Wavy Scans

[GoBeavs]

Has anyone had experienced wavy scans like this:


When I turn the frequency setting up on my laser to it's full 60Hz I get these wavy scans as illustrated below.  The stardard dev. of them are also about .020", and I get about .0015" standard dev. when I use a lower frequency setting.  I have found that I get best results using 50% and 40Hz. I was scanning a tooling block in this example, so it should be easy scan.  While it works well with the lower settings, I would like to be able to use the full capability of my laser. Any ideas will help... thanks.

[prehistory]

I've seen waves like that from scanning at an awkward angle.  If you are really straining to scan an area, your arm will begin to shake a little, causing the "tremor" in the scan pass.  There is also no need to set your scan density any higher than 100%.  The "Full" setting simply interpolates, as I understand it.  If your arm isn't shaking, maybe double-check your scanner calibration?

[PW User]

It may also be a calibration issue. Alhtough I am not an expert on the hardware side, I've had this problem with a poorly calibrated device. I also saw it with a faulty hardware device that read the scanner's position in space erratically.

What are the value of Max edge length and interpolation step in your scanner plugin?

[spike3d]

Can you post a screen shot of what it looks like at the lower frequency and %?

If all you changing is those 2 parameters then I would suspect that the scanning hardware and software combination is unable to process the higher scan rate data while still getting regular arm position updates.

It might also be interesting to see what the processor(s) usage is like at the two different scan settings by watching it in the Task Manager

[Admin]

Anything new with this GoBeavs?

[GoBeavs]

Can you post a screen shot of what it looks like at the lower frequency and %?

If all you changing is those 2 parameters then I would suspect that the scanning hardware and software combination is unable to process the higher scan rate data while still getting regular arm position updates.

It might also be interesting to see what the processor(s) usage is like at the two different scan settings by watching it in the Task Manager

With a lower frequency the entire scan looks like the front (yellow) that is nice and flat.

I have not run into this since, so I have not needed to play around with it.  I'll let you know if it comes up again.  Thanks for everyone's help.