After the Formlabs rep left and we continued to try and switch to Nylon 12 from successfully printing Nylon 12 GF for over a year…something obviously went bad.
On our 8th failed/aborted print in two days. Haven’t been successful since.
Something went bad with our doser calibration as we no longer have an excess pile up of powder along the edge walls of the roller and there is barely any powder moving across with the roller.
Happening on two different chambers otherwise at first I thought it to be a chamber leak.
I’ve done a complete n total hopper cleanout twice now and re calibrated the doser successfully and still getting the same thing.
I also +5 degrees the doser offset n same result with no improvement.
What’s weird is it is priming and preheating fine with a big pile of excess powder along back wall then when it starts printing it stops putting down the same amount of powder.
This is a new one for me…and I’ve seen and worked through a lot over the years…
Up for suggestions or anyone who maybe experienced this…of course a Formlabs rep was just here on scene last week…who knows when this will get resolved
UPDATE: Looking at it more I am wandering if there may be a heat temp issue… my heater bulbs are browning up faster than normal and I am still running my temp calibration at a -1.75c based of the temp prints. Chamber temp is reading around 178 when printing which is lower than I’ve ever printed Nylon 12 GF.
I am still running Nylon 12 at a 45% refresh rate.
Just bizarre… Been running flawlessly over a year with Nylon 12 GF. Thought the move to Nylon 12 would be even more stable with the cost savings… but its like a bunch of Gremlins hit my machine all at once
FYI… the Formlabs Blast has been absolutely amazing and I was just saying the other day how I now look forward to printing more parts because the post processing is so easy and “hands off” now…but here I am unable to print!! Haha