LR4 stop in the middle of cutting

Przemek · February 1, 2025, 3:25pm

Hey,

I’ve come across a very annoying problem with my LR4. The problem occurs randomly, but usually during long cuts >30 min and in random places. I read everything about similar issues in this forum but unfortunately any advices didn’t help.

I’m aware about electritan noises, vacum ,crossed wires in jackpot but no… I turned off all tools which can potentially impact - no effect.

My LR uses Jackpot from official store, I connecting and making cuts by Fluid web page (AP mode).

No issues, are displayed in consol. At some point the commands are not processed (desktop command window) and it looks like the website and jackpot hang… No reaction to any command. To start CNC I have to restart fluid or turn off jackpot, unfortunately this means I always lose cuts

If you have some idea, what to check, let me know, currently, unfortunately I’m worry to use cnc today I spent almost all day to cut one easy platform , no success - 5 cuts - all failed.

and log from $SS command (when I refresh page) I can send command, and $SS works, but any command for machine no work - no reaction

$SS
[MSG:ERR: Showing startup log from previous panic]
[MSG:INFO: FluidNC v3.9.1...
[MSG:INFO: Compiled with ESP32 SDK:v4.4.7-dirty]
[MSG:INFO: Local filesystem type is littlefs]
[MSG:INFO: Configuration file:config.yaml]
[MSG:INFO: Machine LowRider]
[MSG:INFO: Board Jackpot TMC2209]
[MSG:INFO: UART1 Tx:gpio.0 Rx:gpio.4 RTS:NO_PIN Baud:115200]
[MSG:INFO: I2SO BCK:gpio.22 WS:gpio.17 DATA:gpio.21]
[MSG:INFO: SPI SCK:gpio.18 MOSI:gpio.23 MISO:gpio.19]
[MSG:INFO: SD Card cs_pin:gpio.5 detect:NO_PIN freq:20000000]
[MSG:INFO: Stepping:I2S_STATIC Pulse:2us Dsbl Delay:0us Dir Delay:1us Idle Delay:255ms]
[MSG:INFO: User Digital Output: 0 on Pin:gpio.26]
[MSG:INFO: User Digital Output: 1 on Pin:gpio.27]
[MSG:INFO: Axis count 3]
[MSG:INFO: Axis X (3.000,1263.000)]
[MSG:INFO: Motor0]
[MSG:INFO: tmc_2209 UART1 Addr:0 CS:NO_PIN Step:I2SO.2 Dir:I2SO.1 Disable:I2SO.0 R:0.110]
[MSG:INFO: X Neg Limit gpio.25]
[MSG:INFO: Axis Y (3.000,2483.000)]
[MSG:INFO: Motor0]
[MSG:INFO: tmc_2209 UART1 Addr:1 CS:NO_PIN Step:I2SO.5 Dir:I2SO.4 Disable:I2SO.7 R:0.110]
[MSG:INFO: Y Neg Limit gpio.33]
[MSG:INFO: Motor1]
[MSG:INFO: tmc_2209 UART1 Addr:3 CS:I2SO.14 Step:I2SO.13 Dir:I2SO.12 Disable:I2SO.15 R:0.110]
[MSG:INFO: Y2 Neg Limit gpio.35]
[MSG:INFO: Axis Z (-297.000,3.000)]
[MSG:INFO: Motor0]
[MSG:INFO: tmc_2209 UART1 Addr:2 CS:NO_PIN Step:I2SO.10 Dir:I2SO.9 Disable:I2SO.8 R:0.110]
[MSG:INFO: Z Pos Limit gpio.32]
[MSG:INFO: Motor1]
[MSG:INFO: tmc_2209 UART1 Addr:3 CS:I2SO.19 Step:I2SO.18 Dir:I2SO.17 Disable:I2SO.16 R:0.110]
[MSG:INFO: Z2 Pos Limit gpio.34]
[MSG:INFO: X Axis driver test passed]
[MSG:INFO: Y Axis driver test passed]
[MSG:INFO: Y2 Axis driver test passed]
[MSG:INFO: Z Axis driver test passed]
[MSG:INFO: Z2 Axis driver test passed]
[MSG:INFO: Kinematic system: Cartesian]
[MSG:INFO: STA SSID is not set]
[MSG:INFO: AP SSID FluidNC IP 192.168.0.1 mask 255.255.255.0 channel 1]
[MSG:INFO: AP started]
[MSG:INFO: WiFi on]
[MSG:INFO: Captive Portal Started]
[MSG:INFO: HTTP started on port 80]
[MSG:INFO: Telnet started on port 23]
[MSG:INFO: Flood coolant gpio.2]
[MSG:INFO: Mist coolant gpio.16]
[MSG:INFO: Probe gpio.36:low]
ok

Przemek · February 1, 2025, 3:26pm

On below photo LR stopped in the middle of its work, it cut some clouds and stopped.

Dreyfus · February 1, 2025, 4:15pm

The stepper drivers have a thermal cutoff, have you a way to check if they are getting too hot?

Przemek · February 1, 2025, 5:19pm

Yes, temperature was the first thing I checked, and stepper regulators are 27-32C, stepper (~17C), and esp32 - 36 - 38C, nothing special. My LR works in the garage, where it’s about 15C

Bartman · February 1, 2025, 5:46pm

More details please -

When it stops, does the router also stop turning?
Does the controller turn off (LEDs go dark)?
Does the controller turn back on again after starting?
Do the Z steppers lose power? (does the gantry drop down?)

Przemek · February 1, 2025, 10:45pm

Thanks, I will try answer.

No, a router normally turning, my router it is Makita RT0702,

No, all lights are green as during normal work, as in picture above.

No really sure, about what you asking. When I restart fluid or turn off/on jackpot I can send command but of course it lose previouse job.

