Davinci Jr Repetier Port (Page 3 of 9)

Any progress? I'm really curious about progress.
May I help you somehow?

If there is anything I can do to help, please feel free to let me know. I've got two of these pieces of crap laying around now, so one can be sacrificed if need be, for the greater good.

ive just given up on this, i bought a ramps 1.4 kit with the screen and all, but i know that the heater core and thermistor of the extruder are both on plugs, so i can jerry-rig those to connect to the ramps 1.4 system. if the fix comes out, i may switch back for sake of cleanliness.

ive also noticed that the extruder heater coil (as i called it core earlier) goes to pin 8 on this chip/gate within the extruder module itself, I have no clue what that means, but the trace goes under the edge of the connector and i have not seen it go to the connector itself.

now i have another question:
are they using ASBESTOS for the wire insulation!? that's kinda dangerous!
(note: im jumping to conclusions here, i saw something like this on the 260 motor on my ford fairlane 500 with its automatic choke system, they used asbestos in the insulation there because laws and regulations were different back in 1964, i do not know exactly if or if not this is the case, but it is highly probable)

Has anyone else been able to confirm pin 8 for the heater on the Jr? Going to be looking into it myself this weekend sometime.

that chip now mystifies me, i have no clue what its purpose is

I guess the chip stores the ID and some further information about the extruder like nozzle diameter and type (since there is also a laser engrave module for the JR) and passes these information to the printer.

You posted twice.

On most 3D printer logic the ground is often switched instead of power. So it is possible that power is shared and then the ground is switched.

I am am electronic tech of 20 years. If you supply a good image of the chip and the markings on it, I can find out what it is and what each pin does. My guess is that it is a EEPROM of the two wire variety. Meaning it really only needs 3 pins to operate. Similar to the chips found on the filament rolls for the Cube 3. This chip as has already been mentioned probably stores data about the hotend so the printer knows what type of hotend is currently installed.

Xyz uses the same contoller in all their printers. Some of the boards are just more populated depending on their function.

Their new 3 in 1 is a printer, router, and engraver. So it needs an easy way to identify what type of head is installed. Most likely it uses this same head for the printet finction. Chances are the chip may not even serve a purpose in your model. It is just there for models that need it.

Based on that last image,  what are you calling a chip exactly. I thought you meant the small one marked U2. Your image and markings seem to refer to the ribbon cable connector along the edge of the board. If that is the case it is nothing but a friction fit connector for the ribbon cable. If you wanted to know the purpose of each pin you would need to connect the cable and trace back to the main board.

I should have clarified - the markings I provided are simply to the connection for the ribbon cable. The chip on the board is an ATMLH532, of which I'm still looking for information and a data sheet for.

Markings of that chip are as follows, the actual chip may vary from each:

ATMLH532
02DM          Y
A2ANGA

EDIT:

Assuming that the ground on the right of the cable connector is pin 1, with the only evidence I have being the ground on each header also happens to be Pin 1, I've made a simple cheat sheet to help in 2 things: First is to help confirm the pins I mapped, and second is to hopefully add to the pins that have already been discovered.

I grouped each pin to the white mark at every 5th pin, if that helps at all.

Header                 Header Pin               Ribbon
------------------------------------------------------------------------
Fan (GRND)           1                            16
Fan                       2                            45
------------------------------------------------------------------------
NTC (GRND)           1                            30
NTC                       2                            22
------------------------------------------------------------------------
J5 (GRND)                   1                                34
J5                       2                            29
------------------------------------------------------------------------
Heater(GRND)           1                            50
Heater               2                            40
------------------------------------------------------------------------

EDIT #2: The ATMLH532 seems to be a power regulator. 12v 5a, which fits with the overall power requirements of the printer. Could be wrong, though.

Great Find Carl! Had a hell of a time trying to dig anything up and all of the information I could find lead me to believe it was a regulator of some sort. I don't think any one stated it was a problem though.

As far as that chip goes, it is nice to have finally found a pin out, but one thing that gets me is why the NTC and part of the Fan runs through it but not anything else. Perhaps I should start working on mapping those pins as well...

EDIT: I think the issue was the overall board still needed mapping.

for Megatron and Carl

what i think happened with this chip, they might have used it on a different extruder, such as the AiO or other ones, especially since it has an extra header. That could be why they used that chip on that board instead of going with something that could have been cheaper. or another likely scenario (arduino did this with their SMD version) they ran out of a supply or had a surplus of a supply and decided to use that chip instead.

but i never thought it was an issue with my printer, unless that is where the extra NFC data is stored i was just curious as to its purpose.

for Megatron and Carl

im sorry if i didnt get to this earlier: the problem with supplying a better image is that what i have currently takes a lengthy process and there are probably better examples online that can be obtained faster.

plus, i put it back in the fully-assembled extruder module so that i could hook it up to a RAMPS 1.4 board, because i wanted to, and so that i have something until (if it even happens) a port comes out for this board and its components.