LaserUser.com Forum (formerly RDWorksLab)

Posted: **Sat Jul 25, 2020**

I am new to laser engraving and am having trouble getting uniform lines. Every other line seems to be offset. I am engraving 1/4in cast acrylic. Running the newest version of RDworks. 50w China Blue 500mms @ 15%. Thank you.

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Posted: **Sat Jul 25, 2020**

you have set a too high speed and not set correctly the "reverse interval".

at 500mm/s, your tube has a 1ms response time, so this is 0.5mm. when scanning you engrave one line from left to right, then the head returns from right to left and engrave the line below.

with this settings, if the mainboard sends the start/stop signal exactly at the good moment, the LTR will "draw" 0.5mm more to the right, and when returning, you will miss also 0.5mm, and your lines will be "offset" like the schema below

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so, you have to set the "reverse interval" for the speed, which will be used by the mainboard to correct your problem. obviously, the higher the speed, the more the reverse interval must be.

here is a complete tutorial on how and why set those parameters

https://cartonus.com/how-to-improve-eng ... r-machine/

Posted: **Wed Jul 29, 2020**

sebastien laforet wrote: Sat Jul 25, 2020 you have set a too high speed and not set correctly the "reverse interval".

at 500mm/s, your tube has a 1ms response time, so this is 0.5mm. when scanning you engrave one line from left to right, then the head returns from right to left and engrave the line below.

with this settings, if the mainboard sends the start/stop signal exactly at the good moment, the LTR will "draw" 0.5mm more to the right, and when returning, you will miss also 0.5mm, and your lines will be "offset" like the schema below
Code: Select all
 -----
----- 
 -----
----- 
 
so, you have to set the "reverse interval" for the speed, which will be used by the mainboard to correct your problem. obviously, the higher the speed, the more the reverse interval must be.

here is a complete tutorial on how and why set those parameters

https://cartonus.com/how-to-improve-eng ... r-machine/

You were spot on thank you for the help! Still getting it tweaked in there, but already way better!

LaserUser.com Forum (formerly RDWorksLab)

Offset Lines?

Offset Lines?

Re: Offset Lines?

Re: Offset Lines?