@jooshs:
The copper is 0.0014" (1oz) based on the package. I printed at 100 for the first layer and 90 for all others.
Since this was my first print, I don't know if it had any effect. However, I will say that it took a seemingly long time to get to 100. Overall, I would estimate 1 degree of heat increase about every 10 seconds. Sometimes it seemed to do about 0.01 / second and then sometimes it would jump by 0.4 or 0.6. Could also be just the way the temperature sensor was reading out.
The plate got hot to the touch (as you can imagine) so I let it cool down a bit before I pulled it out. Never switched plates, I need to find a good way to clip and unclip the print surface. The ones I have on there are sticking up more than I like and are a bit inconvenient to put on and take off when I have a cover on the printer.
@cmetzel:
Ahh, you are the one who made that. The copper boards are 0.0058" thick on all sides. My calipers cant reach the center, but since I printed on the center, it seems that everything was fairly consistent. Took me the most time to level the bed (wasn't level when I got it), adjusting for the height of the additional copper board was nothing.
The print stuck fast to the board too. Even when cold, I had a bit of a hard time getting it off. I might have my hight a little too low. Based on the dimensions you provided with the stl, I am off by a little in every direction. And, not consistently. For instance, the width is 1.778" where you state it should be 1.700". My depth is 1.793" rather than 1.700". The height is 0.147" rather than 0.125".
So, now I just need to adjust my flow rates and switch to an older version of slic3r to get rid of that stippling on the surface.
Just so you know, that stl has some holes in the surface. I had it repaired, but it wouldn't print without doing so.
Seems to be pretty useful as a calibration piece. I printed at 0.25mm layer height and it took something like 15 minutes to print or something (not counting heat up time).
--Tim