Please look at theese settings

[freddeifk]

katta.gif (9.73 KiB) Viewed 5791 times

kat 1.jpg (28.17 KiB) Viewed 5791 times

grbl.GIF (51.37 KiB) Viewed 5791 times

I am just testing too laser angrave a photo i download , (i have tried 2 different photos, but it is about same)

i hava a shapeoko 2 with Jtechs 2,8 w laser and the jtechs grbl 0.9 and use picsender too send the gcodes.

the engravings are on Birch ply , and the laser burns the Wood just too much i Think,its just nearly black and soot if i touch my fingers on the engraving.

i use pwm Control , solder a wire too pin 11 and ground 14, i hope the pwm are working ass it should ?

the first attempts i used feedrating 1000mm/min and the seccond attempt i used 2500 mm/min , but i did not see much difference between them.
and set max laser value 255 And min 10 and use GRBL .

Is there any real problem in my grbl settings ?
and what can i try too do to get abetter engraving ?

[Picengravertoo]

Try changing to these settings.

$110=7650.000 (x max rate, mm/min)
$111=7650.000 (y max rate, mm/min)

[freddeifk]

Ok i Will try, what difference Will that settings do to My engravings ?

[Picengravertoo]

Those settings are limiting the X&Y axis feedrate to 500mm/min and that is why it's burning real dark.

Post your PicLaser settings here for us to look at also.

[freddeifk]

pic.GIF (30.9 KiB) Viewed 5777 times

[Picengravertoo]

The Start Comment should be ( and End Comment should be )

Everything else looks OK, but I wonder if the 1 Start & End Comments is causing an issue with grbl.

Also add a G90 G94 to the PreCode Commands.

[freddeifk]

Hi picengravertoo,

I changed all the settings you Said,
And now the cat was just fine,
But the shapeoko machine was nerly going too fast so it was wibrating a lot,

Thankyou for all your help,

[Picengravertoo]

I laser engrave photos at 200IPM (5080mm/min) with our Shapeoko 2 using a 6W laser Diode. That is with our PicEngrave Pro 5 and it has an Extended Edge feature to slow down the feedrate when reversing direction.

Jeff

[freddeifk]

If i wants too engrave a softer wood for example cedar,
Shall i speed up the shapeoko even moore or can i adjust the height on the z axis ?

I tried on a cedar scrap wood and it was not wery good,
The birch play i tried was wery good

[freddeifk]

Or is it a good ide too set down the Max laser value too set down tha hard burning