Noob question, as I can’t find a definite answer in my search:
Does anyone know (or can calculate) the max safe extruding temp for the Ubis hot end on my PrintrBot Simple?
I got some Taulman “Build” nylon, and I’d like to give it a try, but I think I’d have to get the end much hotter than the PLA I’ve been using.
@Brook_Drumm should have the ultimate answer. I’ve had the Ubis hot end on my Plus V2 up to about 250-60 (by accident) from memory. I believe all Printrbot’s have the same Ubis hotend…
I regularly print at 235, and have accidentally gone to 250 once. The “build” looks like it is supposed to be printed from 235-260, so I think you can probably print it. That being said, I’ve seen pictures of ubis meltdowns, and you should be very careful to slowly and incrementally increase your temperature until you reach a normal extrusion rate.
I think the limiting factor is the melting point of your PEEK / PTFE liner (if you have one)
I’m fairly sure the melting point of PTFE is 265C? But don’t quote me there! Google will tell you - AND you want to stay away from that! ie. Don’t set your hot end to 260 and assume it’ll be fine!
FWIW I print nylon using a PTFE liner between 230-240 without problems (only printed a phone case and a few small parts though)
I’m thinking an e3d is in my future. Even the RigidBot I’m getting has a PTFE liner in its hot end. Maybe I’ll go all the way and get two for dual-extruder on the RigidBot. 
I saw my first e3d in real life earlier this week…
Makes my hot end look like a thread with a hole in it… (oh wait - it is!)
But they look “quality”… like, I don’t think stratasys even use hotends that good 
Hot ends with PTFE and PEEK should stay below 250C. I’d say at least 5 degrees below, more if your thermistor isn’t closely-coupled to your heater (for instance, I would keep a Makergear hot end below 235C).
Thank you sir
@Jarred_Baines I recently invested I’m a e3d hot end and they are indeed high quality. It heats up faster than any other hotend I’ve seen, which of a plus.
@Whosa_whatsis Thanks for the safety tip.
I think I’ll try it at 240C. If that doesn’t work, maybe Ill wait for an e3d hot end.
Sanjay Mortimer has pushed his e3d hotend to up to 400 c and has no problem at such high temperatures
@Ethan_Hall not with the stock thermistor, though, which tops out at 300C. But with a high-temp thermistor (up to 500C) or a thermocouple, there is no doubt that the only limiting factor will be the slowly melting aluminum heater block (past about 650C).
ha ha ha…
New e3d disposable hot-end.
“Printing in aluminium”
Sorry this is for RigitBot - I haven’t see resolution question in weekly questions aggregation.
How come you missed it?
Is it possible for you to open WEEKLY QUESTIONS AGGREGATION open at least few days after rigidbot weekly updates?
@Klemen_Zhivko Wrong community, but I’ll answer here:
The resolution question was answered: 100 microns. Aggregation posts are open Tuesday through early Saturday (US Central Time) each week.
If you have further questions, please comment on this week’s post.
I saw that, but that’s z coordinate isn’t it? What about x and y?