Frequently blocked hot-end? Here's my solution

I have a UM2 with Olsson block, and print mostly with ABS, but what I am about to say could apply to any machine and material. I bought my UM2 in 2014, and began with PLA, but soon switched to ABS for its superior strength (not to be confused with stiffness), working temperature, and resistance to water. This is because most of my models have mechanical rather than ornamental use, and can easily be strengthened by using an acetone-dipping technique. After a couple of mont

Hi vitalsparks, Have been reading your interesting post and did the same test as you did when reading the temperature inside the nozzle using chromel alumel thermo couple. I did this because it was convenient, as I did a check of the hot end after some 2o hour printing with nylon first time at 256 deg. Celsius. Here is the result from my setup: Set Temp. UM2 Nozzle Temp. UM2 Measured temp ext. instrument. deg. C deg. C