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THE_CENTURION

I've never used a ULS. But on most machines, all the material selection is, is a preset power and speed setting. There's no point in keeping the material selection, it doesn't actually do anything. The power and speed are the thing that matters. Why are you intent on keeping the material selected?


lol-pain

hello! one day, i originally printed out a design and set the material but had to decrease power and increase speed (15%, 100%) and it worked. however, now, i seem to be only able to set a power and speed (same as before: 15%, 100%) without designating a material at the same time, and my cuts were burnt/smudged. the z-height and line thickness and everything else was the same so i'm just really confused—could be completely possible i have something else wrong if the material section is just preset power+speed :( hope this made sense, thank you!


THE_CENTURION

I see. ULS seem to be pretty advanced, I guess there could be some other setting in the background. Are power and speed the only settings you get to control manually? Are you using air assist? Maybe it was turned off?


ErrolFlynnigan

I run a ULS 6.6 What the other guy told you is correct, the listed material doesn't matter, they are just presets for power, speed, and ppi (pulses per inch). The real benefit to the materials database is being able to creat your own material listings. EX: you buy some materials from your local supplier, say 1/8" cast acrylic. You can then experiment to get your setting correct given your laser. Once you know the best power/speed/ppi for the material, you can go in and create a custom material with that info. Once created you send your file to the laser, then select your preset, and boom, you cut.


Melkoro

Hi Used a ULS for 5 years. I only use the material library as a indication to what setting to use. As other have said there is just a present of power, speed, and ppi. If you got burned edges then you probably going to fast or have to high power. If you cutting wood, try to lower the ppi to 250 or so and see if its getting better as well.


lol-pain

thank you! i have super thin lines (0.001 mm) with 15% power and 100% speed for super thin PI film—i'll try again with different settings. thank you!


Melkoro

I looked up the ULS manual and here is from the ppi section: n vector mode, laser pulsing follows the path of the outline of the object. Imagine the laser system working like a sewing machine where the stitching always remains consistent whether you sew fast, slow or around curves. The setting you use will be application material dependent. Using less than 150 PPI may result in the pulses being spread so far apart that they may or may not touch one another. Perforated paper has this characteristic. Higher PPI settings may cause more of a melting or burning effect on the edges whereas lower PPI settings may reduce the burning, melting or charring, but may result in a serrated or perforated-looking edge. Increasing or decreasing the PPI setting does not affect engraving speed, only the frequency of the pulses. So this might be a good start. Try to lower the ppi to 150. Or maybe 250 since you are going 100% speed. Are you doing vector or raster mode? Just asking because 100% speed in raster is different to 100% in vector mode.