INFI-20 SainSmart Belt Printer Update (Patreon)

My INFI-20 developed a clog about 12 hours into a 14 hour print. Turns out the hotend has a short PTFE insert similar to Prusa Mini or Luke Hatfield fix on Ender 3. The PTFE wasn’t tight enough and got a filament clog between the PTFE and Nozzle. The design is not a Creality clone. It’s different. And not necessarily in a good way.

But it got worse. I tried to remove the top coupling but it snapped off. It was very weak. I was able to get the threaded piece out but when I tried to put a new one in (they included) that one snapped off with very little force. Their couplings are very fragile.

So this machine now has to wait for a new hotend assembly from China. I can’t say I’m impressed with this hot end. It was printing great though before the clog but the design is very marginal. I think a hotend upgrade will be a first step for anyone who buys one of these.