Laser engraving with LCNC

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30 Jul 2017 22:27 #96711 by grump
grump created the topic: Laser engraving with LCNC
Hi guys.
On another forum a lot people have asked me about these cheap Chinese laser engravers to the point where I bought one to see if it would do what they want.

www.ebay.co.uk/itm/SuperCarver-NEJE-USB-...p2057872.m2749.l2649

I had always ridiculed them as a dangerous toy but gave in to curiosity and set up a windows PC in preparation for my new experiment.
Without doing a full appraisal of it I will just say that I am not unimpressed with its performance for engraving names in wooden pen barrels and that is what the questionnaires are referring to.

I will do a full appraisal for them on their forum, but now I am keen to put one of these modules on my little 3020T to give me a larger area to print in.

Having done a search of the forum and tinterweb in general I cant find good guide to show me how best to go about it. Could someone either point me in the right direction or guide me through it?

The fitting and hard wiring is not an issue nor is what I will be using, I have ordered one of these to play with.

www.ebay.co.uk/itm/Focusable-500mw-808nm...p2055119.m1438.l2649


I understand its capabilities and have no intention of trying to cut or deep engrave with it simply to print or pinpoint mark is enough for my purpose and this is easily able to do it.
What I would like assistance with is the connection to LCNC and the switching of it.
From what I have read to date confuses me as to whether I should connect it to the Z axis or try switching through spindle. I attach my current hal and ini file, as you will see I use the fourth axis but still have available pins to chose from.
Thanks in advance for any help


File Attachment:

File Name: my-mill_20...7-30.hal
File Size:3 KB

File Attachment:

File Name: my-mill_20...7-30.ini
File Size:3 KB
Attachments:
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01 Aug 2017 23:08 #96866 by andypugh
andypugh replied the topic: Laser engraving with LCNC

grump wrote: From what I have read to date confuses me as to whether I should connect it to the Z axis or try switching through spindle. I attach my current hal and ini file, as you will see I use the fourth axis but still have available pins to chose from.


I would suggest using a G-code analogue output and M67.
linuxcnc.org/docs/2.7/html/gcode/m-code.html#mcode:m67

I am perturbed by the absence of any sort of laser safety shielding.
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02 Aug 2017 08:49 #96885 by grump
grump replied the topic: Laser engraving with LCNC

I am perturbed by the absence of any sort of laser safety shielding.


Hopefully the supplied safety glasses are enough, this thing barely replaces a pencil in fact I can cut deeper and neater with a pencil but I can't draw like this does.

Thanks for the reply I'll have a look at the link.
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02 Aug 2017 11:46 #96897 by andypugh
andypugh replied the topic: Laser engraving with LCNC

grump wrote: Hopefully the supplied safety glasses are enough, this thing barely replaces a pencil in fact I can cut deeper and neater with a pencil but I can't draw like this does.


And being stabbed in the eye with a pencil isn't great either.
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02 Aug 2017 14:57 #96918 by grump
grump replied the topic: Laser engraving with LCNC

And being stabbed in the eye with a pencil isn't great either.


So that's what the glasses are for?
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