Can anybody help me please!
I have assembled my Velleman k8200. All went well. Have installed Repetier and set printer settings as per manual. All good. Have plugged in USB and 2 leds on mother board light up OK, but when I plug in the 15 volt supply the USB leds go out. I can connect OK in Repetier but there is no response from the printer even when I attempt to move the print head using the manual control. Also no other readings from heater etc…
Any clues?
Regards,
Roger
Make sure you didn’t reverse the polarity at the 15V
Also power up the printer before connecting to USB can help.
Make sure you set the comm settings in repetier to
250000baud, and reset on connect disabled
cheers,
Christian
After connecting in Repetier you should click the [OK] button, to get response.
Thanks for your reply Christian.
Have checked polarity, powered up before USB connect, also checked baud rate.(250000) All good
Only difference now is that USB leds on motherboard now flash steadily at about 1 Hz.
Also, tried the reset button on the motherboard. I can connect in Repetier but still no response.
When I try a manual control of print head, message in Repetier is “stopped due to errors. M999 to restart”
Anyone?
Roger
So, if it connects, do you get temp readings now?
Hello again,
Yes, I do get temp readings now but…
When I connect and reset with the mother board switch, I instantly get the error message that the print bed has exceeded it’s maximum temperature (which is set at 50 degrees) The reading is about 736 degrees and shows the blue line going off the graph. When I unplug the sensor from the mother board it returns to zero, but will still not operate with this sensor unplugged.
How can I investigate and correct this faulty reading?
(I can connect and have been able to operate the fan control only.)
Regards,
Roger
[quote=“rbutton”]Hello again,
Yes, I do get temp readings now but…
When I connect and reset with the mother board switch, I instantly get the error message that the print bed has exceeded it’s maximum temperature (which is set at 50 degrees) The reading is about 736 degrees and shows the blue line going off the graph. When I unplug the sensor from the mother board it returns to zero, but will still not operate with this sensor unplugged.
How can I investigate and correct this faulty reading?
(I can connect and have been able to operate the fan control only.)
Regards,
Roger[/quote]
If it shows 736 °C when connected there is a short in the wiring of the thermistor.
If you unplug it, thus making it an open circuit, it goes down to 0°C.
The firmware disables the extruder and stops working in both cases, to prevent fire due to an uncontrolled extruder heatup.
So, measure the resistance at your unplugged extruder heater plug.
It should read about 100kOhms at room temp.
If it reads much less, there is a short.
Check the wiring and the isolation of the thermistor in the heater block.
cheers,
Christian
Thanks Christian. It is now working!!!
The y-stop wires and heater bed wires were swapped (both red and brown on the same ribbon cable)
I appreciate your help.
Regards,
Roger
[quote=“rbutton”]Thanks Christian. It is now working!!!
The y-stop wires and heater bed wires were swapped (both red and brown on the same ribbon cable)
I appreciate your help.
Regards,
Roger[/quote]
Nice to hear!
Happy printing!
cheers,
Christian