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Messages - Landbo

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General Discussion / Re: A3 vs K40
« on: February 08, 2018, 12:24:32 AM »
Depends on your laser wattage.
I think the 2.5w is closer to 9mm

No, 0.9 mm in front of wet black powder.   ;)

T2 Engraving / Re: Need help, odd burn on right side
« on: February 04, 2018, 07:25:36 PM »
Yes, there are four things I can imagine can make you get the result.

1. Missing focus where the burning is not performed.
2. The slate is not so susceptible to burning on the spot, it is a natural matriale.
3. There is an error in the diode electronics or the laser diode is not cooled properly.
4. Power supply is too small the seed does not have a stable output voltage.

I will guess point 2 is the most obvious for mistake. Try and run slower with the laser over that place.

Points 3 and 4 allow you to check and make a long line across a matriale that is more homogeneous to burn. The line must be evenly burned throughout its length. Oak is suitable for such a test.

Regards Leif.

T2 Engraving / Re: Need help, odd burn on right side
« on: February 04, 2018, 04:35:57 AM »
Hmm... Simulation view looks fine.  These burns were both on slate which are both pretty flat.  It's just an odd streaky pattern, but only on the right side, the left side is perfectly fine.

Do you burn in either direction or only when the carriage runs from left to right?

Regards Leif.

General Discussion / Re: Laser Power issue
« on: January 29, 2018, 09:04:29 AM »
Well, I guess I spoke too soon. This morning I was doing a traditional HD logo in T2 and at the start everything seemed OK. But shortly I found it is not OK. What it is doing as it burns at the normal power, when it goes to the next letter or shape it will go dim and then maybe it will be normal again. It is like the power randomly goes from normal to dim. Have any suggestions what it may be. I am assuming it may be hardware.

My guess will be it's your power supply that is weak or too small.

Regards Leif.

Projects / Re: Couples portraits - Brought to you by Dithering
« on: January 10, 2018, 09:21:34 PM »
Not bad, actually really nice. There you've just hit the spot.   :)

Regards Leif.

General Discussion / Re: Technique for Creamic tiles with diode laser
« on: January 05, 2018, 10:06:36 PM »
Yes how beautiful.

Had even thought of trying the same on a white tile, but lack of black spray paint in my house has made it only been at the thought. I have to go to town and buy something.    :D

Regards, Leif.

T2 Engraving / Re: vacation
« on: December 30, 2017, 05:58:49 PM »
Thank you, Zax. Enjoy the trip/holiday and happy new year.    :)

Regards Leif.

Cutting / Re: Cutting Styrene Plastic
« on: December 30, 2017, 05:07:29 PM »
PVC is even worse, it develops at high temperature hydrochloric acid - be careful

Hydrochloric acid as such, is not hazardous to health, provided you do not take a bath in the liquid.

Styrene develops vapor/smoke that is suspected of being highly cancer-inducing. You probably do not notice that before after 10-40 years!   ;)

Happy New Year, Greetings Leif.

General Discussion / Re: Video shows brass inserts, I've got plastic tubes
« on: December 22, 2017, 03:15:31 AM »
The assembly video shows brass threaded inserts before and after the wheel. For spacers.  Ive got back plastic tubing spacers to go on each side of the wheel. What's up with that. How cheap can they go and will they hold up?

Generally, plastic spacers are bad as they are easily tied together, brass spacers are much better. If you do not have brass spacers you can drill some 4mm nuts up with an 5mm drill and use 2-3 pieces in extension. They are almost better than brass spacers.

Merry Christmas, Leif

FAQs For New Users / Re: If you could do it over, what would you buy?
« on: December 13, 2017, 04:58:52 PM »
You should not expect to cut much more than paper, cardboard or thin veneer with a diode laser and achieve a good result. If you need to cut the mentioned matrials, invest in a CO2 laser machine.

My experience with a blue 2.5 watt diode laser on an EleksLaser A3 Pro says it's great for engraving but inconvenient for cutting. Therefore, I also have a K40 CO2 laser that has an output power of 37 W and yet too small to cut an 4 mm birch plywood at once.

Regards Leif.

General Discussion / Re: need help with power of 2watt M140 Laser
« on: December 09, 2017, 05:57:01 AM »
well i have the diode inside a 12mm coper housing well pressed in and then the 12mm housing is inside a Aluminum Housing the and a 4cm Ventilator is blowing al the time so i dont think it was overhaeting....

anyway i get a new one from the Reseller and i will ad a 2nd Ventilator in front of it,,



Yes, it should be cooling enough for a "small" laser diode. Good luck with the replacement.

Regards Leif.

Cutting / Re: Cutting Styrene Plastic
« on: December 08, 2017, 12:57:19 PM »
Has anyone cut Styrene Plastic?

Have not tried.

Will just make you aware that the fumes from a cutting styrene is properly not the most healthy to breathe, so be careful.

Regards Leif.

General Discussion / Re: need help with power of 2watt M140 Laser
« on: December 08, 2017, 12:40:25 PM »
well after setting up a new TTL Board the laser is not working it is not burning anymore there is a blue light and on starting a burnjob it goes high for a second then its only a soft light with no power ..the Board is setup with 4.9 volt and on the Testload the AMP was 1.6 A i think this diode was faulty from the begining....


Sorry to hear that. You may have trouble cooling the diode properly. It requires that the housing on the diode to be kept very cold.

Regards Leif.

General Discussion / Re: need help with power of 2watt M140 Laser
« on: December 08, 2017, 04:34:44 AM »
yes i have a single Lens  and a 3 glass Lense also i tried the lensy of my 2.5 banggood laser .....maybe my laser is to far away i have read  5cm is the best height to mount it ?

Yes, okay with the lens. At some distance, your lens can no longer focus and the dot gets bigger where it hits. However, it is too short distance from the lens to the subject that causes that problems. It will certainly not be a bad idea to experiment with the distance down to the topic to be engraved.

Maybe you have too big or small distance between the lens and the laser diode ??

Regards Leif.

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