What’s an affordable (but accurate) way to remotely test the temperature of this extruder? I want to see how exaggerated this inaccurate Marlin thermistor table is for a QUBD hotend.
Harbor freight sells a $25 ish meter with a temperature sensor Type K thermocouple.
I’ve used hand-held remote sensors to check freezer temperatures. Can someone tell us how good they are at bed temps?
Yup. I bought that 5 years ago and the thermocouple finally broke last week. Great value. It runs on a 9v battery that lasts a couple years but is a little hard to get to.
I got an IR temp gun with a laser pinter from Princess Auto do $25. (Power Fist I think). Tested it against the $300 Fluke we have at work an it is just as accurate.
If anyone can link me directly to one of these, awesome. Cant find with a similar description on harbor freight or princess auto.
If no Harbour fright nearby try Sears.
I like these better than the more expensive ones. The only trick is that if you want a really accurate point measurement (rather than an average over a CM or so of wire), you need to make sure the two wires are not twisted or touching after they leave the insulation. If you do this, they will give you a better and faster point measurement than the ones with a fancy-looking probe increasing its thermal mass.
Just to update everyone on this, I got leaking after switching to a honeywell. I installed a new 1.75 barrel/nozzle and that instantly worked like a charm. We are getting reliable extrusion, with no x/y issues (so far) on the larger 9" build platform that can later be expanded to 12".
The problem boiled down to shotty build quality from QUBD. I swapped nearly everything to get that thing working so lesson learned about their hotends. All I kept were the motor, fan, grill and mounting block.