Mirror Laser Engraving 6W LD

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Picengravertoo
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Re: Mirror Laser Engraving 6W LD

Postby Picengravertoo » Sat Jan 14, 2017 7:57 pm

OK, I was not sure what engraving profile your using. Try a different brand mirror? If you noticed, the mirror I used has a white backing.

banjags
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Re: Mirror Laser Engraving 6W LD

Postby banjags » Sat Jan 14, 2017 9:41 pm

I have yet to find a white backed mirror yet. I am assume you are in the states but where did you buy it?

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Re: Mirror Laser Engraving 6W LD

Postby Picengravertoo » Sun Jan 15, 2017 2:49 am

Picengravertoo wrote:I have used varied intensity on allot of mirrors, but I look for the ones with a even white coating on the back. I found these at Dollar Tree for $1 each, but had to go though a stack of them to find good ones.


The one I used to do the ship with the 6W came from Lowe's and it had a gray backing. It was a 12" X 12" wall tile mirror.

https://www.lowes.com/pd/Style-Selectio ... or/1161873

They have beveled edged ones too.

https://www.lowes.com/pd/Style-Selectio ... or/1161875

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Picengraver
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Re: Mirror Laser Engraving 6W LD

Postby Picengraver » Sun Jan 15, 2017 7:32 am

I have used cheap mirrors from dollar stores which have back backings. The pattern you are getting may also be from the machine mechanics/setup. It has to have smooth accurate stepping. At the resolutions we use (~.006") it need no less than an 8 microstep setting.
John

banjags
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Re: Mirror Laser Engraving 6W LD

Postby banjags » Sun Jan 15, 2017 10:29 am

My machine is set to 1/32 stepping. Should I maybe try changing it to 1/8 and adjust my steps per mm.?

Pricing for mirrors down there is definitely way better then canada.

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Re: Mirror Laser Engraving 6W LD

Postby banjags » Sun Jan 15, 2017 2:48 pm

Did these 1 on Dollarama store mirror. Shading is better but the hatching is still there. Must be some ringing or something in the machine.
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Picengraver
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Re: Mirror Laser Engraving 6W LD

Postby Picengraver » Sun Jan 15, 2017 5:20 pm

Nicely done. Does the hatch pattern show up on wood, too?

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Re: Mirror Laser Engraving 6W LD

Postby banjags » Sun Jan 15, 2017 5:35 pm

I have not done much with wood as because I was having no success in wood at all. have to try again.

Should I try changing the stepping to 1/8. I am currently at 1/32

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Re: Mirror Laser Engraving 6W LD

Postby Picengraver » Sun Jan 15, 2017 7:49 pm

I don't know the answer to your question, but if it is not a lot of trouble, you might give it a try. I have never seen any need to use more than 8 microsteps as most stepper motors can not really move accurately more than 8 or 10 microsteps anyway.

Please try using this image for testing. It contains pure color shades and may be easier to help troubleshoot your problem. Do not convert it to JPG format or it will lose the pure shades.
John

EDIT: Well, looks like forum won't attach a BMP file. :( :oops:

Email me at picengrave AT verizon.net and I will send it to you.

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Re: Mirror Laser Engraving 6W LD

Postby banjags » Sun Jan 15, 2017 9:48 pm

Emailed you. I was doing some calculations and 1/8 step with GT2 belts and 20 tooth pulley, 1 step is 0.02mm... I think that is plenty resolution. I think I will give it a shot. Pretty easy to change.


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