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SD card module pins
hi I have micro SD card module on my RAMPS1.4 and this thing doesn't work since I got it first time. I decided to fix it, and tryin to test it on another arduino mega But I cannot be sure about pins....
View ArticleRe: Controller LCD contrast issue
No, I did not have to cut any traces on the board. I checked the voltage on the trimpot and saw that it would not go above 1V, regardless of the setting of the trimpot. So I tried with various...
View ArticleRe: Controller LCD contrast issue
I soldered in a 270 ohm resister as you did, but it made no difference. I am attaching a photo of my PCB as suggested by DC42-- it appears to be a similar board to yours. It appears that your board...
View ArticleRe: Controller LCD contrast issue
Did you measure the variation of the voltage of the trimpot (3rd pin hole) when turning it from one end to the other? Any change when in the voltage with the resistor? Is the 2nd pin hole really at...
View ArticleRe: Controller LCD contrast issue
After closer inspection, I realized that pins one and two were on the same trace. I confirmed this by removing power from the board and testing the resistance between the pins... there was no...
View ArticleRe: Basic RUMBA start up question
I have more clues on the puzzle... Like I reported above, the green LED comes on for either the HE0 or FAN0 port when I enable them via Repetier. But unlike the heated bed LED, which is a solid green...
View ArticleRe: Controller LCD contrast issue
It was the back of the 12864 display that I wanted to see a photo of. Is that where the trimpot is, or were you referring to a trimpot on the controller board?
View ArticleIs this a known board?
I have a Myriwell printer and am wondering is the electronics they use is really their own design or if it is a known design by someone else. Since it has an unused connector "case temp" (at the...
View ArticleRe: Basic RUMBA start up question
Could it be that the PID_MAX setting in your Marlin configuration is wrong?
View ArticleTrouble connecting with USB and touching printer with metal object
Hello reprappers, I've build a i3 a few weeks ago and I'm happy printing. But there's something odd and I can't figure out why it's happening. First wierd thing: When I'm trying to connect the printer...
View ArticleRe: Is this a known board?
Looks like their own board. Not to dissimilar to the all in one reprap boards that are out their. Apart from the buzzer which most board don't have. Connectors look better than whats on most boards.
View ArticleRe: Trouble connecting with USB and touching printer with metal object
... the GND-potential of your power supply and the PC is off some Volts -- so when connecting with the GND-pin of your USB-cable, a high current peak across the USB-shield will kill the...
View ArticleRe: Basic RUMBA start up question
Anything's possible I suppose. Not sure why that would affect the fan though. I have included a handy-dandy graphic to show what's what. [attachment 46075 RUMBA_diagram2.png]
View ArticleRe: Basic RUMBA start up question
I tried PID_MAX - no real change. By setting it to half (127 instead of max 255), I get the HE0 LED to flash with the duty cycle. Still no voltage. Just to show what I am seeing on Repetier......
View ArticleRe: Controller LCD contrast issue
The trimpot is on the display controller board. The pins for that trimpot can be seen in the bottom right corner of the photo I posted previously. The display board is tightly daughtered and soldered...
View ArticleRe: Trouble connecting with USB and touching printer with metal object
Make sure you run the PC and the printer power supply from the same mains socket, via a distribution block. Don't run anything else from that distribution block. Putting a ferrite bead on the USB...
View ArticleRe: Basic RUMBA start up question
Hi all - I have been having a discussion with Geeetech about this board, and they are asserting that the RUMBA should only be powered up by a 12V supply. This seems counter to the spec, which states...
View ArticleArduino UI issue
ok so im lookin at the marlin firmware and have a bunch of tabs at the top of the sceen, but i cant get to the other tabs in the firmware... and yes iv used the drop down menu to get to some of the...
View ArticleSOLVED! Trouble connecting with USB and touching printer with metal object
I measured the shield (gnd) of the USB cable and the body of the printer. There was 4.8V?! Which means the power of the USB goes to the printer and then back trough the shield (gnd) of the USB....
View ArticleRamps running multiple steppers - how??
Working on a larger scale printer, Using RAMPS 1.4, and since the z axis already can handle 2 motors, I figured why couldnt the x & y? So I built a simple rail system using 2 x motors driving...
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