Denford Software & Machines

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 Post subject: shadow image
PostPosted: Tue 14 May , 2013 13:08 pm 
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Joined: Tue 20 Jul , 2010 14:43 pm
Posts: 6 Hardware/Software: Veralaser
When rastoring and rastoring a photo im getting a double image only slightley but it makes a poor image ,looks blured.,how can this be inproved? thank you .


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 Post subject: Re: shadow image
PostPosted: Tue 14 May , 2013 14:00 pm 
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Joined: Fri 10 Feb , 2006 12:40 pm
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Location: Sunny Brighouse Hardware/Software: Go to User Control Panel > Profile
Enter as much information about your CNC hardware and software as you can - it makes it easier for everyone to know what you're talking about then.
I'm no expert on Lasers but have you cleaned the mirrors and double checked the height setting is correct ?
viewtopic.php?f=5&t=1322

Remember the laser beam has a focus point where it's at it's smallest and most powerful, then the beam widens which is why you get slightly tapered edges when cutting through a thicker sheet.


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 Post subject: Re: shadow image
PostPosted: Tue 14 May , 2013 14:10 pm 
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Joined: Tue 20 Jul , 2010 14:43 pm
Posts: 6 Hardware/Software: Veralaser
the depth z appears ok ,it when its in rastor the text and image has a off set image to the left.only by 0.19 mm (gessing)


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 Post subject: Re: shadow image
PostPosted: Tue 14 May , 2013 14:13 pm 
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Joined: Mon 13 Feb , 2006 12:35 pm
Posts: 1246
Location: Brighouse, England
Make sure the X axis stepper motor timing belt pulley, is securely fastened to the stepper motor shaft. via the imperial Allen screw on the pulley, if its slack you get backlash which can cause the double image.


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 Post subject: Re: shadow image
PostPosted: Tue 14 May , 2013 14:18 pm 
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Enter as much information about your CNC hardware and software as you can - it makes it easier for everyone to know what you're talking about then.
It could be backlash in one of the axes...is the shadow visible in one axis, ie left/right or up/down ?


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 Post subject: Re: shadow image
PostPosted: Tue 14 May , 2013 14:46 pm 
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Joined: Fri 24 Feb , 2006 17:09 pm
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What is the tuning value set to?

When you raster it fires from both directions so thefore it draws 2 seperate vertical lines. When you adjust the tuning it drops both lines on the same point. The normal value would be between +6 & +8.


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 Post subject: Re: shadow image
PostPosted: Tue 14 May , 2013 14:52 pm 
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wear and debris on the belts can have an effect too.


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 Post subject: Re: shadow image
PostPosted: Fri 31 May , 2013 13:38 pm 
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Joined: Tue 20 Jul , 2010 14:43 pm
Posts: 6 Hardware/Software: Veralaser
Martin wrote:
What is the tuning value set to?

When you raster it fires from both directions so thefore it draws 2 seperate vertical lines. When you adjust the tuning it drops both lines on the same point. The normal value would be between +6 & +8.



yep the value was way too high , +7 did the trick . spot on.
thanks


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