SD Press - Under the Kimono (Page 6 of 12)

Have you reflashed your AT90USB chip? It has not been confirmed that the released firmware code is exactly what is loaded on the Press motherboard. 

I did a review of the source code for fan pin 16.  There is nothing in the firmware that would prevent command M106/M107 from working.  You could also try the pin specific command, but I doubt the results would be different.
M42 S0 P16
M42 S255 P16

After the software, the next thing to check is the circuit trace.  We have not seen the Press's schematic yet.  There may be an undocumented enable needed to be set first to enable those outputs.  Pin 16 in teensy arduino is actually pin 41 on the processor.  See if pin 41 actually runs to the transistors / resistors nearby the FAN or PWM connectors.  Next time I have my motherboard exposed, I'll poke around.

Code stuff
pins.h

#define FAN_PIN            16  // Fan

Marlin_main.cpp

case 106: //M106 Fan On
        if (code_seen('S')){
           fanSpeed=constrain(code_value(),0,255);
        }
        else {
          fanSpeed=255;
        }
        SERIAL_ECHOLN(fanSpeed);

Call Tree

Marlin_main.cpp > loop()
    Marlin_main.cpp > manage_inactivity()
        planner.cpp > check_axes_activity()
            tail_fan_speed = fanSpeed;
            analogWrite(FAN_PIN,tail_fan_speed);

Crap, ... ok, next step then.  If you don't beat me to it, I will take a look next week at the wiring.

So the PWM GND is connected to (Q7) Then Q7 is connected to GND (PIN 53 on the AT90USB1286) Q7 POS is connected to PIN 10 (SS/PCINT0 - PB0)  on the AT90

I goofed (I thought I rotated the image so pin 1 as in the right orientation as the mcu on the SD board. Nope.). I rechecked. POS side of the NPN goes to pin 41 (C6). The docs I have said it was A14 but the link you send said A16.

So I guess it has to be 16. 14 is mapped for Y_STOP_PIN. 16 is what it was set too. And M106/M105 does nothing to it.

Yeah I was looking at FAN_SOFT_PWM & FAST_PWM_FAN. When FAST is enabled, It will not complie. When SOFT_PWM is enabled no changes the PWM pin is at full blast.

I decide to connect it up to my scope and got this.

That doesn't look PWM'y. Its a flat (noisey) 12V feed.

Did you happen to figure out how the extra FAN connector is wired?

It may seem a bit extreme, but I would try commenting out these lines in Marlin_main.cpp:

#if NUM_SERVOS > 0
#include "Servo.h"
#endif

or, just remove the "include "Servo.h"

Even though NUM_SERVOS is Undefined/0, The Arduino IDE does not handle preprocessor directives well... and the Servo library disables AnalogWrite for PWM on Pin16 on the AT90USB1286.

The Servo Library isn't needed, so "forcing" it to not be included shouldn't hurt.

I'll try this myself at some point... but I really haven't had much time to actually work on the printer.

I could be completely wrong here, but something seems to be making the Analogwrite command be ignored....

That didn't work either. Don't know what the deal is. I've tried everything I can think of. Rechecked the board again to make sure that it's in fact C6 aka PIN 16. (Or in some case PIN 22).

Pretty much stumped.

Haven't touch Soliprint until today. Man it's buggy. For me it shows the temp for the hotend is -100C.

My Press has been only used with OctoPrint. Haven't had any issues there.

When I swapped out the glass sheet for PEI. I manually leveled the media with a digital angle gauge and used 1mm precision washers under the four screws. Then ran G29 and off to the races.

I am assuming M105 response is different in the SD Provided Firmware files then what was shipped on the Press. And SoliPrint is expecting a specific response.

Thanks.  I think I may have found the command I need... I'm going to try it shortly.  There is an M851 command in the source code which is "M851 Set leveling probe Z offset".  I suspect that is the one I need to use.  I'll be trying it later today.

the -100 hotend temp is what I'm seeing also... that wasn't an issue with the original solidoodle firmware...  makes it seem as if the source code they provided is not quite what was loaded on the shipping units, unless Soliprint is checking for a build date or something.

I did dump my Flash before updating... it was identical to the .hex you pulled from yours.

I still am having no luck with the PWM pin on the controller. I asked a SD employee if they could share some insight on how to get that configured. They also shared that the FW for the ATTiny & the Press gerber/eagle files will most likely not be released.

'the firmware on the attiny is proprietary and was written completely in house'

Don't understand the secrecy for something that blinks and lifts a FET. As we know, There are triggers to make the Press home on a single push. And you can make the LED blink via a M command. I am still going to see what I can do with the hex dump I got from the attiny. Any progress there will be reported.

As a side note. Although this is a couple days old- I've decided to do one more mod to the Press. And it was well worth it.

That's a MK2B Dual Power PCB Heated bed (With a sheet of PEI above that). As you can see in the graph above. It gets to full temps as fast as the hotend- (<6 min'ish (The hotend is a E3D v6).

Where I got it > http://www.amazon.com/gp/product/B00M9TQ18A/

Is it worth the upgrade? Hells-to-the yes.

Currently out of town. I'll make a fresh post with all the mods I have done and the troubles I had along the way.

*--Edit --*

Oh yeah I've added a spool holder to the rear of the printer. Nothing fancy. But effective.