PT100 with a Duet-3-6HC & Tool-Board-LC1 ?
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As per the title
The Board is a Duet-3-6HC with a Toolboard-LC1 (v1.0) mounted on the head.
I have a 2 Wire PT100 which I want to install.The sparse documentation that there is, is as clear as mud. So what’s the actual procedure for connecting a PT100 with the toolboard-LC1?
The documentation lists to use a Max31865 daughter board with the Duet-3 and there is an intimation that the MAX31865 should be plugged in to the expansion board but that seems to point to the 3HC expansion board, and nothing shows up for connecting a PT100 to a toolboard-LC1 (or anything specifically saying you CANT)
I think there is x3 scenarios
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The toolboard-LC1 can take a PT100 without the daughter board? If so how is that supposed to be wired and where can I find the wiring diagram?
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Or you can wire the daughter board into the toolboard-LC1, and again if so how is that supposed to be wired and where can I find the wiring diagram?
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Or with a toolboard-LC1 you are required to install the daughterboard on the main board and run 2 wires to the tool-head.
I have thought of a 4th possibility which would be my preferred choice if the toolboard-LC1 can accept a daughterboard. I also have a FYSETC PT100 Amplifier Board which show the input side as 5V, SIG, GND and output to the PT100.
Would it be possible to connect the FYSETC amplifier board to the toolboard-LC1 to the IO2 socket? that socket seems the most likely candidate having +5V, io2.in, GND pins on it.
If that is possible my next question is how should the M308 command be configured to allow this to operate correctly?
I am thinking
M308 S1 P P"121.IO2" Y" rtd-max31865"Anyone from the Official Duet Support team care to comment.
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I don't think PT100's are supported for the toolboard.
Two thermistor or PT1000 inputs (Temp0 and Temp1). One (input Temp0) uses a 16-bit ADC for high resolution reading of PT1000 sensors. -
@JayJay You have to use the PT100 daughter board on the 6HC. The 1LC desn't have any connections for a PT100 daughter board.
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@Stephen6309 said in PT100 with a Duet-3-6HC & Tool-Board-LC1 ?:
@JayJay You have to use the PT100 daughter board on the 6HC. The 1LC desn't have any connections for a PT100 daughter board.
I know the LC1 doesnt have a 2 row 5 pin connector, which is why i asked if it would be possible to throughput the FYSETC amplifer on IO2 back to the main board.
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@JayJay Check the firmware source code to see if a PT100 daughter board is supported on the 1LC. If it is, you might be able to determine how to connect it.
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@Stephen6309 said in PT100 with a Duet-3-6HC & Tool-Board-LC1 ?:
@JayJay Check the firmware source code to see if a PT100 daughter board is supported on the 1LC. If it is, you might be able to determine how to connect it.
That is an option but a real waste of time, when all it takes is for someone from the duet support team to advise if i can throughput the signal from the the FYSETC amplifier back through the toolbaord to the mainboard or not.
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@JayJay said in PT100 with a Duet-3-6HC & Tool-Board-LC1 ?:
s why i asked if it would be possible to throughput the FYSETC amplifer on IO2 back to the main board.
pt100 sensor need an spi bus which io2 can not provide.
i would suggest getting a pt1000 sensor
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@Veti said in PT100 with a Duet-3-6HC & Tool-Board-LC1 ?:
i would suggest getting a pt1000 sensor
Thats not happening, if the supposed best control board cant accept an analog input from a P100 amplifier thats a pretty poor show.
I would rather rip out the Duet-3 , install the 32bit GTR PRO V1.0 and run Klipper/Octoprint with the dwc2-for-klipper-socket, a board I know is going to accept an analog signal.
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@JayJay that may be the way to go then as it won't be getting PT100 support. not enough room for all the components
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@jay_s_uk said in PT100 with a Duet-3-6HC & Tool-Board-LC1 ?:
@JayJay that may be the way to go then as it won't be getting PT100 support. not enough room for all the components
Everyone seems to be missing my point, and the reason I asked for someone from offical support to comment
which is (if other options are not possible): can i throughput a single wire analog signal to the mainboard via the toolboard or not.
