Yet another cast aluminum plate topic...
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@percar Wow! a full mm is pretty large, what type of plate did you use?
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I recommend: https://www.mcmaster.com/7602a53
It's a mother to get off though.. plan on breaking the mirror unless you're really patient. It's heat resistant, and solvent resistant, so it works famously. It's super expensive for a roll though. If you're in the states, I'd be happy to send you a couple feet. My suggestion however would be to get a magnetic sheet and go with a flexible PEI powder coated sheet from TheKKIINNGG on ebay. This dude's plates are AMAZING! I have them on all of my machines. In addition to better adhesion than the mirror (whether using glue stick, "Magic Juice" or Hair Spray) removing prints is a breeze. I'm happy to share any info you may want to know. It was the single best mod to my large format printer yet.
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@wyvern The type or brand of aluminum doesn't matter. The thermal expansion coefficient of aluminum is about 24 um/m-K. Apply an 80C (=80K) temperature rise and it expands: 0.6 m x 80K x 24 um= 1152 um = 1.152 mm
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@percar did you check flatness after that massive plate had time to stabilize at the set temperature, maybe 10-15 minutes or so after the heater was turned on? What was the power rating of the heater?
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@mrehorstdmd
I only asked because the CTE varies slightly depending on the alloy, that said, it doesn't vary enough to make a huge difference.The granite plate plate solution is interesting, but how did you get around it's poor conductivity?
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Have you some place in France for mic6 plate ?
I don't find yet.Thx
