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Laser wont cut through corners
Posted: Tue Mar 02, 2021
by Evan Winn
Hi all
I am a having some serious trouble with my laser cutter. It does not completely cut out shapes. It fails to return fully to where it started. I cut acrylic letters for signs and am going through material wasting cuts. Please help!
Thanks!
Re: Laser wont cut through corners
Posted: Tue Mar 02, 2021
by Pete Cyr
viewtopic.php?f=105&t=3562&hilit=Revers ... val#p20509
Recommend you review and perform the check in the links
Re: Laser wont cut through corners
Posted: Wed Mar 03, 2021
by Evan Winn
Here is a pic of the backside which is not cutting all the way. From the face of the letter it appears to be cut but the reverse tells another story.
Re: Laser wont cut through corners
Posted: Wed Mar 03, 2021
by Pete Cyr
Did you perform the checks I recommended.
Try a pulse burn test with the table up and then lower the table 3-4”. I suspect your beam is coming out of the tube on an angle vice perpendicular to the table. When doing the burn test do not move the target that is being burned... if I am correct the 2nd pulse will be off center from the original pulse.
Re: Laser wont cut through corners
Posted: Thu Mar 04, 2021
by Eric Adams
I agree with Pete - looks to me like your beam is angled. If you have acrylic, turn a piece on edge and pulse into it from its side and then see if it's square/perpendicular. Rotate the acrylic 90 degrees and see if it's square in both directions.
Re: Laser wont cut through corners
Posted: Thu Mar 04, 2021
by Evan Winn
Pete Cyr wrote: Wed Mar 03, 2021
Did you perform the checks I recommended.
Try a pulse burn test with the table up and then lower the table 3-4”. I suspect your beam is coming out of the tube on an angle vice perpendicular to the table. When doing the burn test do not move the target that is being burned... if I am correct the 2nd pulse will be off center from the original pulse.
Hi Pete, I did attempt the changes however the value would remain at 100 in both the Graph length and Measuring Length fields. I click READ, open the step length settings, type in 99.4 in both fields in the x axis (because it was long on my 100mm test cut.) But when I double check after clicking ok then WRITE the values have reverted back to 100.
Re: Laser wont cut through corners
Posted: Thu Mar 04, 2021
by Pete Cyr
Evan Winn wrote: Thu Mar 04, 2021
Pete Cyr wrote: Wed Mar 03, 2021
Roger on the length checks- did you do the check for the perpendicularity of the beam to the table?
Re: Laser wont cut through corners
Posted: Thu Mar 04, 2021
by Evan Winn
Affirmative. I performed the beam check. I do not have an adjustable table but I moved the lens tube up and down. It was only ever so slightly off when doing the burn test. I also shot the beam through a piece of clear acrylic and the two were very square with each other.
Re: Laser wont cut through corners
Posted: Thu Mar 04, 2021
by Pete Cyr
Hmmmmmmm
What is your cutting speed.
How long have you had the laser/tube
Did this issue just start
Re: Laser wont cut through corners
Posted: Mon Mar 08, 2021
by Evan Winn
Pete Cyr wrote: Thu Mar 04, 2021
Hmmmmmmm
What is your cutting speed.
How long have you had the laser/tube
Did this issue just start
Hey Pete, hope you had a good weekend.
I've had the laser 4 years now. The tube itself has a manufacturer's date of 2014.
This is a very recent problem, only when cutting half inch.
I run 4 mm/s at 50% power on 150w, These are my regular all the time settings. I have had to increase the power and have achieved ideal cuts, but that might tell me my tube is getting old.