The messurements still were wide spread. In between 1,65 and 1,8.

But I finally examined my digital messuring tool. And by wiggling around and adjusting the spring loaded leg that presses the filament I was able to get every mesurement close to 1,75 and down to 1,65. (Made in China)

So the conclusion of all this is: It may not be the filastruder. And the filament may be totally ok. Even the ones before. But I need a more precise messuring tool.

Anyway the higher nozzle position is good as far as I can tell. The filament lays down in a much wider radius with less curving and probably is totally stiff before hitting ground.

Also the lower temperature needed produces less fume and needs less electricity.

Maybe the troubleshooting is helpfull for someone else.

But I think that there may either be too few power on the motor for constant extrusion. Or the pellets may have taken too much humidity. I have dried them before use though...

Or what was your idea about the mounting hight? Should I try more distance or less distance?

Motor looks ok too. But I had the cooler for the motor more blowing onto the gearbox instead of the motor after shifting from horizontal to vertical.

That may have caused shifts in diameter once the motor got hot.

Also the thermocouple may deserve a better fixation. It was clamped to the nozzle. But the clamp is pretty large and the thing may not have been as fix as desired. I will use the capton tape first and then a clamp instead.

With heat and space for micro movements, that may have caused problems as well.

Can it be the motor? Or the power supply? Or both?

I will see how the nozzle looks like next.

I am extruding ABS at 182degree Celsius on a vertical mount.
I have no filawinder, but the system hangs free in the room and the filament may fall freely without touching anything but the floor.

The filament diameter constantly shifts up and down from 1,69 to 1.82. I had more constant extrusions a few days ago.

I suspect one of two reasons:

I think that it is the gears worn out. (After maybe extruding only 15-20 Kilos of filament in total)
Or the system has not enough power to heat up and power the motor on a constant rate.

Has anyone tried using a better powersupply?
And what can I expect from filastruder.

I plan to inspect the gears tomorrow and change out the grease.
Also I want to take off the nozzle and see if there is any problems there.

But so far I never had good quality extrusions. Any cheap filament is way better than what my machiine has produced.