Lost first 1/4" of X

[Dan Hintz]

Telling me I have a 24" table is meaningless. They should say it's a 24" table but you can only engrave 22" wide pieces.

But you can cut 24" pieces, so they can still make the claim. I still believe it should be mentioned in the literature, though...

[Robert Walters]

Thanks Steve =)


In case anyone cares...


The left/top edges of the MDF are flush against the machine's rulers.
The artwork is 3" wide, with it's left side at -0.250", basically a bleed.

IMG_20140626_103027 2.jpg


On the ruler...
The dark band between 9 and 11 is the spike the laser gets when it begins to hit a hard limit,
after that there is the tapering off, then the waterfall drop where you see the white area.

IMG_20140626_103016 2.jpg

[Scott Shepherd]

The important question is did the new tube solve your streak issues that you were seeing next to the text?

[Dan Hintz]

On the ruler...
The dark band between 9 and 11 is the spike the laser gets when it begins to hit a hard limit,
after that there is the tapering off, then the waterfall drop where you see the white area.

IMG_20140626_103016 2.jpg

Woh, woh, woh... are you saying that black vertical line at 9.5mm is not in your original image? If so, that is not right, and the tube should not be doing something so drastic.

[Robert Walters]

Woh, woh, woh... are you saying that black vertical line at 9.5mm is not in your original image?

Sorry Dan,

That solid vector line was from a previous test, not an artifact.

The darkish band under it is though. That's the laser "spike" the tech was speaking of.

You can see the effects of the "spike" clearly here between the 4 and 6 marks on the ruler:
http://www.sawmillcreek.org/attachme...4&d=1403423157

[Kev Williams]

I think you may have a controller issue rather than a tube issue... it appears the timing of the decel and the timing of the power reduction is completely messed up. The spike isn't a power spike, it's the result of the machine's speed lowering but the power isn't--until an 1/8" later, then it's okay for about .100", then too much edge power for about .080"...

In short: What I'm seeing is, the power changes are late in relation to the speed changes.

Knowing that an RF tube is capable of firing accurately 3600 times per inch @ over 100" per second, I'm thinking your problem isn't the tube...