Change feed rate

LightBurn Software Questions
1

here is a copy of my code -
how to go about a feed rate change -
current feed rate is " G1 X-8.894S500 F3000 "
change feed rate to F1200 -
show me how to configure please …

; LightBurn 1.4.04
; GRBL device profile, current position
; Bounds: X-4.45 Y-128.87 to X4.45 Y128.87
G00 G17 G40 G21 G54
G91
M4
; Cut @ 50 mm/sec, 50% power
M8
G0 X4.447Y105.804
; Layer C01
G1 X-8.894S500F3000
G1 Y-211.608
G1 X8.894
G1 Y211.608
M9
G1 S0
M5
; return to starting pos
G0 X-4.447Y-105.804
M2

2

Change it in cuts/layers, or are your wanting to change max. feed rate of motors.Or in console if you are trying to modify code.

3

I am looking to put some limits on the stepper motors …
The G00 and G01 are way to strong …
you can feel them jerk the frame when changing directions …
they are right on the verge of missing steps …
In rotary , they will make the part slide …

4

Don’t fool around with the gcode, that’s just asking for it… You want the machine to do all the dirty work.

The issue here is the axes acceleration. This can be lowered in your controller.

image
image1660×275 29.9 KB

I’d suggest that you start by just lowering your existing values by about 10% …

Always make a backup of the configuration before tweaking anything.

:smile_cat:

5

Have looked i believe everywhere in LB and have not seen this …

6

Would be in edit > machine settings.

7

Could this be hidden in machine settings ?
Pretty sure no axis acceleration available .
Will look it over again when at the machine tomorrow …

8

Will need to click on output setup.
image

9

Will look into it tomorrow and get back to the forum …
Thanks guys !!!

10

If you double the mass on any axes you have to have control over the acceleration. You must be missing it.

What do you get when you do this?

Edit → Machine Settings

You should also be able to change it via the console. Enter $$ should echo all these values.

If you wish to change $120 from it’s current value, you’d enter $120=new-value

:smile_cat:

11

Got her runnun …
thanks !

12

found the machine settings … all is well …
Now I have to get back to thrashing and cooking …
thanks guys !!

13

Do you mind marking the most relevant thread solved solved-icon-filled

Thanks… Have fun :slight_smile:

14

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