Thanks everyone - I'll try the suggested wiring.

Yes

• When when Bed is first connected to the powered board; White/Green = 0v
• When bed heat is turned on via Pango Console; White/Green = 5v
• Bed starts to heat up. Red HEAT LED lights, the board is warmer to the touch, and the console reports rising temp

@rjenkinsgb said in Kodama Trinus heated bed wiring help:

at may be a PWM input, as black ap

Robert - Thanks for the reply.
Nothing happens with green grounded. And I'm not sure how to send 5v to green
But...
I've now got the board and bed on my bench connected to my PC.
So I can control the board via the slicer and read voltages.
When connected to the board and with Bed Heat OFF, the bed shows 12 v across Red/White and Red/Green
When Bed heat is turned ON Red/Green shows 7 v.
Does this tell you anything?
c
I would just be happy to hack the Bed so that it comes on with power. I could then add a thermistor and use the duet to control temp

The LEDs do indicate temp level.
I assume it's a 12v bed since the power supply is 12v.
The old slicer (Pango) allowed for different bed temps so I again assume that there's some sort of temp temp sensor on the bed (?).

A lot of assumptions I know!

I know the safe thing to do is to get a new bed. But I wanted to avoid this since I can't find a replacement with the right 3 hole pattern and I'd have to craft one from scratch.

So I'll explore this a little more and see if I can decipher what's going on. I'll let you know.

[EDIT] FYI - When I connect Red/White to 12v, the green power light illuminates and the first 2 temp LEDs light up. Temp does not increase

I was looking forward to driving this old printer with a new Duet but if it doesn't work out, I've got other uses for this great board.

Your help is greatly appreciated

Zero luck on any datasheets/schematics for either the bed or the board that this was connected to. It's 5+ years old.

There's resistance on 3 of the pairs

Black/White 106k
Black/Red 112k
White/Red 6k

BOTH Black/White and Black/Red decrease with heat.
White/Red stays constant

Can I assume
Green/Red = Power
Black/White = Thermistor?

Thanks for the help!

Hi.
I’m adding a duet 2 to my old Kodama Trinus printer and I’m stuck on
how to wire the Panowin Heated bed (if it’s even possible).
There are 4 wires comming from the bed - black/green/white/red.
Is it possible to wire this bed up to a duet? And if so, any thoughts on which leads are the thermistor?

Thanks