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Topics - toromand

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Laser Modules / NEJE 20W Temperature sensor
« on: September 13, 2019, 11:36:43 PM »
Hi, just installed the NEJE 20w laser head to replace a deteriorated 5.5w module. This one has a temperature measurement wire.

I plan to use a precision V-meter to show the working "temperature". Do you know *exactly* how to wire this? Attaching the original illustration.
So what I understand from the image, I need a voltage reference, and my "temp" wire is IO? Then I measure between IO and GND to get values from the table?

Cutting / 5.5w vertical lines recent cutting problem (not wood grain)
« on: August 11, 2019, 04:21:44 AM »
Hi, first some info:
5.5w laser module with low power button on top
L7 control board
40x50 frame machine
T2laser software (great - highly recommend)
1.1e grbl (default)
Now the problem - everything seamed fine for a long time until couple days ago when I noticed significant difference in cutting 3mm plywood horizontally and vertically. Turning the plywood 90deg didn't help - nothing to do with the wood grain.
My horizontal lines cut just fine but vertical seems like the power is "trembling" and the line is kind of perforated, barely through the back side, not fully cut.
I am aware that my laser beam is a bit square (not round) and that vertical lines are wider because of that. Is it possible to make the vertical resolution bigger for the y-axis motors in order to compensate for this as I think this might help?

Also I have noticed that when I use the button on the laser module to additionally lower the beam while positioning the laser - now the difference is less noticeable.

Can my problem be related to the laser power module?

Anyone has a clue?

Cutting / Poplar vs Birch
« on: December 14, 2016, 01:00:42 AM »
Can anyone share experiences with poplar and birch ply compared? I have cut poplar so far, but would like to hear from you if birch is (and how much) harder to cut.

T2 Software Updates / Per axis feed rate
« on: November 29, 2016, 05:06:49 AM »
As T2 Laser already supports cutting (even if it was not the main purpose of it, and we have BCL), it would be nice to support different feed rates for X/Y axis independently. What do you think?

Cutting / HDF/MDF
« on: November 01, 2016, 08:34:16 AM »
Did anyone try to cut HDF/MDF (3-4mm) (regular one used for furniture)
How is it compared to (non-laser) plywood?
Does it really smoke so much as I can read on some websites?

P.S. thin HDF is usually used as a back-pane on furniture, bottom on some drawers, etc....

Cutting / Difference in power X / Y
« on: October 28, 2016, 02:05:45 AM »

My machine is 5.5w DIY A3 with L7 board. At the moment I'm using Zax's T2Laser
I have tried to cut some 3mm poplar plywood, and encountered some strange behavior.
I have found out smaller simple objects (circles and squares) are easier to cut from, say, cloud shaped object. I have managed to cut a circle with 2 passes (speed 200 pow 200)
Also, the X direction cuts much easier then Y direction (It does not have anything to do with the orientation of the wood, as I have tried to rotate the same peace of plywood 90 deg and repeat.
So the overall result is that some parts of a shape (depending on the "amount" of X in it gets cut with, say 2 passes, and other are very hard to cut even after 5 using full power and speed 200-400.
(I watch the beam passing through the bottom so I can see the cutting performance)

BTW my first test, when I assembled the machine were with benbox. Is it possible that the power was bigger with Benbox FW then with GRBL 0.9j / 255 or is it just me imagining?

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