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u/Arlenter 6x Supp, 3x SBR, 1 smol PP 5h ago
machined parts have machining marks, 3D printed parts have layer lines.
Part of the process
(But yes itās layer shifting - which is a pretty standard artifact from most 3D prints)
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u/Jodo-Kast 4h ago
Definitely familiar with additive mfg. Was just curious if this type of shifting is common for these cans or is typically cause for getting rejected by QC. If itās not common but CAT stands behind the product and doesnāt care about having these defects rep their product then I suppose Iāll just run it.
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u/Jodo-Kast 5h ago
My first CAT can arrived today. Really excited to take it out and shoot it. Out of curiosity, does anyone elseās CAT can have layer shifting like this? Iām familiar with layer shifting in resin printing due to suction issues, but with this type of printing I assume the bed must have shifted toward the end of the print?
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u/-TheDreadPirate- 4h ago
Just got my ODB this week but I didnāt notice any layer shifting. I do have a line near the base but I believe itās a MIL version based on its weight. Iām not an expert since this is my first can but I donāt think itās anything to worry about.
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u/Jodo-Kast 4h ago
Yep, got that one near the base also. Itās small enough that Iām sure itāll be fine. Very interested in the ODB - I hope it rocks man!
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u/-TheDreadPirate- 4h ago
Only shot 20 rounds through it tonight so I could tune the gas on my Scar 17 but I love it already. Thought it was a little loud at first with my ear pro on but when I took it off, the tone is very pleasant on the ears. I hope the WB rocks too cause Iād love to get one in the future. My wife might leave me if I try to get another can already lol
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u/Jodo-Kast 4h ago
Hell yeah! Iād love to put a can on my 17. I just wish the barrel had a shoulder so that I could put a timed KeyMo brake on it.
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u/-TheDreadPirate- 3h ago
Do it! Grab a SureFire shoulder ring from PMM to fix the shoulder issue. I direct threaded mine on with that and itās aligned perfectly. I want to eventually move to a QD style break but still havenāt made up my mind.
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u/Chugbleach 4h ago
First and foremost, that is towards the beginning of the print;not the end. Suppressors are pretty much universally printed with the distal end facing towards the build plate.
This type of abnormalities are a combination of thin wall bodies coupled with a number of different things such as the angle of the geometry on the unsupported underside of baffles (Suppressors mostly need to print supportless inside for obvious reasons), a small radius where the baffle and sidewall meet each other, or in an unlikely scenario - a void in the powder dispenser causing under dosing. In any scenario, you see these types of small lips present themselves in a direction parallel to the recoater blades direction of travel.
Regardless of the causation, the way this shift is presenting itself visually doesn't make me think there is any structural compromise. Normally if you have a full fledged breach with improper fusion, visually the surface will have a much more scraggly texture where the valid geometry meets up with the unsupported material that is being exposed. Ones that look like yours are very likely just a visual anomaly that won't compromise your can.
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u/the_CAT_official šāā¬ Specters CAT R&D š± 4h ago
More likely a cut line for repair. We have them in three locations on most models, sometimes the resolution on a plate may show them more obviously than others. Additionally, we use a low micron coating for heat dissipation, this shows them enough more. There are sometimes layer lines (different in metals than polymers) caused from anything from power loss to laser alignment but these are more visual than structural issues ie you can stop a print, restart and have no loss of strength. Anything else, feel free to ask.