
You can do this again until you get pretty close to the value you entered, at somepoint it will ping-pong within two values.

Buena Suerte!

[Gato Richy]

Originally Posted by Gerald D

The 14.34 in the motor tuning looks very low, but that is not the whole problem. (what gear will you put on your motors? how many teeth? what pitch/module?)

The fastest speed you have in the g-code is the F2000 for 2 of the z-moves. The fastest X/Y=move is at F1000. (the first XY-move is only at F400)

The F numbers are millimeters per minute. You have the MotorTuning/Jog speed set at 9000 mm per minute, but your g-code speeds for x&y are only 1000 mm per minute.

14.34 is the math I found in other Thread. Gears are 35 teeth and 20 pitch. No reduction.

Thanks

[Gato Richy]

Originally Posted by PEU

The "Steps per" value is waay to low, as G. suggested, try putting there something like 1000. Then go to the settings screens and calibrate the axis using the "set steps per unit" button on the lower left side of the screen.
Tell mach to move the selected axis say 100 units (mm) and then measure how much it moved, enter this value and voila! axis is tuned.
You can do this again until you get pretty close to the value you entered, at somepoint it will ping-pong within two values.

Buena Suerte!

Hola Pablo, that value came up from the math. I may use a higher value but axis are calibrated to that value and higher may not be tuned properly. Any way I will try what you suggest.

Gracias Amigo

[Kobus_Joubert]

I suggest using a longer distance for the calibration as per
Pablo in post #21. I was using this same method and then found that it was not 100% accurate on longer distances....so use this Mach3 tool, but calibrate it....go for about the max length and width that your table can go

[Gerald D]

Okay, your maths is correct. (35tooth is too big for a direct drive motor if you want to cut wood. It may be okay for very soft material)

Try the following G-code:

F5000
G21
G00 Z10
G00 X249.4 Y200
G00 Z1
G01 Z-10 F5000
G02 X249.4 Y200 I-149.4 J0 F5000
G01 Z-11.9 F5000
G02 X249.4 Y200 I-149.4 J0 F5000
G00 Z10
G00 X249.5 Y200
G01 Z-11 F5000
G01 Z-12 F5000
G03 X249.5 Y200 I-149.5 J0 F5000
G00 Z10
G00 X100 Y200
M30