Dutch conversion of the K40

[Tech_Marco]

Imported from the DXF was an outline but I could get the one for engraving from your another file. I could get it in perfect engraving.
You need to limit the speed not over 350mm/s (suggest 300mm/s) for the K40. Or, you're expecting missing steps. The K40 wasn't designed for 400mm/s even some argured that they could. Well, again, it all depends. But no complain if you see missing steps.

I'll post the engrave file after my lunch. I used 350mm/s 2% power (1.5mA)


Marco

[Tech_Marco]

The result seems having trouble for area below the noise and above the mount. It seems that is' caused by the conversion by software. I don't think it's DSP issue.

Marco

[Ruud Hogenberg]

Marco,

Thank you for testing, i am very glad you have the same result.

I couldnt believe this is a result of converting, on my professional machine i do have good result.
So I did a new test.

I did draw the face into lasercad 5.85, dont pay attention how it looks like,
i am not an illustrator.
But the result is the same as with our dxf.
Pls see picture, with this test i do believe its the PWM or sofware.

Will sent the file by mail

Thanks for helping me and the oters.

Ruud

[Tech_Marco]

I talked to the programmer and he said that the problem shouldn't be the DSP but the laer power supply or the laser tube. Since the power supply of your machine and my machine are running the same from a quality manufacturer, I doubt it the PS is the bad guy. In fact, I'm thinking that the laser tube is the bad guy.

FYI, the PWM output from the DSP is constant very stable, I couldn't see any change on the waveform when it ran. But I haven't monitored the waveform while I was engraving that image so I won't make a conclusion yet.

The laser tube that came with K40 is a very low quality tube . Well, I still can't opt out the possibility of DSP issue. Anyway, I'm going to run some test on Monday using a scope to view the output from the card. I'll be monitoring the output waveform while engraving a 'problematic image. If the waveform didn't change at all, then we can climate the possibility of DSP related.

By the way, I hope some one who has a quality system (not K40 because of it's natural issue) with a good quality laser tube, power supply and with the AWC-608 DSP installed can run a test for me.

Here is a a simple test:
Draw a square say 200mm x 200mm with a couple small square or circle hole inside of the square. Then have the DSP configured to 250mm/s with power output 2.5~3% or just barely strong enough to engrave on a piece of paper. Not too dark, not too light but good to see the result. Or, simply download the file I attached here.

Thanks
Marco

[Ruud Hogenberg]

Marco,

Thank you good process to tackle this issue.

Will looking forward to your analysis on Monday.

Regards,
Ruud

[Tech_Marco]

I tested on Monday and the output on the scope was perfect, nothing change on either the frequency or the atitude. Plus, I have the engineer to run a test with their machine and he said that the outlook was great and couldn't duplicate the problem we have. So, the problem is either the laser tube or the power supply. I trend to belive the issue is caused by the low quality laser tube. Unless someone with better tube can do the test for us, it's hard to make a conclusion here.

Marco

[Ruud Hogenberg]

Marco,

Thanks, can you clarify why you had the same result in your previous reply, did you also use a poor quality tube?

Re: Dutch conversion of the K40 | Posted: Thu Feb 23, 2012 11:08 pm


Its absolutely no conversion issue as i have investigated by making a drawing into lasercad itself.

Ruud

[Tech_Marco]

Yes, I have the same machine you have, even older