1 Topic by axp1729 (edited by axp1729 2018-06-07 17:42:04)

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Topic: DaVinci 1.0 w/ e3d temp sensor issues

Hi all, hopefully I'm posting this in the right place. I'm running a DaVinci 1.0 w/ repetier 0.92.10M. I just swapped out my stock hotend for an e3d V6 clone using the stock breakout board from the old extruder, and had it running great for a few hours, until I was in the middle of brushing off the nozzle and I noticed the temp reading had dropped down to 95 on the nozzle from a fully preheated 215, and the to reading on the bed jumped UP to 90 after being set to 65. I turned the machine off immediately because the nozzle was trying to continue heating despite already being at temp. I let it cool down to room temp and turned the machine back on and both temp readings were the same, slowly fluctuating around 90 to 95.

Now, this would make sense to me if I had bumped the nozzle thermistor and damaged it, but it doesn't make sense that the bed's temp sensor would be doing the same thing.

Things I have tried/observed so far:

- unplugging the nozzle thermistor gives no error, and the machine still displays the same temp with minor fluctuation
- Re-flashing the firmware had no effect so it seems to be hardware related
- I reseated every connection in the machine

Does anyone happen to have an idea of what may have happened? Did I possibly damage the motherboard? Some kind of short on a temp sensor circuit? Any help would be appreciated.

2 Reply by yizhou.he

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Re: DaVinci 1.0 w/ e3d temp sensor issues

check your wire harness and looking for exposed wire or melted plastic. Alternatively, unplug the thermistor from motherboard side and see if display temp become def.

(Da Vinci 1.0, Jr. 1.0 RAMPS, miniMaker) X4, (Creality CR-10S, CR-10 mini, Ender-3) X4, Anycubic MEGA X4, Anycubic Chrion X1, ADMILAB Gantry X2 (MonoPrice Maker Select V2, Plus, Ultimate)X4--Select mini X1, Anycubic photon X4, Wanhao duplicate D7 X1.
iNSTONE Inventor Pro X2, CTC Dual X2, ANET-A8, Hictop 3DP-11, Solidoodle Press, FLSUN I3 2017X1

3 Reply by axp1729

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Re: DaVinci 1.0 w/ e3d temp sensor issues

yizhou.he wrote:

check your wire harness and looking for exposed wire or melted plastic. Alternatively, unplug the thermistor from motherboard side and see if display temp become def.

Harness looks good, and I pulled out both the connection to the extruder pcb, and the connection to the bed thermistor on the main board and they both still displayed 90/95. No def error, which I have seen before when I accidentally swapped the connectors on the extruder stepper and extruder pcb. But I have had the machine working since then so I don't think that would have caused any issues

4 Reply by carl_m1968

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Re: DaVinci 1.0 w/ e3d temp sensor issues

It sounds like you may have used the metal brush while power was applied to the hotend. Most of the time this will only blow the fuse on the hotend power supply. But if the 12 volts from the hotend gets connected to the thermistor due to one of its wire shields not being in place well it will blow the AD converter on the board. If it shows 90/95 even when there is no thermistor connected then that means the that chip is blown on the main board.

Printing since 2009 and still love it!
Anycubic 4MAX best $225 ever invested.
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Anycubic Predator, massive Delta machine. 450 x 370 print envelope.

5 Reply by axp1729

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Re: DaVinci 1.0 w/ e3d temp sensor issues

carl_m1968 wrote:

It sounds like you may have used the metal brush while power was applied to the hotend. Most of the time this will only blow the fuse on the hotend power supply. But if the 12 volts from the hotend gets connected to the thermistor due to one of its wire shields not being in place well it will blow the AD converter on the board. If it shows 90/95 even when there is no thermistor connected then that means the that chip is blown on the main board.

Damn that's exactly what I did. I didn't realize you couldn't use the wire brush while the power was on, I've done that on my DaVinci machines for a few years now. The new hotend must have been more sensitive to that. Is there a way to fix the board or am I going to need a new one?

6 Reply by Tin Falcon

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Re: DaVinci 1.0 w/ e3d temp sensor issues

At his point unless the board can be repaired probably a good time to covert to ramp with marlin or repitier.

Soliddoodle 4 stock w glass bed------Folger Tech Prusa 2020 upgraded to and titan /aero extruder mirror bed
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7 Reply by carl_m1968 (edited by carl_m1968 2018-06-08 12:08:19)

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Re: DaVinci 1.0 w/ e3d temp sensor issues

axp1729 wrote:
carl_m1968 wrote:

It sounds like you may have used the metal brush while power was applied to the hotend. Most of the time this will only blow the fuse on the hotend power supply. But if the 12 volts from the hotend gets connected to the thermistor due to one of its wire shields not being in place well it will blow the AD converter on the board. If it shows 90/95 even when there is no thermistor connected then that means the that chip is blown on the main board.

