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.

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.

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

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.

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?

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

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.