Youke Ola White Coated Rainbow Plated Tumbler Settings

Community Laser Talk
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1

I am having all kinds of hell trying to figure out the engraving settings for my laser and the tumblers I bought. I either completely overdrive into the coating and cause the rainbow coloring to turn yellowed, or on the flip side not get near enough power to even fully get through the coating. For background

My Machine:
Sculpfun S30 Pro Max 20W with the full XY Extension Kit

Sculpfun RA 4-in-1 Rotary in Chuck mode

The Tumblers

I have tried the following:

1. 2500 mm/min, 60% power, .075 LPI (seemed to easily get through the coating, but the                        underside almost seemed to noticeably become yellowed, no matter the color of the                         underneath rainbow layer)
  1. 3200 mm/min 45% power, .1 lpi (mostly got through the coating, but again seemed to turn it semi-yellowed)
  2. 3500 mm/min 35% power, .12 lpi first pass, 4000 mm/min, 15% power polishing pass (did not even get through the coating, and required hard scrubbing with a magic eraser to try and remove the leftover coating)

I have tried toggling the air assist off and on for different attempts at this with the above settings all to no avail. Can anyone offer suggestions, tips, settings or whatever to help me get this figured out and not completely waste all of the tumblers I have just trying to dial it in? Am I missing something obvious here? Thank you in advance.

2

Forgot to add, I am focused direct on the tumbler using the Sculpfun provided focusing spacer block.

3

The only obvious thing is you are changing too many things at once. How are you going to know which setting changed is the right one?

With this one, you are low on the power. I would start here, reduce the LPI to 0.1 and keep the power the same. To increase the power at a spot, lower the speed. Try lowering in 200mm/m increments until you get the “yellow” you mentioned. Then pick a speed in the middle of the 3500 and the yellow range.

To keep from blasting thru tumblers, pick one and just engrave small areas, like maybe 1/2”. Turn off the rotary and move the tumbler my hand for now.

4

Do you know where this rainbow coloring exists?

The mug vendor in your link advises it’s a plating, then refers to it as a powder coat.

Do you know what you have to remove to keep the rainbow colors?…

:grinning_cat:

6

I had ruined a cup or two before just puttering around. trying to get a close enough setting. I will try that small graduation rate on this that you suggest and see if I can make headway.

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7

I think I have a pretty good handle on the settings now. It is a marked difference from what I had above. The reason I say this is that I managed to find someone else that gave me a good basic starting block, and I modified it from there. The final settings I settled on are:

6000 mm/min (they had a 10w diode and had it as a 2000-3000 mm/min range, so I doubled their speed and kept the same power lvl)

65% power (they had 50% and I didn’t want to have to use a slower speed and cut the power in half based on a 2 pass for their 10W)

.07 LPI (my own choice for a one pass with minimal scrubbing with 91% alcohol and Magic Eraser)

I also defocused up appx 8-9mm just to keep from blanching the color underneath yellow like I had mentioned. I think this is the complete set of numbers I ended up with, but if I forgot anything lemme know.

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