Lightobject.com Support Forum

Hello folks,

I am very new here, and this is actually my first post.

I have started to build my 2.X laser cutter from Bart Dring at buildlog.net.

This machine is aimed for a 40W laser tube, but I have seen on LO pages there is also a 45W tube which is longer (850 Vs 1000 mm)

I know I can have the 45 tube, but will have to extend or make an addition to the frame to compensate the extra length.


My question is: Is it worth the trouble at all ? Does the difference in performance between these two tubes justify the hassle ?


And another one: I have read somewhere that 40W tube will not require a cooling system - Is this true with the LO 40W tube?

If not - Will a 45W tube requir cooling ?

Many thanks

Isaac

Hello Issac:

The max 1M laser tube output can reach 50W but a 850mm tube can output 42W at max. 8W seems not much by the number but, once it is focus by the lens, the heat it generate can't be neglected. If you do a lot of cutting, then I suggest you go for the 1M if you can do modification. It is hard for me to say "Yes" or "No" depends on the difficulty. If you do more engraving instead, then may be you should stick the default design because 40W vs 50W make not much difference on engraving.

Both 40W and 45W tube need water cooling. Only RF laser tube does not need water cooled but by air-cooled.


Marco

Thanks fot the info Marco,

I will think about all the pro's and con's - now that I know there is some benefit in it.

Best

Isaac

Great!

Sorry for the inconvenience. You should have to wait at all if the first one was good.
I'm going to drop this supplier "SP" and may considered to use another supplier "JW" who used to make small tube for us.

However, the price of JW is the highest among all but the tube quality is no doubt but the best. JW is very good making small laser tube with stable output and it last longer than other. It is $30 more though. I'm just curious if you folks are willing to pay the extra to get better tube, or the lowest price the best?

Nowadays, there are so many ebayer selling laser tubes on eBay. Some may be good but some are terrible. Usually they're over rated the power like 850mm, they will consider it as 45W while a 1M long will be rated as 50W. Their price is the lowest and I can't beat it because of no guarantee or no services and ship from China. If I carry the JW tube, then people may ask me why do I charge so much for the 'same' tube. Of course you know it is not the same but people don't know the difference. They only look at the power vs. price. That is sad, isn't it


Marco

Hi again Marco,

Although I am new here - I have heard lots of good things about you and your support, so I guess I am going to trust your judgment on this.

I will gladly pay the difference, since I believe the cost of modifying the frame will be the same or or more. If you say the 850 mm tube you can get is good and reliable - I will go for it.

I am sure other guys will also go this way if they can get a 50W tube inside the default frame.

Many thanks

Isaac

Hello Isaac:

I still have a few SP 850mm 40W laser tube. I have to sell it all before getting another brand. I was told that this SP 850mm wasn't manufactured by the SP but being contracted out to another small tube manufacturer. SP only make good tube on 60W or 80W. Well, even though the quality of this batch is not as good as JW. But the price is lower and we have to test it before let it go. It is just a matter that we found out more defective tube than usual.

I learned a new lesson from the hard way. Next time, I have to be very careful when dealing with those company in China. I won't say product made in China is bad because iPhone, Samsung phone, Dell computer, and a lot good brand products are made in China. All I have to say is: "You got what you paid for".

I will import better small tube on next shipment. Possible on Nov.


Marco

Hi Marco,


Thanks for the info.


I am in my first stages with my Laser cutter - so next shipment will do fine with me. I recon it will be early next year, since I think the tube will be the last part to buy.

I will need from you the electronics and laser stuff before that, but you definitely can put me in for a 850mm one, be it 45 or 50W.

Many thanks

Isaac

Isaac:

I forgot to mention that we have another 850mm laser tube available.
http://www.lightobject.com/SPT-850mm-CO ... -P977.aspx

It is under an OEM for SPT. The quality should be good and the output is very stable. It may not be as good as the JW but I think it is better than other 850mm laser tube. You may want to give it a try.

If you want to, I can shoot a video and posted on YouTube


Marco

Hi Marco,

Thank yo for your kind offer.

I think it is best to wait until I am ready to put the tube in. There is no logic to invest now in something I will use who knows when, while I need the money to get the parts for these stages.

When time comes - I will be in touch. Once I will finish the framework - I will be in touch for the electronics first.

All the best

Isaac