No power for heater H1

Pertti

Hi friends!
Something happened to my Duet wifi, the drive X and the heater H1 dropped down.
So I connected a breakout board and added a TM 6600 driver (drive number 5). That works fine. But what about the heater 1? is there any way to fix the problem? I need 2 extruders. All 3 thermistors give reasonable readings.

Phaedrux

@pertti said in No power for heater H1:

heater H1 dropped down.

What does this mean?

When you try and enable heater1 does the LED near the terminal turn on?

What firmware version?

Can you send M122 and M98 P"config.g" in the Gcode console in DWC and post the results?

Please share your config.g as well.

If the heater1 output is truly failed and you don't have another output available you could configure a low power output like a fan as a heater to switch an external mosfet

Pertti

@phaedrux
Thanks for help!

Led indications:
Power on

Heating H2

Heating H1

Timeout H1
configuration and console texts
M122.txt
config_g_210807 1500.txt
If H1 was lost then I have an extra relay SSR-40 DA which I reserved for 230v heatbed. Maybe then it is possible to arrange heaters using bed heater for H1.

Phaedrux

When it turns purple to show fault state, do you see any error messages in the gcode console or if you have DWC connected? It would be useful to know what the error message is. I assume it would be heater not heating as fast as expected.

Do you have an idea what happened to cause the heater and driver to fail?

There are 2 reasons the heater may fail to show a temperature increase. Either the heater output itself isn't actually turning on, or the thermistor isn't seeing an increase in temp, possible from being physically disconnected.

If you test the voltage of the heater1 output across + and - when the heater is turned on do you see anything?

Have you checked the physical state of the thermistor? If you try and heat the hot end with a heat gun or even your hands do you register a temp increase on the display?

I notice that you're using RRF2. In RRF3 is becomes trivial to reconfigure a spare output to be used as a heater output, so you could use an available fan port connected to the SSR and power the hotend that way.

Pertti

@phaedrux
Error: Heating fault on heater 1. temperature rising much more slowly than expected 1.5C/sec
My machine is a testbed. After some printhead changes I noticed that the drive X stopped working. Then I added the breakout board and connected drive 5. Soon after that I also noticed that the heater 1 is out. Maybe some shortcut, I don´t know. Sometimes many things happen at the same time.
The voltage of H1 changed very little, some mV when activated.
The thermistor reacted my hand warm touch.

So perhaps RRF3 would be an interesting start point for further studies.
But that´s an other thread. Thanks anyway.