[SDRAMPS] Can't transfer and read files Hey guys, here is my problem. Would appreciate any form of help. The sdramps that I ordered recently arrived and I'm having difficulty transferring and reading files to my micro-sd card. 1) Plug in SD card 2) Launch Repetier-host 3) Send M21 to printer, received ok as echo. 4) Open the SD tab and choose to transfer gcode file to SD. 5) Transfer rate is slow but process can be completed. 6) Send M20 to open the list of files but it is empty. I tried using a 64mb sandisk t-flash card and a 4gb sandisk micro-sd card but still doesn't work. I have formatted both cards with a windows PC to FAT format. https://reprap.org/forum/read.php?1,309722,309722#msg-309722 Wed, 14 Oct 2026 05:56:10 -0400 Phorum 5.2.23 https://reprap.org/forum/read.php?1,309722,411934#msg-411934 Re: [SDRAMPS] Can't transfer and read files https://reprap.org/forum/read.php?1,309722,411934#msg-411934
I am using the cables supplied in the lcd kit they are around 20cm or so... As for the SD card I am using a 4Gb, not Kingston (EMTEC I guess), SDHC class 4 card]]> Neo_999 General Thu, 25 Sep 2014 16:17:31 -0400 https://reprap.org/forum/read.php?1,309722,410693#msg-410693 Re: [SDRAMPS] Can't transfer and read files https://reprap.org/forum/read.php?1,309722,410693#msg-410693 * or 6 (F_CPU/128).


so in this case it may actually be a noise issue with cross talk. try to use shorter wires, and a common gnd. possibly shroud the entire cable with aluminum that is gnd?

many modern designs incorporate noise reduction by changing every other or third wire data at a time, then latching the transfer. i don't know if marlin uses this method or not. i would recommend using ic2 mode lcd's for longer cable. slowing sd transfer however is a welcome solution, another issue could be the sd card itself, is it compatible with high speed transmission? SDHC, SDXC, SDHC UHS]]> jamesdanielv General Tue, 23 Sep 2014 00:20:25 -0400 https://reprap.org/forum/read.php?1,309722,410653#msg-410653 Re: [SDRAMPS] Can't transfer and read files https://reprap.org/forum/read.php?1,309722,410653#msg-410653
I've recently built my Prusa i3 with a RAMPS 1.4 board from SainSmart, and bought a RepRap Discount FullGraphic LCD with SDCard reader.
As many of you, after spending countless hours of googling and searching in forums for solutions to get my machine to read the files on the SD card I think I have finally found one solution:

In Marlin firmware, go to SDFatConfig.h and in the 74th line:

#define SPI_SD_INIT_RATE 5

Change 5 for 6 like so:

#define SPI_SD_INIT_RATE 6

After doing that my printer read .gcode files within folders with names longer than 8 characters from my 4Gb SD Card (Yes I have read in several other posts that it wont work but it did...)

I am no coder whatsoever, I have found this by trial and error in the past few days

I am sure that this wont work for everybody, but I will be happy if this can help someone.]]> Neo_999 General Mon, 22 Sep 2014 18:55:12 -0400 https://reprap.org/forum/read.php?1,309722,366249#msg-366249 Re: [SDRAMPS] Can't transfer and read files https://reprap.org/forum/read.php?1,309722,366249#msg-366249
... but unfortunedly it is not the solution ...


;-((]]> netsnake General Fri, 06 Jun 2014 17:53:29 -0400 https://reprap.org/forum/read.php?1,309722,314511#msg-314511 Re: [SDRAMPS] Can't transfer and read files https://reprap.org/forum/read.php?1,309722,314511#msg-314511
Unix is case sensitive, and so is C, so upper and lowercase filenames are distinct.

When you combine all this with trying to support Windows filesystems on Unix or elsewhere, it all becomes a bit of a mess.

In Windows you can see the 8.3 names by using "dir /x" in a command prompt, I don't think there is an equivalent method in Unix.

The safest way is probably to use 8.3, uppercase only, but other combinations may work depending on how you mounted your filesystem etc.]]> bobc General Sat, 22 Feb 2014 11:45:59 -0500 https://reprap.org/forum/read.php?1,309722,314453#msg-314453 Re: [SDRAMPS] Can't transfer and read files https://reprap.org/forum/read.php?1,309722,314453#msg-314453
Or else there would be an error "No firmware response detected for sd action." and the print would start immediately. Posting this just in case anybody out there facing the same problem.]]> chngyian General Sat, 22 Feb 2014 09:23:51 -0500 https://reprap.org/forum/read.php?1,309722,310995#msg-310995 Re: [SDRAMPS] Can't transfer and read files https://reprap.org/forum/read.php?1,309722,310995#msg-310995
I wrote a blog post about this last weekend, but I found that my particular card only worked when I formatted it a particular way in os x:
coherent-reprap.blogspot.com

