accuracy aka resolution?

[Slatye]

I don't think i understand

From an engineering point of view:

Resolution - is pretty much how small the smallest feature can be. 0.1mm is pretty normal for FDM printers like the Makerbot, since nozzles to print smaller parts tend to be expensive, fragile, and very slow. Resolution for each axis may be different; often Z resolution can be easily adjusted.

Precision - is how reliably the printer can do the same thing that it did before. If you print a 10x10x10mm cube and then another 10x10x10mm cube, are they both the same size? Note that precision is not concerned with how close the printer comes to what you wanted. If the first cube was 12.000002x15.000001x5.999999mm and the second cube was 12.000000x14.999998x6.000001mm then the precision of the printer is very high - even though neither is anywhere near to the 10x10x10mm cube that you wanted.

Accuracy - is how close the printer comes to what you wanted, on average over multiple jobs. The example above is a printer that is very precise but not very accurate. On the other hand, you might have a printer where the first cube is 12x9x12mm and the second is 8x11x8mm. This printer has very high accuracy (if you average the two cubes, you get 10x10x10mm) but very poor precision.


Now, with the Peachy:
- Resolution when close to the job is excellent. Resolution when further away will be worse, as a small movement of the mirrors translates into a larger movement of the beam on the resin. On the other hand, when it's very close to the job then focus changes at different points could cause problems. Realistically, it looks like the Peachy's resolution will be more than good enough for very nice-looking parts the size of phone cases.

- Precision is good in the most recent prototypes. They had issues in early prototypes where the mirrors were sticking a bit, so movements were not repeatable. That appears to be solved now by using a different material to support the mirrors.

- Accuracy is going to be down to calibration. If you hang the Peachy above a bath a container, fill it with resin, and hit print, then the result is not going to be accurate. There'll be a fair bit of calibration so that the Peachy knows its own position and orientation with respect to the print bath. Once that's done it should be very accurate.

[cipher0]

Realistically, it looks like the Peachy's resolution will be more than good enough for very nice-looking parts the size of phone cases.

Thanks for the info and thats great to know.
What do you think about things like tablet cases? (can be up to 20x20cm)