Hello, just built the K8200, was running through start up tests, all going well until I tried to activate the extruder motor, it clunked once and then nothing, I checked the wiring, tested again, same result, checked wiring at the circuit board all was ok, powered the printer up again and now nothing at all, I now get an error saying:
serial com error: system.io.ports.serialerrorreceivedeventargs, can anybody help. thanks deafoldgit
Try again with disconnected extruder motor.
Does it come up responsive then?
cheers,
Christian
Your printer can’t connect trough the USB port. What baud-rate did you set in the Printer settings? Is the com port Ok?
Once on, did you try pushing the reset button?
Hi, baud rate is set to 250000, I unplugged the extruder motor and nothing, I have 15volts to motherboard, red and green LED are on even when I turn on mains power, another green LED flashes twice, no power to any motors, hotend, fan or hotbed, drivers installed ok, computer can see printer, repetier can see printer, windows 8.1 64 bit, at the bottom of Repetier it says connected to k8200, extruder 0.00c/ 190c, if that. I no longer get the message: firmware marlinV1; sprinter/grblmmashup etc etc. hope this helps
What do you mean by 0.00c/190C ?
Does it float between?
Hi, no its at o degrees, target temperature is 190 degrees
Then check your extruder thermistor and wiring for shorts.
If the extruder is at 0C the printer will shutdown. This is a security feature in marlin.
Hi, just checked thermistor, I am getting correct reading when using multimeter
did you measure at the plug or directly at the thermistor?
at the thermistor
Check at the plug and check if there isn’t a bent contact in the plug.
You might want to check the 5 volt regulator to see if it’s over heating and outputting 5 volts.
Sounds like the CPU is not getting any voltage.
Hi, don’t know what the 5v regulator is, I am only getting 1 volt on the fan pins on circuit board and the reading for the thermistor at the plug is: 65 with multimeter set on 200k
You need to unplug the thermistor connector (THERM 1) and then measure on the plug, not on the controller pins.
Are you sure your fan was on at 100% when you measured the voltage?
I think 5 volts runs through one of the end stops
Unplug one of then power the printer and measure the pins
That may tell you a lot.
Hi, voltage on the Y stop measures 0.60v, thermistor reading at the plug is: 166.6
166.6 Ohms or kOhms?
If the printer was powered you should have read about 5V on the +endstop pin to ground.
There is a 5v pin on the solder pad lines for the LCD controller.
Measure from there to ground.
Hi that measures 1.6 volts
Then your 5v regulator is dead or there is some short in the wiring.
Measure again with all motors, endstops and heaters/fans disconnected.
Hi, same reading 1.6 volt, everything unplugged from the board