[quote=“kuraasu”]Hi Fred_Gofton,
sorry for the perhaps late reply, but the this measurement - at least in my opinion - brings the power supply back into troubleshooting focus. If you already sent the controller board, did you include the supply?
Cheers,
kuraasu[/quote]
Due to the cost of posting the power supply was not included.
After extensive testing and trouble shooting it appears the a2d converters on the pcb are the problem.
If there a direct email address which I can contact you with to confirm the pcb arrived with yourselves?
Regards,
Fred
hello,
Velleman returned the control pcb, but im not certain if its a replacement or if it was just tested - there was no paperwork!
The control pcb has been installed and reconnected.
When i try to connect (baud rate 250000, reset on connect is disabled) repetierHost shows 5 commands waiting and the temperatures are 0.00 oC for both heatbed and extruder.
Can anyone provide any light?
Thanks,
Fred
Hi Fred,
considering your previous statements about the power supply, I’d suggest you try to get your hands on another supply for testing. You’ll need 15 V and at least 6.7 A or 100 W to drive the printer.
A 12 V supply with minimum 80 W should work, too, at least for testing the PC connection, motors, etc.; the heaters will be limited in this case, so “real” printing might be difficult.
Cheers,
kuraasu
Hi,
After much headscratching I finally got it to work again!
I started from fresh trouble-shooting, but the connection would only hold for around 3 seconds, so i set the baud rate to 115200 in config.h and reflashed it: the connection is now solid BUT… it seems one of Pololus was damaged while away - the adjuster used to calibrate the voltage was missing its head, so the x axis stepper was getting 0.935 volts!
Ive had to order another one, but i dont understand why the Pololu was damaged, it looks like someone took a drill to it!
Im concerned that the connection problem will resurface - i spent a lot of time and effort in fixing this and it now appears the psu is problematic - it squeals a lot while the heatbed is heating up so im going to use a modified 300 watt atx psu.