Panelolu on RAMPS and PrintrBoard issues

Panelolu on RAMPS

Update: The Panelolu2 has replaced the Panelolu. It is much quicker to install, has adapter boards to no messing with cables and uses less pins. The blog post with the information is here, it is available to buy in our webshop.

The original idea for the Panelolu was based on the PanelMax which works with RAMPS. What I had not got around to doing was determining the changes needed to the pin mapping to cable for the Panelolu to work on RAMPS. Thankfully Ian Stratford has done the hard work and worked it all out.

Update: Ian has also made the Panelolu page on the reprap wiki - thanks!

The tables below refer to the RAMPS pin outs from the reprap wiki - the picture is below

The tables below cover the differences between the RAMPS setup and the original instructions: Panelolu on Sanguinololu.

Ribbon Cable number	Function	Pin Sanguinololu	Pin RAMPS
1	GND	GND	NA
2	12V	12V	NA
3	LCD 1 (VSS - Ground) LCD 5 (RW - Read/Write) LCD 16 (K - Backlight Anode-) Breadboard GND for encoder, switch, contrast, reset.	GND	GND (AUX-4)
4	LCD 2 (VDD +3.3 to +5v) 5V on breadboard, for brightness	5V	5V (AUX-4)
5	LCD 14 (DB7 - data bit)	A4	D29
6	LCD 4 (RS - register select)	PWM D12	D16
7	LCD 13 (DB6 - data bit)	A3	D27
8	Encoder1	TX1 D11	D35
9	LCD 12 (DB5 - data bit)	A2	D25
10	Encoder2	RX1 D10	D37
11	LCD 11 (DB4 - data bit)	A1	D23
12	LCD 6 (E - clock)	SDA D17	D17
13	SD (CS pin)	A0	D53
14	(via SDSL plug, NC) Encoder click	SCL D16	D31
15	(via SDSL plug, NC)
16	(via SDSL plug, NC)
17	SD Ground	GND	GND
18	(via SDSL plug, NC) Reset	RST	No RST pin?
19	SD (DI pin)	MOSI	MOSI D51
20	SD (SCK pin)	SCK	SCK D52
21	SD 5V	5V	5V
22	SD (DO pin)	MISO	MISO D50
23	NA	NA
24	NA	NA
Other	LCD 3 (VO – contrast adjuster) to C on breadboard
Other	LCD 15 (A – Backlight Anode+) to B on breadboard (brightness)

RAMPS AUX-4

Ribbon Cable number	Function	Pin Sanguinololu	Pin RAMPS
6	LCD 4 RS (register select)	PWM D12	D16
12	LCD 6 E (clock)	SDA D17	D17
11	LCD 11 DB4	A1	D23
9	LCD 12 DB5	A2	D25
7	LCD 13 DB6	A3	D27
5	LCD 14 DB7	A4	D29
14	SD, encoder click	SCL D16	D31
	(Piezo Buzzer +)		D33
8	Encoder1	TX1 D11	D35
10	Encoder2	RX1 D10	D37
3	Ground	GND	GND
4	5V	5V	5V

RAMPS AUX-3 / SPI

Ribbon Cable number	Function	Pin Sanguinololu	Pin RAMPS
17	SD Ground	GND	GND
	NC		NC
20	SD (SCK pin)	SCK	SCK D52
13	SD (CS pin)	A0	D53
22	SD (DO pin)	MISO	MISO D50
19	SD (DI pin)	MOSI	MOSI D51
21	SD 5V	5V	5V
	NC		D49

To quote Ian

"I have managed to connect up the Panelolu kit to my RAMPS board with great success! Everything works except the reset button, as there is no reset pin on RAMPS. I added a piezo electric buzzer as well (from an old PC). Cabling is pretty straightforward, I just needed to trace the connection to the right pin. I built the Panelolu kit as per the Sanguinololu instructions, then used a couple of different sources to work out the correct pins on the RAMPS board. Then all I had to do was uncomment the #define ULTIPANEL line in Marlin. I did check the pins.h file, but it's already all in there for RAMPS. Worked first time!!"

Its now on my todo list to make up a cable to connect to RAMPS, something I intend to use on a dual extruder M90.

Printrboard issues

One of our customers, Bernardo, highlighted an issue with the Printrboard design: the Y-endstop is on the SS pin. Bernardo found the solution on Colin Bradburne's blog which I wont repeat here but if you are intending on using an SD card with Printrboard it is well worth reading his blog.