Damn that's exactly what I did. I didn't realize you couldn't use the wire brush while the power was on, I've done that on my DaVinci machines for a few years now. The new hotend must have been more sensitive to that. Is there a way to fix the board or am I going to need a new one?

That would depend on your technical skill, soldering skill, and the board design. The earlier 1.0 had a discrete AD converter that was near the thermistor input. It was a small surface mount IC that could be replaced if it could be sourced. The newer version board probably has a similar layout unless they choose to use the AD converter in the processor to save space. Again though very small parts requiring very good soldering skills. As was said might be better just to consider a RAMPS conversion.

Printing since 2009 and still love it!
Anycubic 4MAX best $225 ever invested.
Voxelabs Proxima SLA. 6 inch 2k Mono LCD.
Anycubic Predator, massive Delta machine. 450 x 370 print envelope.

8 Reply by axp1729

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Re: DaVinci 1.0 w/ e3d temp sensor issues

carl_m1968 wrote:
axp1729 wrote:
carl_m1968 wrote:

It sounds like you may have used the metal brush while power was applied to the hotend. Most of the time this will only blow the fuse on the hotend power supply. But if the 12 volts from the hotend gets connected to the thermistor due to one of its wire shields not being in place well it will blow the AD converter on the board. If it shows 90/95 even when there is no thermistor connected then that means the that chip is blown on the main board.

Damn that's exactly what I did. I didn't realize you couldn't use the wire brush while the power was on, I've done that on my DaVinci machines for a few years now. The new hotend must have been more sensitive to that. Is there a way to fix the board or am I going to need a new one?

That would depend on your technical skill, soldering skill, and the board design. The earlier 1.0 had a discrete AD converter that was near the thermistor input. It was a small surface mount IC that could be replaced if it could be sourced. The newer version board probably has a similar layout unless they choose to use the AD converter in the processor to save space. Again though very small parts requiring very good soldering skills. As was said might be better just to consider a RAMPS conversion.

I am terrible with soldering and electronics haha, I'm probably going to just do the RAMPS conversion unless I can find a stock board for cheap., I've gone this far with "de-XYZing" the machine, might as well go all the way. Thanks for the input

9 Reply by yizhou.he

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Re: DaVinci 1.0 w/ e3d temp sensor issues

axp1729 wrote:

Damn that's exactly what I did. I didn't realize you couldn't use the wire brush while the power was on, I've done that on my DaVinci machines for a few years now. The new hotend must have been more sensitive to that. Is there a way to fix the board or am I going to need a new one?

I think use the wire brush for the nozzle while the power was on is OK as long as you don't brush the connection spot for heating element and temperature sensor (Can not spell that word correctly). The brush works best with hot nozzle, either brush carefully or heat the nozzle, shutdown the power and brush immediately.

(Da Vinci 1.0, Jr. 1.0 RAMPS, miniMaker) X4, (Creality CR-10S, CR-10 mini, Ender-3) X4, Anycubic MEGA X4, Anycubic Chrion X1, ADMILAB Gantry X2 (MonoPrice Maker Select V2, Plus, Ultimate)X4--Select mini X1, Anycubic photon X4, Wanhao duplicate D7 X1.
iNSTONE Inventor Pro X2, CTC Dual X2, ANET-A8, Hictop 3DP-11, Solidoodle Press, FLSUN I3 2017X1

10 Reply by carl_m1968

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Re: DaVinci 1.0 w/ e3d temp sensor issues

yizhou.he wrote:
axp1729 wrote:

Damn that's exactly what I did. I didn't realize you couldn't use the wire brush while the power was on, I've done that on my DaVinci machines for a few years now. The new hotend must have been more sensitive to that. Is there a way to fix the board or am I going to need a new one?

I think use the wire brush for the nozzle while the power was on is OK as long as you don't brush the connection spot for heating element and temperature sensor (Can not spell that word correctly). The brush works best with hot nozzle, either brush carefully or heat the nozzle, shutdown the power and brush immediately.


The sensor is called a thermistor. When your browser flags it as an error, right click on it and click add to dictionary and then it will accept that as a proper word which it is.

Printing since 2009 and still love it!
Anycubic 4MAX best $225 ever invested.
Voxelabs Proxima SLA. 6 inch 2k Mono LCD.
Anycubic Predator, massive Delta machine. 450 x 370 print envelope.