Speed parameters not responding

[Biniecki]

I am using an Eleksmaker A3 2.5W laser engraver running GRBL 1.1f. I downloaded a trial of your software and having issues adjusting speed. I have tried engraving at different speeds but the laser always travels at the same speed. I can not get it to speed up or slow down. I am currently using T2 and can adjust the speed without a problem. Here is a copy of my current parameters

Grbl 1.1f Ready
$0=10 Step pulse, microseconds (10)
$1=25 Step idle delay, milliseconds (25)
$2=0 Step port invert, mask (0)
$3=0 Direction port invert, mask (0)
$4=0 Step enable invert, boolean (0)
$5=0 Limit pins invert, boolean (0)
$6=0 Probe pin invert, boolean (0)
$10=1 Status report, mask (1)
$11=0.010 Junction deviation, mm (0.020)
$12=0.002 Arc tolerance, mm (0.020)
$13=0 Report inches, boolean (0)
$20=0 Soft limits, boolean (0)
$21=0 Hard limits, boolean (0)
$22=0 Homing cycle, boolean (0)
$23=0 Homing dir invert, mask (0)
$24=100.000 Homing feed, mm/min (100.000)
$25=1000.000 Homing seek, mm/min (1000.000)
$26=250 Homing debounce, milliseconds (250)
$27=1.000 Homing pull-off, mm (1.000)
$30=255 Max spindle speed, RPM (255)
$31=0 Min spindle speed, RPM (0)
$32=1 Laser mode, boolean (1)
$100=80.000 X steps/mm (80.000)
$101=80.000 Y steps/mm (80.000)
$102=80.000 Z steps/mm (80.000)
$110=4000.000 X Max rate, mm/min (5000.000)
$111=4000.000 Y Max rate, mm/min (5000.000)
$112=6000.000 Z Max rate, mm/min (5000.000)
$120=800.000 X Acceleration, mm/sec^2 (800.000)
$121=800.000 Y Acceleration, mm/sec^2 (800.000)
$122=5000.000 Z Acceleration, mm/sec^2 (5000.000)
$130=400.000 X Max travel, mm (400)
$131=300.000 Y Max travel, mm (300)
$132=200.000 Z Max travel, mm (200)

[Rick (Technical Evangelist)]

Your firmware is set to 4000.000 mm/min or 66.66 mm/sec max travel speed for your X and Y. The quote below was for settings of 6000.00 mm/min or 100.00 mm/sec max travel speed for the X and Y.

@LightBurn

The $110 and $111 settings in GRBL are the maximum travel speed for the device. You might be able to increase those to get faster moves, but you’re going to hit the processing speed of the Mana SE shortly, if you haven’t already. It’s an 8 bit ATMega processor (like an 8 bit Arduino) so it’s just not very fast.

Laser engraving photos requires processing a lot of GCode very quickly.

[LightBurn (Oz)]

Are your speeds in LightBurn still set to the default mm/sec, or have you changed them to mm/min? If not, and using the same raw numbers you use in T2, you’d be trying to run your machine 60x faster, and it would cap at your max speed.

[Biniecki]

Thanks. I believe you are correct. I am use to the mm/min with T2 and need to change the lightburn to use that instead of mm/s