On my Printrbot Simple Metal, the sweet spot on the particular PLA I'm using seems to be about 195c at least for white. But, I hear with the VB3 it's 210-225. I assumed 195 is 195 for melting the PLA but it's sounding like it's not apples to apples between the two machines. Do I really need to be at 210 give or take on the M2 with the same filiment? I'm looking for a good baseline to start.
Thx!
VB3 Extruder Temps
Re: VB3 Extruder Temps
dklassen,
Yes. The design of the V3B has the thermistor above the heater in the block, not on the tip of the nozzle like the V3 had. There is some heat loss / thermal gradient between the heater and the tip of the nozzle -- about 15 to 20 degrees C difference. So you need the thermistor to be at 215-ish to have block hot enough to keep the tip of the nozzle at 195-ish.
I suspect if you pulled the thermistor from the block and taped it to the nozzle with Kapton tape, it would work more like the V3. (The block would still be at 215, but you'd be measuring and controlling the actual nozzle (near the tip) temperature. (I'll have to try that sometime....)
Dale
Yes. The design of the V3B has the thermistor above the heater in the block, not on the tip of the nozzle like the V3 had. There is some heat loss / thermal gradient between the heater and the tip of the nozzle -- about 15 to 20 degrees C difference. So you need the thermistor to be at 215-ish to have block hot enough to keep the tip of the nozzle at 195-ish.
I suspect if you pulled the thermistor from the block and taped it to the nozzle with Kapton tape, it would work more like the V3. (The block would still be at 215, but you'd be measuring and controlling the actual nozzle (near the tip) temperature. (I'll have to try that sometime....)
Dale
Re: VB3 Extruder Temps
Makes perfect sense. Thanks for the explanation.