Unstopable hot-end ?

Hello, i was a happy user of an RF1000 and Repetierhost 2.1.3 until my hotend died.

Then i replaced it by another hotend:

https://www.roboter-bausatz.de/999/short-distance-j-head-v6-hot-end-komplettes-kit-mit-0.5-duese-fuer-1.75mm-filament</div><div>If i start heating with the manual control of Repetier-Host, the temperature overshoots and must be disabled manually to prevent overheating!

On the RF1000 display is set 190°C, but it heats endless!

If i start heating via the RF1000 display, everything works fine.

Why???

I have never seen that before!

The repetier heat bed control is working as usual.

But not the hot end. Restarted RF1000, PC, Repetier, ...

I tried a lot (load from EPROM) but nothing helps.

The RF1000 is working, the Repetier software not. :-(

I found it!

The hot end ist to fast for the Repetier-Host!

It overshoots continuously with up to 60°C!

Maybe the resistance is wrong? I will reduce the current and it will work.

I found it!

The hot end ist to fast for the Repetier-Host!

It overshoots continuously with more than 30°C.

The RF1000 uses a 24V hot end.

My hot end seems to be for 12 V.

I put a 12 V 50 W bulb in a row and it worked perfect

(tomorrow i will order a 24V heat element).

see here :