How to add ammeter to 50W Chinese laser cutter from eBay

Ammeter add-on was on my to do list for a long time. It’s important to know what current is flowing thru your CO2 tube so you don’t shorten it’s life. Ammeter measures current and in case of this SH-G350 machine you’ll want ammeter rated in the 0-30 or 0-50mA range because most CO2 laser tubes run under currents under 25mA.

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November 20th, 2015|diy, How To, Laser machine|12 Comments

60W laser upgrade

It’s no secret that my SH-G350 laser machine, a.k.a. 50W eBay laser cutter, is not really a 50W.

Yup, it’s one of the biggest scam on the eBay.  What you get is actually a machine with 35-40W watt 800mm long CO2 tube, that’s being overridden with higher current to work like 50W.

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November 13th, 2015|Laser machine|6 Comments

Cu laser mirror

Back in February I wrote a post about mirrors used in CO2 laser machines.  Here’s a little update.

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November 13th, 2015|Laser machine|0 Comments

DIY Lighted Marquee Sign for Halloween

For this year I decided to do a Circus themed Halloween party.  One of the major props for the part was supposed to be a large lighted “Circus” marquee sign (also called dimensional lettering).

There are more than few tutorials on how to make such sign, most of them involve using some kind of thin sheet […]

November 5th, 2015|diy, How To, Laser machine|Comments Off on DIY Lighted Marquee Sign for Halloween