No, behaviour is similar l like a pause, but not able to resume or send any command(I can send command by fluid, but no reaction from machine) . Only hard reset or turn off/on brings control back.

Bartman · February 1, 2025, 11:57pm

Thanks for the answers. They seem to eliminate the likelihood of an electrical issue. That leads to the possibility of a programming issue, where an error in the code is causing the controller to hang up.

You said that it stops randomly, but is it truly random? If you run the same program repeatedly, does it stop at different times, or does it stop at the same point in the code? (I suggest running the programs as “air cuts” to avoid repeat damaging of the stock)

Przemek · February 2, 2025, 9:08am

Is totally random, without moving material I run multiple times the same program, and it is stopped in different places. In that way I’'ve cut the struts plates, after few attempts finally it finished.

I wrote that it stopping after ~30 min but sometimes is 15 or 40min.

I use estlcam, with simple cut and with finish path, Z-2mm , 15mm/s material - lightweight 12mm plywood. Very slowly and material with minimal density.

I think this is electronic issue, but not sure what i can test /measure.

Przemek · February 2, 2025, 10:36am

I will try to cut in the air, with the spindle turned off, maybe the spindle affects the jackpot or something wrong with a charger, I don’t know … , maybe it lowers voltage.

jeyeager · February 2, 2025, 1:33pm

I have two thoughts:

While using AP mode is the general V1 recommendation (I think primarily because it’s easier to setup), the FluidNC devs highly recommend using STA mode for performance reasons to the point that they only support AP mode for initial setup.

Are you accessing the WebUI when it stops? Do you have anything else connected like a pendant?

It might be worth trying to run this with FluidTerm running connected to a computer via USB. This will show the serial output. The output there may provide details on what happens. If it outputs a backtrace during the failure, that can be translated to point at the specific code that failed. Or it could show something else.

To do that, you would power the machine first so it uses power from the board and not USB, then connect USB and run FluidTerm, and then run a job.

CesarH · February 2, 2025, 2:12pm

not related to Op issues but this is how i run my 3 boards and never had any issues ( each cnc runs with a dedicated touchscreen monitor/pi

went back from Sta mode because some issues: always had some sort of LAG issues, i hit pause/resume/start/stop and it took AGES to perform the action. each machine has its own wifi name/password so only one connected device. ( all boards running V3.7.9 -Thats old i know, but it works never had an issue, maybe need to take the time to try a new release into one and see if i can update all with the 2 new lr4)

Bartman · February 2, 2025, 6:05pm

What are you using for dust collection?

Is the hose grounded?

Static electricity has been known to cause issues for several users… (Several successful air cuts with the router not spinning may indicate this as a potential issue)

jeyeager · February 2, 2025, 6:08pm

Yea, I’m not sure this is the issue here. It’s a bit odd the issues you have with it, not sure if that’s a version thing or maybe weak/congestion wifi signal or something else.

I guess I discounted this possibility based on this comment but perhaps I shouldn’t have. It would explain this.

CesarH · February 2, 2025, 6:38pm

My sta mode issues were consistent back in the day with barts 6pack and a long time before we had the jackpot, never tried the sta mode after that maybe it is time, and maybe time to upgrade, maybe one of the new lowriders going to be a “conejillo de pruebas”

Przemek · February 2, 2025, 6:40pm

The vacuum cleaner was turned off, this was the first think which I had.

Today I made some tests, and know less than yesterday, according to suggestion I had plan to cut air without spindle.

First cut (on air) : it stopped on 11%
Second cut (on air)- finished - no issues - wow
Third cut (in material) - almost finished but on final cuts, it lost steps on X (too little rpm, I set to 2,5 ) - grrrrrrrr but not related
Fourth cut (in material) - finished without issue (spindle set for 5)

How to understand these results, completly don’t know. Two things were diffrent than yesterday:

Place of computer, today was on jackpot side, yesterday on spindle
Today morning during the first cut I opened the door in garage and temperture goes down to 7C, and during the last cut was 12C. Yesterday inside was around 15C.

Summarize, after two days, around 10 cuts I have my platform, nice result and know less than yesterday. Time to start weekend

Next time I will try to use FluidTerm

Przemek · February 2, 2025, 6:50pm

Initially Fluid was configured to use option STA>AP , but i changed to AP, I thought that this was the reason, unfortunately not.

I haven’t any other devices connected like FluidDial and etc.

WebUI is still working but looks it lost connection. Machine don’t react for any commands. Only restart helps.

Today when it stopped I send command $SS, → result below

Bartman · February 2, 2025, 7:18pm

So this almost sounds like the code is getting interrupted somehow.

I know next to nothing about the Jackpot board (I use the SKR Pro v1.2), but how are you sending the code during the cut? Are you using wi-fi, or are you using an SD card?

Przemek · February 2, 2025, 7:34pm

I upload from WebUI to SD card and then boot from SD. Not sure if there are other methods, I just follow the v1e docs.

CesarH · February 2, 2025, 7:37pm

You upload the gcode archive to the jackpot board sd card via wifi. But it runs from the sd card.

Temps inside the board box is what i would try to find out. Makes no sense it stops randomly like that. How solid is the psu connection?

Makes no sense you are gaving this issues with the version supposed to have revolve (in fact it did, no one is having this issue) long runs memory issues.

Przemek · February 2, 2025, 10:39pm

Blockquote
How solid is the psu connection?
rather solid, wires are screwed, the rest is a typical charge plug. Also I shaked wires to exclude connection issues, no change.

Probably only reasonable option is to look to inside of the jackpot during cut by fluidterm.

I never used FluidTherm. Does the Fluid expose trace directly to the console or I need to use some commands?If so, what commands? Could you advice how to get all information to be able analise issue. Thank you