How to Ignore Errors and Upload Marlin

Troubleshooting Tips

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Graphical LCD Artifacts

LCD Glitches After a new install of Marlin your graphical LCD shows glitches or is blank. This is caused by bad timing in the LCD information transmission.

Solution: Ascertain custom delays. Add the following lines to Configuration.h as your starting-bespeak and adjust values upwardly until the display works reliably. You should continue testing to observe the lowest values that produce a reliable display because the LCD update steals fourth dimension from the main loop.

                          #define ST7920_DELAY_1 DELAY_NS(200) // Subsequently CLK Low #define ST7920_DELAY_2 DELAY_NS(400) // Later DAT #ascertain ST7920_DELAY_3 DELAY_NS(200) // After CLK HIGH

Alternative Solutions

For AVR boards open ultralcd_st7920_u8glib_rrd_AVR.h and remove #pragma GCC optimize (iii) to reduce code optimization.
Add together 4.7k pullup resistors to the SPI lines if they are not unremarkably used for SPI.

Hanging LCD?

Attempt doubling BLOCK_BUFFER_SIZE to see if the trouble goes away.

No LCD / SD on ReARM?

As seen in this Chris'south Basement video, the RRD display doesn't always work on start install. It didn't fifty-fifty light upwards. A custom adapter is needed with the ReARM. Run into this issue, and this issue, and this page.

FTDI USB Bandwidth

At 115K baud use 167 latency, 192 USB block request. As i goes upwards the other goes down.

Long Beep on Boot

This is a hardware issue due to the connected beeper pin existence Loftier when the lath is first powered. Marlin turns off the BEEPER pin equally soon every bit it possibly tin. A new bootloader for your lath might gear up the issue in the time to come.

Random Halting

An under-powered PSU combined with heaters and high speed moves tin can atomic number 82 to a frozen board. No kill, no watchdog, heaters stuck on. Run into #17202. To exam for this:

To examination for this, enable the bed and extruder heaters and print at high speed to run across if a hard freeze occurs. Try disabling heaters and/or slower press to see if the problem goes away.
Read the input voltage from PSU with a meter during fast moves. If you see a drop too far below your expected voltage (e.m., 12V or 24V) this indicates a problem.

EEPROM Errors

After flashing a new version of Marlin, the existing EEPROM contents may no longer conform to the updated EEPROM layout. Equally a result, you lot may see an error similar one of these:

            Fault:EEPROM datasize error.

            EEPROM CRC mismatch - (stored) 4235 != 6244 (calculated)!

Troubleshooting Procedure

If using Octoprint, plow off the option to disconnect on "Error" messages before proceeding.
Do M502 and M500 and then reboot the machine. This procedure will initialize the EEPROM to your configured "factory" settings.
If you notwithstanding see checksum or data-size errors, add the following option to your Configuration.h, wink, and reboot.
```
                                  #define DEBUG_EEPROM_READWRITE                                                
```
This option makes Marlin cheque the EEPROM information during M501 (read) and M500 (write) and study mismatched fields. Please written report these errors to the Marlin project, because a mismatched field may indicate a issues in the lawmaking.
You lot can besides enable the EEPROM_AUTO_INIT option to automatically reset the EEPROM when the data structure changes or the data gets corrupted.

Sanity Check Errors

Marlin'south SanityCheck.h files exist to check the validity of settings and make sure obsolete settings go updated for the newest Marlin. Be sure to read and follow all directions provided by these checks.

Build Likewise Large

A Marlin build can range in size from under 60K to over 200K with a generous complement of features enabled. All features endeavour to use equally fiddling SRAM as possible, but some have a college SRAM cost. As a guide and starting-point, be sure to employ the example configuration included with Marlin that all-time matches your specific machine model.

Delta Height, Z Probe Kickoff, and G33

Since Marlin ane.1 "Delta Superlative" is divers equally the distance betwixt Z Dwelling Position and the Z-MIN trigger bespeak (so information technology remains constant). The Z Probe Offset is added to that distance in order to go to the elevation of the outset printed layer and as such is contained from Delta Top. (Printers without a probe have no Z Probe Offset. Instead, the Z-MIN trigger-point comes from the paper examination height, aka Z0.)

Trinamic Stepper Drivers

These tips are collected from diverse reports nosotros have received. Run across Trinamic troubleshooting for boosted guidance.

Some SilentStepSticks with variable three-5V logic voltage (VIO) might go damaged if only powered over USB.
SPI conflict with the SD card? Solutions vary.
E Stepper won't motion when using Linear Advance with TMC drivers?
- "I ended up using the drivers in legacy mode and setting them to SpreadCycle using the OTP (One Fourth dimension Developer). Unfortunately trying to set individual drivers to SpreadCycle via UART by enabling HybridThreshhold and setting the threshold to 0 for the respective axes did not work." Come across #11825.
Loud / grinding TMC2208? Increase the current to ~1500mA and lower the Hybrid Threshold.
Unreliable printing, shifting layers? Make sure the 'rsense' value is configured according to recommendations. See #9368.
TMC2208 uses SoftwareSerial, and this conflicts with Endstop Interrupts. Disable Endstop Interrupts to proceed.
Should I use SOFTWARE_DRIVER_ENABLE? Not unless required past the hardware. See #13326.

Babystep Double-click ignored

Increase the DOUBLECLICK_MAX_INTERVAL value

Simulated Endstop Triggering

Enable and set ENDSTOP_NOISE_THRESHOLD to filter the endstop signals.

BLTouch Pivot Drop / Blinking

Servo voltage / signals may exist unstable due to heater indicate lines existence too close to servo traces.
Solution: Disconnect the servo signal line after the impress starts.

Car Build Marlin

Meet Auto Build Troubleshooting Guide.

cooperforstized.blogspot.com

Source: https://marlinfw.org/docs/basics/troubleshooting.html