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#1 2016-07-19 00:16:54

Ontron258
Member
Registered: 2016-07-18
Posts: 3

Can't get Pi and Ramps 1.4 to communicate

Hello, and thanks in advance.

Just started building my nanoDLP top down printer and got all my hardware in. I've got a Pi 2 B, nock-off Arduino and Ramps 1.4 (from China).
I have the pi set up and can visit its webpage so I don't think that's a problem.
The arduino, ramps, stepper driver, and motor all work and I've tested them using this little program:
http://reprap.org/mediawiki/images/3/34 … stCode.pde

After setting the arduino up with Marlin (found here: https://github.com/MarlinFirmware/Marlin) and plugging it into the Pi via USB I cannot move the motor manually using the buttons found on the Z-Axis calibration page.
From what I can gather I've done everything correctly.

Any obvious things I'm missing? It seemed too easy for it to work properly first go-around.

Thanks,
Ontron258

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#2 2016-07-19 01:24:05

Shahin
Administrator
Registered: 2016-02-17
Posts: 3,546

Re: Can't get Pi and Ramps 1.4 to communicate

Have you entered correct RAMPS board path on the setup page?
Also you need to disable gpio for the movements.

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#3 2016-07-29 23:22:43

orlrogc
Member
Registered: 2016-07-28
Posts: 3

Re: Can't get Pi and Ramps 1.4 to communicate

Ontron, did you find a solution? I am having the same problem.

*I have verified that my RAMPS is working when I send gcode with another printer host.
*I can successfully connect to my RPi (I tried both a 2 and 3).
*The RAMPS board path is correctly set and I disabled GPIO.

I can't see what I'm missing. Any advice? I'm sure it's something obvious. Haha.

Thanks.

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#4 2016-07-29 23:44:44

Ontron258
Member
Registered: 2016-07-18
Posts: 3

Re: Can't get Pi and Ramps 1.4 to communicate

I did actually find a solution. I had the set the usb serial port on the Pi to the correct one. Apparently you can use putty to ssh to the Pi to find the correct port, but I couldn't get that to work. I tryed the "common" options in the drop-down menu and found one that just started working.
Check the log on the "home page" to see if the ramps board connects.

Hope this helps.

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#5 2016-07-30 00:26:49

orlrogc
Member
Registered: 2016-07-28
Posts: 3

Re: Can't get Pi and Ramps 1.4 to communicate

Thanks for your reply. My problem was I didn't notice I had accidentally left an extra space in front of my board path. Whoops. Your suggestion of checking the log helped me zero in on my silly mistake.

Thanks again.

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