Other people on these forums recommended the official sd card formatting software for windows:
[www.sdcard.org]

My method of transferring is just to slice the stl and copy the gcode manually via windows explorer to the SD card and then plug it in. Cura also provides an option to copy it over once you slice it. Good luck and let us know if it works, I haven't found very much information online about this sort of thing so documenting would be great for others who have issues.]]> Coherent General Fri, 14 Feb 2014 14:08:17 -0500 https://reprap.org/forum/read.php?1,309722,310703#msg-310703 Re: [SDRAMPS] Can't transfer and read files https://reprap.org/forum/read.php?1,309722,310703#msg-310703 jamesdanielv General Thu, 13 Feb 2014 22:37:35 -0500 https://reprap.org/forum/read.php?1,309722,310465#msg-310465 Re: [SDRAMPS] Can't transfer and read files https://reprap.org/forum/read.php?1,309722,310465#msg-310465 chngyian General Thu, 13 Feb 2014 11:30:54 -0500 https://reprap.org/forum/read.php?1,309722,310248#msg-310248 Re: [SDRAMPS] Can't transfer and read files https://reprap.org/forum/read.php?1,309722,310248#msg-310248
I would think you could format a 2gb card to FAT 16, and see if it shows up. just turning the ramps board off, either by switch or unplugging it will cause it to reinitialize card upon start up once it is powered back up.]]> jamesdanielv General Wed, 12 Feb 2014 21:26:02 -0500 https://reprap.org/forum/read.php?1,309722,309891#msg-309891 Re: [SDRAMPS] Can't transfer and read files https://reprap.org/forum/read.php?1,309722,309891#msg-309891 jbernardis General Wed, 12 Feb 2014 08:42:21 -0500 https://reprap.org/forum/read.php?1,309722,309870#msg-309870 Re: [SDRAMPS] Can't transfer and read files https://reprap.org/forum/read.php?1,309722,309870#msg-309870 DeuxVis General Wed, 12 Feb 2014 07:33:11 -0500 https://reprap.org/forum/read.php?1,309722,309819#msg-309819 Re: [SDRAMPS] Can't transfer and read files https://reprap.org/forum/read.php?1,309722,309819#msg-309819
Quote
A2
Isn't there a 2 gig limit for RAMPS to work correctly?

I read that somewhere too, but my 64mb sandisk t-flash is acting the same way. I'll try to lay my hands on a 2gb micro-sd ASAP. Just want to be sure that I didn't make any mistakes in the setting up and procedures.]]> chngyian General Wed, 12 Feb 2014 05:38:22 -0500 https://reprap.org/forum/read.php?1,309722,309764#msg-309764 Re: [SDRAMPS] Can't transfer and read files https://reprap.org/forum/read.php?1,309722,309764#msg-309764 A2 General Wed, 12 Feb 2014 02:30:01 -0500 https://reprap.org/forum/read.php?1,309722,309736#msg-309736 Re: [SDRAMPS] Can't transfer and read files https://reprap.org/forum/read.php?1,309722,309736#msg-309736
Quote
jamesdanielv
have you mounted the files, or completely turned off printer and reset, so it can read the card at start up and initialize?

Hey James,

Thanks for the reply. What I did was send M21 to mount the card, is that what you are referring to? It would be good if you can describe the steps as I am unable to find any tutorial on sdramps online.]]> chngyian General Tue, 11 Feb 2014 23:51:59 -0500 https://reprap.org/forum/read.php?1,309722,309727#msg-309727 Re: [SDRAMPS] Can't transfer and read files https://reprap.org/forum/read.php?1,309722,309727#msg-309727 jamesdanielv General Tue, 11 Feb 2014 22:46:02 -0500 https://reprap.org/forum/read.php?1,309722,309722#msg-309722 [SDRAMPS] Can't transfer and read files https://reprap.org/forum/read.php?1,309722,309722#msg-309722
The sdramps that I ordered recently arrived and I'm having difficulty transferring and reading files to my micro-sd card.

1) Plug in SD card
2) Launch Repetier-host
3) Send M21 to printer, received ok as echo.
4) Open the SD tab and choose to transfer gcode file to SD.
5) Transfer rate is slow but process can be completed.
6) Send M20 to open the list of files but it is empty.

I tried using a 64mb sandisk t-flash card and a 4gb sandisk micro-sd card but still doesn't work. I have formatted both cards with a windows PC to FAT format.]]> chngyian General Tue, 11 Feb 2014 22:09:21 -0500