I have been working with our SLA printer (Facture Draken) for a couple weeks now printing in makerjuice waxcast. . I have had some successful prints, but the majority (80%) end up as pancakes stuck to the bottom of the resin tray. Some others break in half mid print.
I have experimented with laying my models (round circular diks) flat on the build plate, but most of the times I place them on supports which stem from a square baseplate.
It seems clear to me that there is allot of force being put on the models while curing on the bottom of the resin tray. I have noticed that printing objects with a larger projection area are more likely to stick in the vat. I assume this is because of the increased contact with the tray. Usually it seems ~10 layers are built before my baseplate breaks away.
Things I have tried
- Pulling out the build plate, cleaning it with Acetone. Sanding it with 80 grit sandpaper.
- Emptying the resin tray and replacing with new resin.
Upping base-layer cure-time from from 30seconds up to 3 minutes, and variations between.
Upping base-layer count from 2 to 4.
- Rotating model base 45% to start the tray peel process from a corner rather than from a long edge to reduce initial tear force.
Anyone with experience got more suggestions on how to continue troubleshooting?
I also had issues with the first layer sticking to the build plate and I did not want to sand the plate. As most people will mention you need to make sure that your plate is perfectly level and the z height is right (lots of friction on the paper). You also need the correct exposure times for your resin and the first few layers should get 60 seconds of exposure. PRO TIP to improve bed adhesion: apply a thin layer of resin to the build platform before you start to print. I have not any failed prints after I started coating the plate with resin. Also, I don't completely clean the plate between prints, I make sure it is still sticky. I hope this helps.