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Hi Michael!
When you find out, please let me know if tickle adjustment is indeed possible on the on the Legend EX.
Chris.

If there are grub-screws on any Y-axis drive pulleys make sure they are all tight.

Try the "burnination" test for PVC content.
http://vimeo.com/1615418?pg=embed&sec=1615418

If your tube has a "cold-start" issue, try adjusting Laser Tickle mode/intensity.

Would rastering through a low/medium-tack film mask, spraying the fill & then peeling off the mask add too much time to this?

I really don't understand why anyone would do anything other than this.
Why overcomplicate the issue & create extra work for yourself?

Maybe back up your settings folder onto a USB stick every...

pro: Lower frequency means less heat buildup in the cut, so less charring.
con: Vertical lines on the cut edge may become more pronounced.

With plywood it's often the adhesive between the ply...

Hey Martin, try dropping the frequency way down, PETG cuts much cleaner, you'd be surprised just how low you can go & still get your cut.
Lower frequency/ppi means less heat buildup.

Good point.
Also, if you're engraving on objects that would foul the focusplunger & air-assist-pipe, like a bowl with a tall rim, the 4" lens gives you that clearance.

The 4" lens to fit the...

Yeah, you can get a 4" lens for a Mini/Helix... looks the same but has a long focus tool.
The 1.5" lens fits via a 1/2" step-down block & so uses a regular focus tool or autofocus.

Onur, perhaps this subject belongs in a thread of it's own...
It's not quite as straightforward as "-1.5" cuts better and 4.0" engraves faster-"

1.5" lens gives a smaller spot-size , so will cut...

Just set the piece size in the Epilog driver so it matches the page size you're using.
Many users will set up a default page size ( in Corel or whatever ) that matches the laser table size, set the...

The Stucki dithering in the Epilog driver is pretty good...
But converting to 1-Bit Black & White with Stucki dithering in CorelDraw ( after resizing ) gives you more control (with the slider) and a...

Tiling graphics tutorial:
http://www.epiloglaser.com/tiling_graphics.htm
( Tutorial is for Corel12, but should suffice )
Or this:...

Or you could try the "burnination" test...
http://www.vimeo.com/1615418

I've never seen "double-dithering"...
In my experience the Epilog driver only applies the dithering when it sees levels of greyscale.
If you've already converted to 1-bit black&white in PS or CDR...

Isn't this a bit like driving your car with your gas pedal all the way to the floor & then complaining that you keep running off the road?

I can drive the gutless diesel minivan like that, but if...

I saw the footage of this kid doing it, magnets to defeat the interlocks is a no-brainer...
I'd think that with repeat treatments this may be a method of removing tattoos rather than permanently...

I understand that PPi supposed to be a constant along the length of the cut , & frequency is linked to time.
Like the above posters, I' curious if this mean that a machine with PPi control maintains...

I don't know about Photograv but if you're not using that then you definately don't want to convert to greyscale.
Convert photos to 1-bit black&white using the Stucki dithering within Corel Draw....

I'm not familiar with machines which lack frequency control for vectoring, and have not used lasers with a PPI setting, but I'd guess they do a similar thing.

I think it may go like this: ( my...

500 is Epilog's suggestion - but all the values on their settings page should be viewed as a starting-point for your experimentation.
For example their suggestion for anodised ali can be way off...

For a less charred vector cut when you're lasering wood, just drop the frequency right down.
Frequency for the vector is independant of dpi... lowering it will mean less heat build-up in the cut &...

On Epilog machines this the "Laser Match" adjustment, made from the machine keypad.
Best job for this adjustment is a low dpi rastered box on anodised ali or acrylic & examine the left & right side...

Shane,
is that "halo" just on the vertical edges of the text, or all the way round?
( It's not clear in the picture )

For the purposes of investigating your fault, try rastering a small pure...