Well I finally got the pro built - lots of redo with limited instructions.

I turn on the Kossel Pro and the extrude head comes down and touches the plate in several places. Then it moves off the plate and trips the touch guide and freezes - on the matter android phone app it says the extruder heat is 650 degrees to 8oo degrees - but is cold. The glass plate is cold.

We hit the Y+ Y- buttons on the app and nothing happens - my son hears a whine coming from the machine. We hit the release button and the whine stops but still no movement on the extrude head.

We have double checked wires and even putting in several c codes we cannot get the extrude head to come down. We click on the home button - it rises to the top - does a little jig as it touches each button and then stops.

Any suggestions?

Joe Buzzitta said: ↑
I pulled the therminstate and put a meter on just the ends - the old one and the brand new one both show 15.ohms (No where near the 100k ohms) The ohm meter is set on the lowest setting which is 200
That's wrong....set it to a value > 100kO. Most of the multimeters have 200kO. Then measure again!
grainiac, Yesterday at 9:26 PM #5
Jake Buzzitta
Jake Buzzitta
New Member
Hi Grainiac,

Thank you for responding, the value is set to the minimum in order to get a reading, if I set it to 2k or 20k it reads in the .1 or .01 range it is literally 15 ohms, not 15k.
Jake Buzzitta, Yesterday at 9:38 PM #6
grainiac
grainiac
Active Member
If you can rule out false measurement I'd say both of your resistors are fried. :(

How do I order two more thermastates?????