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Here is correct belt.

MXL Zahnriemen (Meterware) Riemen - MXL open belt - CNC / RepRap / 3D Drucker | eBay

Its 2.03 mm *****. Problem its is 6mm so you need to cut with sharp knive. Easy to do....

I broke my x-belt and need new one asap.I live in Europe / Finland.Anybody know what is correct pitch. Lightobject says is 2.3 (not any standard) and somebody says its 2.03.Any Link to order or...

No there two diffrent k40 on the markets. Older on with Moshi controller and new one lihyu studio labs card. There is also few diffrent lihyu studio boards but they are allmost same. I use corel with...

Sorry. I dont use moshi. Never used. But i have seen video on youtube how you can do it

Yes i have normal K40 machine.
Modified little bit.

And if you like engrave you dot is smaller so you can make high quality engraves. With 38.1 lens power is allmost double, dot is smaller and you can cut max 6-7mm. I cut 4 mm birch plywood 20% and...

Loose your belts and just put it right, this is very common problem.

Okei if you have scandinavian Birch plywood that means you vant cut it . Why? Because of they use new kind of glue. With that glue its almost water resist.
Old glue was urea glue and that you can...

Is there any sticker or product code or something if you check tour power supply. 220v powersupply with 110v give something out but laser not firing...

Okei! But are you sure yout power supply is 110v? There is same machine with 220v and sometimes they put wrong stickers.....

There is 220volt and 110 volt laser on the market.... Are you sure you have right one?

i have these !

CO2 10600nm Laser Eyes Protection Glasses/Goggle. CE certified

Alot of work :-)

Its normal issue. Just turn it right. Loose your belt and fix it. Turn it right, you can hear when belt jump over.

Check your X axis. It must 90 degrees angle. Some machines its wrong.

Please let me know your speed settings.
Maybe you try to drive this machine too fast.
Also turn power of and move your X And Y axis. Both must move easily with finger and without sticking or...

You are right but these people use 50w china laser. Its little bit different machine. There is also different plywoods. It debends what glue they use. I have different birch plywoods in stock....

Yes i cut usually max 6mm plywod and max 5mm acryl.

I have also good exhaust system.

https://docs.google.com/file/d/0ByJiMgZoeaEVT211bmFkMlpoVkU/edit?usp=docslist_api
...

Some laserhead video sample.
Laser cut sample: https://youtu.be/qNkWxViw0ig

I have usb camera. Never cleaned. Never problem. I cut only plywood or acryl.

https://docs.google.com/file/d/0ByJiMgZoeaEVOWFrOXpiUjZBdFE/edit?usp=docslist_api

Change your motherboard( mainboard) from settings. Try B1 or M2.

MRMaxP. Loose your belts and just put it straight like 90 degrees angle. Its very popular problem in china machines. You can hear small noise when belt is jumping when you turn it right.

This is good place. They have birch and poplar plywoods.

https://www.kitronik.co.uk/3201-3mm-laser-plywood-600mm-x-400mm-sheet.html

Another places.

It depends what glue they use. "wrong"...

No problem :-)

If you have wrong motherboard select from settings everything is slow. Righ one i usually B1 or M2

So if you have sample file . Maybe me and somebody else can check and test it.

There is few good test check test your hardware quality.

Make big circle like 150mm x 100 mm and "cut" it small...

You can also make square round to your work and uncheck outbound line. It focusing your engraving and cut works and not cut or engrave that square.

Its important to know your focal lenght. What is the distance from lens to your material about. I think its more than 2" with stock lens. I,m just thinking is there same machine with different focal...

Ok. I have different machine but focal lenght and dot size and dof you can calculate them. I cut max 6 mm material. Quality is important to me. I need small dot and good engraving quality. Also its...

Bratan. Are you aure your focal lenght is correct?