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Rat Rig Community [Unofficial]•3y ago•

3 replies

kasztimate

Timer too close or Lost communication with MCU errors

Dear Community,

I am running a RatRig Vcore 500mm with USB Toolboard.

The specs:
- Raspberry Pi4 B+ 2GB (reads 1,6GB RAM only) - 64GB Kigston MicroSDXC card - Active cooled (Mostly 45C all the time)
- EBB42 v1.2 without MAX - 3DO 2m USB cable + 2x0,75mm wire for power - 2x1mm Piano wire for umbilical + zipped so the connector does not move
- Octopus V1.1 Board
- Phaetus Rapido HF hotend
- 24V Supply
- BTT TouchScreen 5” with FCC cable + KlipperScreen

FW versions:

klipper
v0.11.0-303
KlipperScreen
v0.3.6-52
mainsail
v2.8.0
moonraker
v0.8.0-186
RatOS
v2.x: v2.0.2-15
ratos-configurator
v0.0.0-67-gc5b78c02-inferred
RatOSTheme
v2.0.2-0-g515851db
timelapse
v0.0.1-142-g57bec0de

Host Klipper version says dirty at the end: v0.11.0-303-g67499853-dirty

Also sometimes its failed to start up then I have to power cycle it 1-2 times. Also sometimes don’t get the wifi signal and starts as RatOS but the configuration is still good. After a restart it catches up with the Wifi. Signal strength should not be an issue as I have a Voron which is next to it and it starts all good. BTW they both share the same electronics and it never happened on the Voron.

My problem is sometimes I have this error message:

Klipper reports: SHUTDOWN
MCU 'toolboard' shutdown: Timer too close

And sometimes this:

Klipper reports: SHUTDOWN
MCU 'toolboard' shutdown: Lost communication with MCU

What I did already:
- Before the umbilical upgrade to 3DO cable and piano wire a lot more error happened.
- I lowered the micro stepping to 16
- Only Input shaping is enabled ADXL is disabled (its only needed for measurement) - it improved a bit.
- Restarted the printer before every print - No change
- Speeds are: 350 travel - 150-250 print
- Max access is 9000mm/s2

Can someone point me in the right direction?

Thank you guys, I will send virtual beers to all

Have a nice weekend!

Mate