Topic: Davinci JR back fan stop working
It happen after printing for 3 hour.
Usualy it work once extruder fan is running.
Tested fan power source only 4.5v available, how to fix it
- kr15_uk
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Re: Davinci JR back fan stop working
@sionghk - if you still have a warranty, contact XYZ support. If you don't then seems to be something is blown. Can you pull of the cover covering electronics at the bottom and check if nothing is blown, caps leakeked?!
3 2016-08-12 00:53:42 (edited by siongjk 2016-08-12 00:54:26)
Re: Davinci JR back fan stop working
i have just checked, no blown symptom on electric board, ohters are still work perfectly.
Only the back fan not running anymore
Re: Davinci JR back fan stop working
Here's my board, nothing looks odd
- carl_m1968
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Re: Davinci JR back fan stop working
I know it is a stretch, but I have been in a business along time dealing with cheap Asian parts which is what the XYZ printers are made off. Trust me, I had a 1.0 that I stripped every trace of XYZ from. But my point is that maybe, the fan is bad. They do die some times and the rate is much higher with Chinese fans which again is what is in this printer. The fan is not on any kind of control in fact i would be willing to bet that if it is connected to the mainboard it is simply connected to the power buss and nothing more. When the machine is on the fan is on. It's that simple. If it is connected to a control line then that would be the second flaw of Chinese stuff. Over complication which also aids in failure. That fan simply needs to run when power is on and nothing more. If that is the case then the logic that controls it has failed. That would mean either the MOSFET that switches ground has failed or the Processor itself has failed and the control line from it to the MOSFET is no longer functioning meaning the board is hosed. Your only course then would be to wire the fan directly to the power supply.
Again though I suspect the fan is bad. You could test it by taking it out and connecting it to a known good 12 volt supply. Red to Positive and black to ground of course. If it runs then your back to the logic being faulty.
Printing since 2009 and still love it!
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Anycubic 4MAX best $225 ever invested.
Voxelabs Proxima SLA. 6 inch 2k Mono LCD.
Anycubic Predator, massive Delta machine. 450 x 370 print envelope.
Re: Davinci JR back fan stop working
Just tested the fan still working. Now thinking of using external power
Re: Davinci JR back fan stop working
I have the same issue with both fans. A very quiet clicking comes from both fans on my printer. There are only 4.5 volts going through both connections on the extruder and the rear fan. Does anybody know what to do. I would rather not power them through an external power supply. Thanks!
- yizhou.he
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Re: Davinci JR back fan stop working
carl_m1968 wrote:
I know it is a stretch, but I have been in a business along time dealing with cheap Asian parts which is what the XYZ printers are made off. Trust me, I had a 1.0 that I stripped every trace of XYZ from. But my point is that maybe, the fan is bad. They do die some times and the rate is much higher with Chinese fans which again is what is in this printer. The fan is not on any kind of control in fact i would be willing to bet that if it is connected to the mainboard it is simply connected to the power buss and nothing more. When the machine is on the fan is on. It's that simple. If it is connected to a control line then that would be the second flaw of Chinese stuff. Over complication which also aids in failure. That fan simply needs to run when power is on and nothing more. If that is the case then the logic that controls it has failed. That would mean either the MOSFET that switches ground has failed or the Processor itself has failed and the control line from it to the MOSFET is no longer functioning meaning the board is hosed. Your only course then would be to wire the fan directly to the power supply.
Again though I suspect the fan is bad. You could test it by taking it out and connecting it to a known good 12 volt supply. Red to Positive and black to ground of course. If it runs then your back to the logic being faulty.
Pretty much everything in your 3d printer is made in china now, regardless the brand. you can take apart the high quality 3d print apart and found almost every part is also made in China. The only difference if whether they pass strict quality control, and that is company dependent.
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iNSTONE Inventor Pro X2, CTC Dual X2, ANET-A8, Hictop 3DP-11, Solidoodle Press, FLSUN I3 2017X1