SD card mounting issue

nifty · May 15, 2026, 1:22am

I am trying to mount the SC card in the SLB controller and it refuses to work. I have run out of ideas and hope someone will have a suggestion/s I can try. So far I have:-

the only card available locally is a 32g sandisk. It has been formatted FAT32 and would not work. I deleted the partition and formatted a 16g partition and that also did not work. I read that there can be an issue with a 32g SanDisk card so i ordered a 16g Patriot card online. Reformatted it as FAT32. I put two .macro files on the card.

I have flashed the firmware with SLB_5.0.5b_NGC.hex successfully. I hard booted the controller and reset to default settings and again hard rebooted.

If I open tools and the SD Manager the card shows as MOUNTED. No files are listed. I try to load a file and follow the prompts but nothing really seems to happen. If I click REFRESH the ERROR 60 shows in the console and the SLB disconnects instantly. The only way to reconnect is to hard reboot the controller. At this point I have no idea what to try next. Any help would be most appreciated.

Spamming_Eddie · May 15, 2026, 6:33am

Hi Neville,

There is a known error with the SD card. I only remembered a post late co Chris made about it so without furter adue I am linking that post now.

Hope at least this clarifies things.

nifty · May 15, 2026, 10:04am

Thanks Eddie, I have read that post. Not to sure what is meant regarding versions. As far as i can find out there is only one firmware version that supports SD, which is the one I downloaded off the Sienci site. Turned out I had the card mentioned as causing problems so I bought a different brand but it didn’t change the outcome.

I am probably wrong, but i think SLB firmware hasn’t been updated since 2023 so I wonder if the updates written about are in fact for the SLB-EXT.

KGN · May 15, 2026, 1:16pm

If you’re running 5.0.5b you will not see .macro files with the default $F listing since that extension was added to the whitelist later. You should see .gcode files.

If you type $F+ you’ll see it listed.

sienciHAL (5.0.5B) filetypes: Plugin_SD_card/sdcard.c at d00dc7beb5562539ff1dac2171492377cc9fb303 · grblHAL/Plugin_SD_card · GitHub

grblHAL core filetypes:

github.com/grblHAL/Plugin_SD_card

fs_stream.c

e0bd4cd20


      
          #if FS_ENABLE & FS_SDCARD
          #include "fs_fatfs.h"
          #endif
          
          #if FS_ENABLE & FS_YMODEM
          extern void ymodem_init (void);
          #endif
          
          #define MAX_PATHLEN 128
          
          static char const *const filetypes[] = {
              "nc",
              "ncc",
              "ngc",
              "cnc",
              "gcode",
              "txt",
              "text",
              "tap",
              "macro",
              ""

A newer version of the SLB firmware will be coming soon ish at Engineering’s discretion.

nifty · May 16, 2026, 12:14am

As far as I know I have flashed with the correct firmware. The file I downloaded was SLB_5.0.5b_NGC.hex. At the end of the flashing process it shows Successful. $i shows BOARD:superlongboard-B.05.5b, but I can’t find any reference to know if that is correct.

I will try a simple .gcode and see if that is showing as you suggest.

I have looked at the github but I have no idea what I am supposed to do with those files?

Thanks for the help.

nifty · May 18, 2026, 4:40am

It appears the issue I am having relates to the Tools>SD card manager (v1.6.1) Whenever I do anything in the tool it throws the 60 error and shuts down the SLB. I find if I avoid the tool and only use the console it then reads the card and shows all the contained macros. Not sure about stability yet so I need to test further but I shall mark it as solved. Thanks for the guidance so far, it helped enormously.