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no, you can't.
plus, look at the limitations... https://duet3d.dozuki.com/Wiki/Duet_3_firmware_configuration_limitations#Section_Permanent_limitations -
@jay_s_uk said in PT100 with a Duet-3-6HC & Tool-Board-LC1 ?:
no, you can't.
plus, look at the limitations... https://duet3d.dozuki.com/Wiki/Duet_3_firmware_configuration_limitations#Section_Permanent_limitationsAnyone want to buy a Duet-3 ?
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you should get some fairly good response on ebay. not many get sold second hand so theres a good market
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@jay_s_uk said in PT100 with a Duet-3-6HC & Tool-Board-LC1 ?:
you should get some fairly good response on ebay. not many get sold second hand so theres a good market
ebay.. ewwww no thank you, thats just asking to get bent over forwards when someone makes spurious claims about nothing to ebay
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well i'm sure you have a good bin located in your workspace
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@jay_s_uk said in PT100 with a Duet-3-6HC & Tool-Board-LC1 ?:
well i'm sure you have a good bin located in your workspace
aint that the truth , a somewhat sad state of affairs when that is all the supposed best is use for.
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i on the other hand have no issues with my duet 3 or with any of my other boards running RRF
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@jay_s_uk said in PT100 with a Duet-3-6HC & Tool-Board-LC1 ?:
i on the other hand have no issues with my duet 3 or with any of my other boards running RRF
lucky you, but I suppose its too much to expect for it to do something so simple, and will be looked upon much like the "special use case" deckingman endures.
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what do you have against pt1000 sensors?
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@Veti said in PT100 with a Duet-3-6HC & Tool-Board-LC1 ?:
what do you have against pt1000 sensors?
Nothing, but I already have PT100 sensors, PT100 amplifiers and even a genuine Duet PT100 Daughter board, so why should i buy (and wait months) for more components when even a simple ramps based boards can accept a single wire analog signal.
And when i also have a few GTR V1.0 boards, if im going to have to rewire anyway why should I stick with the Duet if it cant do simple things.
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@JayJay none of us are stopping you from changing.
just please don't install the version of RRF for the GTR as I'd rather not have to help you with support -
@jay_s_uk said in PT100 with a Duet-3-6HC & Tool-Board-LC1 ?:
@JayJay none of us are stopping you from changing.
just please don't install the version of RRF for the GTR as I'd rather not have to help you with supportWhich part of Klipper/Octoprint is RRF ? i dont think it does have a RRF component in it, the best thing that was going for the Duet was the DWC and the fact that Klipper can now run DWC means people are no longer tied to the hardware to run the DWC.
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@JayJay thats good. if you don't know about the STM port of RRF, I won't tell you
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@JayJay said in PT100 with a Duet-3-6HC & Tool-Board-LC1 ?:
@jay_s_uk said in PT100 with a Duet-3-6HC & Tool-Board-LC1 ?:
i on the other hand have no issues with my duet 3 or with any of my other boards running RRF
lucky you, but I suppose its too much to expect for it to do something so simple, and will be looked upon much like the "special use case" deckingman endures.
I saw my name mentioned. For what it's worth, I used to run PT100s on my gen 2 Duet Ethernet but ditched them long ago (well before I "upgraded" to gen 3) and reverted back to simple thermistors. They were just more trouble than they were worth IMO. The main problem being susceptibility to noise which I never fully cured (tried 4 wire mode, screened cable and all that stuff). PT100s may be inherently more accurate but if the signal is noisy, that simply negates any benefits.
I've made it fairly clear that I'm not the biggest fan of Duet Gen3 but personally, I wouldn't use the lack of support for PT100s as a reason to ditch it.
