edit: custom printer with 2 hitends (generic ptfe lined and genuine e3d v6 all metal). verified same temperature. e3d v6 oozes to the point that its unusable, generic works well.
steps taken verified temps are identical with external probe changed nozzles rebuilt by to ensure no gaps checked v6 hearsink cooling changed retractions. settings.
original: I've got a custom dual extruder machine - I've calibrated the temperatures of both hotends so I know the temperatures are very accurate.
One is a regular hotend similar to an Ender 3 setup and the other is a genuine E3D v6 - and I've checked the assembly many times.
At 190 °C, my external mp probe reads 190 °C on both. with PLA at 190 °C in the Ender 3 style hotend, pushing filament through by hand is smooth but requires some push and the oozing stops very soon after. on the E3D hotend, no effort is required and it will continue to ooze filament for quite a while.
I've checked and double checked the temperature, changed nozzles, checked and double checked assembly and Bowden tube seating position and I'm at a loss as to how to get this E3D v6 to stop oozing because it seems to just drip even at low temperatures, retractions do nothing and the prints with that extruder are messy.
Any advice on how to get this thing to stop oozing would be greatly appreciated!