Was working.. Now communications errors.
Hi.
Ok - my set up
Raspberry Pi 3 using the latest Image from the Repetier Server site.
Repetier server up and running ok
Printer is Tevo Black Widow connected to Pi using USB
I had loaded a job on to the Pi and told it to print. It got about 6% in and then started to run this to the log. Printing very slowly, about one move every 3 seconds
Can anyone help?
Many thanks
Dave
Ok - my set up
Raspberry Pi 3 using the latest Image from the Repetier Server site.
Repetier server up and running ok
Printer is Tevo Black Widow connected to Pi using USB
I had loaded a job on to the Pi and told it to print. It got about 6% in and then started to run this to the log. Printing very slowly, about one move every 3 seconds
Can anyone help?
Many thanks
Dave
12:03:28.979: Warning: Communication timeout - resetting communication buffer.
12:03:28.980: Connection status: Buffered:94, Manual Commands: 1, Job Commands: 5000
12:03:28.980: Buffer used:94 Enforced free byte:41 lines stored:4
12:03:32.986: Warning: Communication timeout - resetting communication buffer.
12:03:32.986: Connection status: Buffered:110, Manual Commands: 2, Job Commands: 5000
12:03:32.986: Buffer used:110 Enforced free byte:41 lines stored:4
12:03:36.991: Warning: Communication timeout - resetting communication buffer.
Comments
This serial-usb error does happen sometimes if power is not stable. Pi is very critical on it and it seems on some boards the counterpart as well. So if usb 5V gets 4.5 or maybe less for a short while it can cause such hangs. As a first test try a powered usb hup between pi and printer. pi power needs a 2.5-3A 5.1V power (yes better a bit more then 5.0 as it seems. Some power adapters are specially marked for pi to solve power problems). It is also the source of many instability problems.
I am using a certified Pi power pack and the printer is plugged in to the raspberry pis USB. No hub
Many thanks
Anyway - I will do some more tests tomorrow. Many thanks for all of the advice
A nice test with repetier-firmware is
M111 S24
which makes firmware just ack all gcodes. So you get no disturbance form all power sources and print is fast (not printing) and normally error free.
If that works you could try
M111 S14
which is printing in dry run mode. Only stepper motors get power no heating. So light power usage. Full execution of all commands. Still normally no problems.
It looks like it was a poor quality USB cable. The above tests will be very helpful to dianose any other issues I am having exp with some of the mods I am doing to my printer.
Again thanks for your help
Dave