How do I use the big power connector for the hotend

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Aflac
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How do I use the big power connector for the hotend

Post by Aflac »

Hi,
I am setting up my Duet 0.8.5 and have run into a small problem.

I am powering my bed from an SSR so I do not need the big connector to try to power that. So I figured it would be better to hook that up to the hotend. So I have my hotend hooked up to the bed heater, with its thermistor hooked up to bed temp. and i have my bed hooked up to E1 heater and e1 temp.

I just have no idea how to work this in the configuration to get it to work that way.

any ideas?

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Aflac
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Re: How do I use the big power connector for the hotend

Post by Aflac »

Ok, I found the X paramater in the M305 to remap the temperature being read, now I just need to figure out the same thing for which heater to use.

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Re: How do I use the big power connector for the hotend

Post by 3D-Print »

Aflac wrote:Ok, I found the X paramater in the M305 to remap the temperature being read, now I just need to figure out the same thing for which heater to use.


Awesome. Not exactly sure where but there are instructions on how to make that switch somewhere in the forum.
My 3D-Printing learning curve is asymptotic to a Delta's X, Y and Z-axes

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Re: How do I use the big power connector for the hotend

Post by dc42 »

Aflac wrote:Hi,
I am setting up my Duet 0.8.5 and have run into a small problem.

I am powering my bed from an SSR so I do not need the big connector to try to power that. So I figured it would be better to hook that up to the hotend. So I have my hotend hooked up to the bed heater, with its thermistor hooked up to bed temp. and i have my bed hooked up to E1 heater and e1 temp.

I just have no idea how to work this in the configuration to get it to work that way.

any ideas?


The simplest solution is to connect the SSR control input to the bed heater terminal block. That is what I do. But if you want to swap the heaters over, that should be possible. Use M140 to specify that heater 1 is the bed heater, instead of the default heater 0:

M140 H1

In your M563 command to define tool 0, tell it to use heater 0:

M563 P0 H0 D0

Then, if you are not also swapping the bed thermistor and hot end thermistor connections, use the X parameter in the M305 commands for heaters 0 and 1 to tell it what thermistor to use for each heater channel.

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Aflac
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Re: How do I use the big power connector for the hotend

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Thanks, that helps a ton, I think it's exactly what I'm looking for

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Aflac
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Re: How do I use the big power connector for the hotend

Post by Aflac »

When looking up the gcode for the m140 I saw this note for the H parameter

1This parameter is not supported by RepRapFirmware-dc42 and other firmware.

Is this true? So this won't work running the dc42 firmware?

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Re: How do I use the big power connector for the hotend

Post by Aflac »

ok, Looks like the M140 works fine, the bed control now controls the bed, but its the only temperature in the list,

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Re: How do I use the big power connector for the hotend

Post by Aflac »

When i go to settings-tools it shows the tool i tried to create with drive 0 and heater 0, but it is not showing up in the temperature list.

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Re: How do I use the big power connector for the hotend

Post by dc42 »

It sounds to me that DuetWebControl does not expect heater 0 to be used for anything other than the bed. I'll mention it to chrishamm, however I know he is busy with other things right now so don't expect a quick fix. I suggest you revert to the conventional heater assignments for now.

I have corrected the M140 entry on the gcode wiki page at reprap.org.

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Re: How do I use the big power connector for the hotend

Post by Aflac »

Thanks, I will revert back to standard, thanks for your help.

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