Hi Ladies & Gentlemen
Recently I’ve been Experiencing the heating problem on my Bot. I tried uploading new firmware, but nothing seems to fall into place. Please advice me on this on how to go about fixing it.
Much Appreciated.
Hendrick
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The error might be because the mighty board was unable to detect a thermistor. To fix this, check the connector which is plugged to back of your print bed. This should be visible right below the wanhao logo inline with the z axis spindle. Check if the connections are intact. And if the conmection seems fines, unplug the connector. Mind that there is a clip on the lower end of the connector and needs to be released to disconnect. Check if any of the ends have carbon deposits ,this might be due to fluctuating voltage. Ensure you clean it out or replace it , then reset your machine. If the problem was not with the connector on the bed, then you might have to check for the thermocouple connectors on the main board. If the problem continues even after this, it should be with the thermistor on the reverse side of the bed.
Please explain by reverse side of the bed cause I cannot get it going
The under side of the bed. You need to unscrew it from its the bed leveling wing nuts to get there. Have you checked all the connectors?
Have you got the platform heating turned on in the printer firmware?
Here are a few pics of a MUCH needed upgrade to the HBP on the Duplicator 4…basically, the 6 pin connector will eventually char/burn due to the amperage traveling through the cheapo power/ground wires the printer came with. Most of us Dup4 owners have had this issue after so many hours of printer use.
The best thing to do is to solder slightly thicker gauge wire directly to the HBP PCB at the power/ground positions (heated build plate printed circuit board) and replace the 6 pin connector header with a 4 pin header and a 4 pin connector on the cable side. Ensure you “tin” the ends of the wire as well to help alleviate any further degradation of the connection.
The 1st pic shows my original Dup4 mightyboard with a charred main power connection (prior to my fix of soldering the power wires straight to the board due to a completely fried terminal)
Thanks Humbl3, will look into it.
I’ve checked all the connectors and everything seems fine, will proceed to the underside of the bed and see what’s cooking. Thanks Ramanathan_Radh
Hi Humbl3
Since my terminal isn’t fried, do I have to take it out or leave it as it is?
thanks to everyone of you guys who helped me fix my bot. Much appreciated and may the Lord Almighty Bless You Continuously. Amen
Special Thanks to you Humbl3. You r the reason my bot is working right now. Thanks a lot and keep well bro.
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Glad to have helped mate!
I would source new replacement terminal connectors for the HBP and mains power connections on the mainboard plus I would source the 4-pin molex connector and 4-pin header for the PCB (I will post the Digi-Key part numbers shortly) and then I would replace those ASAP. Also, I recommend increasing the HBP and mains power wires a couple gauges in size to help reduce heat caused by all the amperage.
I found it best to solder the HBP power wires (thicker gauge) directly to the heated build plate as in the pics I posted above…since doing so, I have not had any issues with my HBP. Do your best to make as clean a solder joint as possible otherwise the HBP may oxidize due to the heat build-up at the solder-connection.
Hi Humbl3
Please post the Digi-Key numbers for me when you got a moment and can you please send me snap shots of the terminal connectors for the HBP and mains power connections on the mainboard together with the4-Pin Molex connector and 4-pin Header for the PCB. Shot a lot dot…
Here is a link to a post I just made with the Digi-Key links to the crimp pins, connectors and headers…
https://groups.google.com/d/msg/wanhao-printer-3d/xWGEezbtqes/da0L1sfwBgAJ
