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This is embarrassing, I promised follow up and I totally forgot about it.
No, saving in another AI format did not help. So I tried the other suggestion, Lightburn. Despite it still being beta, it...

Hi John,

I always save as Illustrator 8. I'll try 3 tomorrow (4 is no longer an option in my version).
And I'll have a look at Lightburn. Any alternative to RDWorks is worth investigating ;-).
...

Somewhere in the past year I upgraded my Laserworks software from V5 to V8. Since I do mainly cutting with maybe one part engraving this problem never came up before today.
I tried to import an...

Checked the wires, no problems there. To rule everything out I took the whole machine apart (except for the XY stage itself). That was the only way to reach the gears on the Y-axis. The gears turned...

My machine is not that big (50x30 cm work area) so I don't expect spliced cables. But of course it cannot hurt to check. Your symptoms are different though. In my case the fault happens all over the...

And the problem is back...
It seemed to be gone after my software downgrade, but today I notice a difference between two items that should be identical. So I did the test again running the file from...

If only my controller had an ethernet connection. But I have to make do with USB...

Cleared the memory, does not seem to make any difference. I'm now back to RD-Works V7. This seems to make the cleanest cuts. But I will probably be reminded soon why I switched to V8. Cross that...

Will try that tomorrow, but I had a look at my 'saved files' this morning and there were only 12 files, all very simple tests from when I just got the machine in 2013. But I might as wel throw them...

Plywood settings mean that I did not adjust anything in speed and power. I did not want to change too many parameters, only to find out the machine works well at 25 mm/s and gives me trouble at 6...

All screws appear to be tight. So I ran the test John proposed. Ran a complicated file from the computer, none of the larger shapes closed, smaller shapes don't appear to be affected. Also it seems...

Hi John,

Good thinking. I'll try that too (after I checked each and every screw...).

Ah OK, I'll check that as soon as I'm back at the shop. I did check the belt-tension screws, but not the ones that hold the pulleys to the motor shafts. First thing tomorrow morning (it's 7 PM here...

Hi Doug,

If you mean the two screws you use to set the belt tension (English is not my native language, so I have to double check if I understand you), then yes. I checked the belt tension and in...

I have a Shenhui 350 Laser. I use it mostly as a hobby machine, so even though it's three years old it has not got that many hours on it.
Today I cut some 3mm (1/8inch) birch plywood but that did...

True, any pointers?

BTW, I saw the post about the house you're working on. Wow!

Yes, I'm afraid it is the tube. But finding a replacement is no easy task. Shenhui wants to sell me a new tube only if I take the full risk of breakage during transport. So that's not an option. ...

So many good things to learn on the www. This certainly is one of the best recently!
Thanks a lot for this link.

The meter. I'm not decided about a tube yet...

Looks good pity it's not available in Amozon Europe. Sending to the Netherlands often costs alnost as much as the device itself...

Funny thing is I asked Shenhui more than once what the power of the tube is but never got further than 40/45. My tube is also about 850 mm long, but 50 mm diameter. So it's most likely a 40 watt....

I just put my meter in the return line from the laser tube. At full power cutting it reads 17.2 mA. That seems to be a bit low. But of course the question remains, is it the tube or maybe the power...

Thanks for your replies.
Mirror alignment is OK. Checked all four corners of the bed, less than 0.5mm. difference from the center on the final mirror, so no problem there. I've got two lenses, both...

Hi, Last year I bought a Shenhui 350 (50W). I use it mainly for hobby purposes, so it has not been running more than a couple of hours in a row. In fact, after about a year it has 97 laser-hours on...

So you don't agree with Matthew's comment that 10 Watts should be enough? I suppose (newbie) that lower Wattage can be compensated by lower speed, but only to a certain point where the energy from...