Monthly Archives: February 2021

Ortur Motherboard Issues – Or Lack Thereof

I have an Ortur Laser Master 2.

I have determined that it is now an essential piece of equipment that must have minimum downtime.

That lead me to purchase a new Laser module and a new Motherboard.  These two items and associated parts are the lions share of the machine.

Ortur seems to be really trying to be open about issues and also seems to have pretty great customer service.  And they’ve done something that I think is remarkable.  They have created a Product Advisories web page.

One of these advisories is about a batch of defective motherboards.  My Ortur Laser Master 2 is working perfectly but I was concerned about my spare board that I just received.  They specifically said if your board failed some previous tests to look for the markings OLM-MAX-V10

Ortur Product Advisory

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Fixing Your Own Stuff – Washing Machine

Samsung washer playing dead

Hear a noise from your washing machine?  Call a repairman and you’ll pay them $100 just to ring your doorbell.  They’ll charge you double for parts and charge you labor as well.

A lot of new washers (or dryers) cost in the $400 and up range so you’ve hit the price point where you just are prepared to buy another one.  Ever wonder why Appliance guys are happy to haul your old stuff away for free?  They know there really isn’t much wrong with it.  They can fix it and resell it, probably to someone looking for a new washer because theirs is broke.

I am NOT knocking appliance repair people.  That’s just how it is.  That has been the system for years.   But the new system is FIX IT YOURSELF.  Everything that has ever broken has a YouTube video attached to it.

But now a lot of manufacturers are responding to that by not selling spare parts and not publishing manuals.  That’s wrong, and many states are enacting legislation to stop them from doing such things.  The premise is, that once I buy it, it is mine and I can fix it, destroy it, paint pink unicorns on it…….IF I WANT TO.  And they can’t, or rather shouldn’t be able to stop that.

So my girlfriend has a Samsung washing machine and it started sounding like a tire mechanic was laying down on an impact wrench when the spin cycle started.  A real ratcheting sound.

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K40 Upgrades

OMTech K40 Laser

The Chinese laser often referred to as the K40 (40 watt) is an entry level CO2 laser at a magnificent price point.  They can be had for around $350 to $450 dollars depending on where you get them and how you get them configured.

I got mine from a place called OMTech for about $420.  It is also were well configured and has many upgrades already included.

Right out of the chute these things engrave and cut well although the 40 in K40 seems to be a bit of a gimmick.  A lot of the included laser tubes are actually 30 to 35 watts.  It’s really not enough to kick a fuss up over.   It’s just the way it is.  So that kicks off the upgrade discussion.  You can buy larger and more powerful laser tubes.

Once you use one of these things a bit and learn your way around one you’re going to want to upgrade some things.  While they do indeed come at a magnificent price point the old adage applies.  You get what you pay for.

Let’s go over a quick list of things you are going to want to upgrade.

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Supporting your Ortur Laser Master 2 – Or How To Stay Running

I have an Ortur Laser Master 2.  Very, very nice low powered diode laser rig capable of making some great craft items.  I also have a larger K40 Laser however sometimes it is like trying to use a sledgehammer to drive a nail.   The Ortur has great flexibility because of how open it is and the fact it can be set on any surface or pass materials through it or raise it way up high.

Make no mistake though, the Ortur Laser Master 2 is NOT a production machine.  It was not meant to be run full power, all day, every day.  It is a hobby device for hobbyists.  If you push it beyond that…….well…….good on ya.

There do seem to be some issues with the laser though.  Some users report 100% laser power 100% of the time and frequent disconnects, not to mention the fact they can’t connect at all to the computer.  So there are issues going in……………

It CAN be a production device though with some pre-planning and regular maintenance.

Let me tell a somewhat unrelated story.  I like solar power and solar powered generators such as the company Jackery makes.  Every time they release a new one about 50 clowns on the internet say “This is bullshit. This will only run a refrigerator for 14 hours and my heart transplant kit needs to run for 15 hours.”

My response to that is always this:  “So buy two of them!”

Do you see where I am going with this?

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Adding a MilliAmp Meter to K40

A K40 with a digital control doesn’t actually indicate actual laser power.  The only way to reliably measure the current from a laser tube is to add a milliamp (mA) meter to your K40.  While there are a lot of differing opinions on max power draw most agree it is somewhere between 18 and 20 mA’s.  Some people even pull short at 15mA to improve tube longevity.

Adding a meter is SIMPLE.  Locate the Black wire on the EXIT end of the laser tube.  That is the end closest to the mirror.  That black wire will be spliced to another wire that runs all the way to the L connection on the Power Supply.


K 40 Laser Tube (L) wire

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Mini-Gerbil Control Card Installation In K40 Laser

I recently bought a K40 Laser from OMTech. Most people use a free software mix for the K40 utilizing Inkscape and K40 Whisperer but there is a far better software solution (not free) called Lightburn.

I liked K40 Whisperer and was getting the hang of it.  It’s actually pretty powerful and it really is a good hunk of software but it just isn’t Lightburn.  No knock at all on K40 Whisperer intended.

Most K40 lasers come with a control card called an M2Nano which is not compatible with Lightburn.  The only way to run Lightburn on a K40 is to purchase a new controller card.  There are several options out there but I went with the Mini-Gerbil from AwesomeTech.  I just got the card and installed it and as always took notes while doing the installation and ran into a couple of noteworthy things that I thought was worthy of a blog.

There are SO MANY K40 variants that it is hard to say that anything I took note of is a problem.

“Let me just throw this out there…….If you bought a K40 laser and realize you need a new control card and aren’t scared in the least to change it then nothing I note here is above your skill level.  I don’t view anything as a mistake or documentation error.  There are simply SO MANY K40 variants out there it is tough to cover them all.”

Let’s roll.

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K40 Laser – First 48 Hours

I recently bought an Ortur Laser Master 2 which is marketed as a 20 watt laser but it is truly about a 5 or 5.5 watt output power diode laser.  It’s an amazing device for engraving wood and cutting thin materials.  In other words it has some limitations.  I’m having so much fun with it but the forums are full of stories of parts failures.   If you have a hobby device and it fails it’s not the end of the world, however if you are making money with the device you probably should have a 2nd one at the ready, or at least buy spares, such as another controller board and laser module.

So that’s where I’m at.  I made my first couple of sales and I realized that if I can make a buck or two I’ll lose credibility real fast if my machine goes down and I can’t deliver.  So I decided to pick up another machine.  After all they are cheap.  Around $300 or so.

K40 Mini Laser

Then I (re)discovered the K40 Laser.  K40 isn’t a name brand but rather a gigantic swoosh covering a range of inexpensive cloned Chinese 40 watt CO2 lasers.  K40’s are made by several manufacturers and sold by untold number of secondary retailers especially on the Chinese electronics websites (Aliexpress, Banggood, etc.) and eBay.  The quality range varies from great to absolutely horrific.  You need to carefully source your supplier and do lots of research before buying one of these things.

That being said, these machines are a platform for upgrades and lots of the people who buy them don’t much care if they work or not.  They will make them work and improve and upgrade them in the process.   In fact I’d love to find one broken that someone was selling for a song.  After 48  hours with this thing  I’m pretty confident I could rebuild one and repair parts can be sourced cheaply.

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