Build Your Own SLA/SLS

I had similar failures due to power supply spikes from other equipment turning off or on the same mains distribution board. Fix was to unplug the other equipment and depower everything for ~ 1 minute to reset.

A followup note after a few more weeks use. The problem of increasing reactivity has largely been fixed with prints up to 50mm high. The PDMS coated dishes are lasting more than 40h of use without failures due to print adhesion to the silicone. The progressive clouding of the PDMs is similar to http...

Below is an image of the test piece I used for assessing changes in reactivity and z bleed at different heights. The bleed is seen filling the smaller holes.

Have made some useful progress to fix the problem of increasing resin reactivity during a print. To tackle this I created a tall test part with graduated small cylindrical holes to monitor bleed at different heights (see below). I tilted this at about 15 degrees from vertical and ran some test print...

Thanks - I've got an FEP flex vat and will test it. I'd found on a projet 1200 that the flexible vat is great for tall prints but tends to wrinkle and generate 'wobble' in the prints compared to the pdms.

Does this happen with the littlerp flex vat?

During printing the resin appears to become progressively more reactive. Small positive features can start to thicken by +5mm Z. Some larger prints may fail after +40mm Z and progressively adhere to the PDMS. Any advice on how to minimize this effect? Or how to taper exposure duration with gcode as ...

I've also found most dlp resins can inhibit platinum cure silicones. However I still use these a lot for rapid prototyping of small silicone components. There are some workarounds that can help: Overcure the resin as mentioned above. Typically we double the normal UV cure then do a thorough thermal ...

Using an unmodified 6150 (~1500) set up as per the little rp instructions the pixel 'resolution' was 38um. Focus was good along the lower edge and in the central regions. The image was progressively blurred in the rear corners.

I've also got ~33um pixel 'resolution' with a modified 6510BD. The modifications allow small positive features to be printed to ~100um across about 90% of the build platform. The focus still deteriorates close to the left and right borders. To improve focus across the print area required a couple of...

I also make small prototype parts. I haven't tried vorex but have tested a few other resins and currently mainly use B9 black resin. The post curing steps make a large difference to the mechanical properties of most resins. UV post cure in warm water rapidly hardens the surface of parts and makes th...