<![CDATA[SoliForum - 3D Printing Community — SD3, Sang board, ATX PSU, Mk2 heatbead, LCD/SD card upgrade. HELP!!!!]]> 2015-03-04T22:39:19Z PunBB https://www.soliforum.com/topic/10255/sd3-sang-board-atx-psu-mk2-heatbead-lcdsd-card-upgrade-help/ <![CDATA[Re: SD3, Sang board, ATX PSU, Mk2 heatbead, LCD/SD card upgrade. HELP!!!!]]> What I've ended up doing is put the old AT MEGA chip in, and disconnected the SD card and screen. The Mk2a heatbed works off the solid state relay ok, though didn't heat up quite as quick as the new firmware. It's almost finished printing (after 24hrs smile smile smile )
I've done a bit of searching and it could be the bootloader on the chip,
Looks like it could be this;
Fuse Settings

"The fuses for the atmel chip must be changed from the default factory settings to disable JTAG.

Symptoms of incorrect fuse settings:

    X axis only moves in one direction.
    Endstops do not work.

644P Fuse Settings

The settings come from the bootloaders boards.txt file.

Example using avrdude and usbtiny.

avrdude -B 8 -patmega644P -c usbtiny -U lfuse:w:0xFF:m -U hfuse:w:0xDC:m -U efuse:w:0xFD:m

1284P Fuse Settings

Use Arduino as ISP to upload ATmegaBOOT_168_atmega1284p.hex bootloader found on code.google.com

avrdude -p atmega1284p -c stk500v1 -b 19200 -V -e -U lfuse:w:0xD6:m -U hfuse:w:0xDA:m -U efuse:w:0xFD:m -U flash:w:ATmegaBOOT_168_atmega1284p.hex:i "

So something to look into after the wedding smile I highly recomend an ATX PSU though. $30AUD for a 550W one smile I put a strip of RED leds below the bed frame so I can see when the heatbed is heating. . . .. just in case it goes crazy and stays on for an extended period of time.

]]> https://www.soliforum.com/user/1590/ 2015-03-04T22:39:19Z https://www.soliforum.com/post/88299/#p88299 <![CDATA[Re: SD3, Sang board, ATX PSU, Mk2 heatbead, LCD/SD card upgrade. HELP!!!!]]> Any chance to revert back to where it was before you did the upgrade? Maybe reflash the firmware .

]]> https://www.soliforum.com/user/574/ 2015-03-04T20:51:21Z https://www.soliforum.com/post/88276/#p88276 <![CDATA[SD3, Sang board, ATX PSU, Mk2 heatbead, LCD/SD card upgrade. HELP!!!!]]> Ok,

So I'm meant to be printing my wedding cake topper for my wedding this weekend.  .. . . and I've ran into a few issues with my 3D scan, then parts arriving etc. Hence last minute panick sad.
I followed this for the LCD screen/firmware update.
http://www.soliwiki.com/Panelolu
I'm not getting Solidoodle coming up on the screen after I flash the firmware, could be related.
What works?;
Z axis works fine.
Y axis works fine.
Extruder heats and extrudes.
Bed heats and switches on and off properly.

Other issues;
X axis travels right, regardless of whether I click the manual left or right buttons in RH.
Endstops don't seem to work now with the new chip.

Any ideas? Please help save my wedding wink

Daniel

]]> https://www.soliforum.com/user/1590/ 2015-03-04T01:03:44Z https://www.soliforum.com/post/88172/#p88172