Recent Upgrade to DuetWiFi w/ DC42 IR z probe

TwoTone

FW is 1.17e (2017-02-10)

I just notice that While H1 worked for the Hotend
H0 which I thought was the bed returns a bad parameter error.

I tried H2,3, and 4 - they don't return an error but don't heat the bed.

dc42

FW is 1.17e (2017-02-10)
I just notice that While H1 worked for the Hotend
H0 which I thought was the bed returns a bad parameter error.

I tried H2,3, and 4 - they don't return an error but don't heat the bed.

What is the command containing parameter H0 that returns an error?

TwoTone

M303 H0 S130
Also tried without the S parameter.

dc42

Strange, lots of people have tuned their bed heaters using a command similar to that.

TwoTone

I just remembered that the directions I followed for upgrading had the positive end of the bed wired directly to the PS and only used the negative for control connected to the Duet. Could that be the issue?

dc42

@TwoTone:

I just remembered that the directions I followed for upgrading had the positive end of the bed wired directly to the PS and only used the negative for control connected to the Duet. Could that be the issue?

That's for the case in which you have a separate power supply for the bed - is that what you have?

TwoTone

No I have one PS for the entire printer.
But I just rewired it so that both bed wires are connected to the Duet and still get a bad parameter error.

dc42

What is the exact command you are sending?

Have you by any chance previously disabled the bed heater by sending M140 H-1?

TwoTone

M303 H0 S130

No I haven't disabled the bed heater. It still responds if I send a Temp to in the web interface.

dc42

I found the problem. The default maximum bed heater temperature is 130C (send M143 H0 to display it). So you need to either use a lower target temperature in your M303 command, or increase the allowed bed temperature by sending e.g. M143 H0 S140 to increase it to 140C.

I'll change the error message to make it more informative.

TwoTone

Thanks for your help.

So now I'm getting Auto tune cancelled because temperature is not increasing.

But the temp was increasing from 22.0 to 27 before it canceled.