problems: heated bed and extruder motor not working

Crux

problems: heated bed and extruder motor not working
June 09, 2013 04:16AM

Registered: 10 years ago
Posts: 78

Hi.

I bought the mega kit on gadgets3d.

I installed everything and I got movement first time yesterday.

But I get no response at all from heated bed.

And from the extruder motor I can test it by switching the wires to the y axis and it extrudes filament, but not on the extruder place.

What could it be?

Thank you in advance
I am using marlin firmware from gadgets3d. Is this a firmware problem?

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Crux

Re: problems: heated bed and extruder motor not working
June 09, 2013 11:54AM

Registered: 10 years ago
Posts: 78

I just found out that extruder should only work on higher hot end temperatures. I have not think about that. I will try that today.

But heated bed is not working. problem remains. Any idea why is this? Ia it firmware related?

I am using exact firmware as in this link: [github.com]

Should any addition configuration be made on the firmware? Any tuturial on this?

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misan

Re: problems: heated bed and extruder motor not working
June 09, 2013 03:32PM

Registered: 12 years ago
Posts: 972

Remember that RAMPS uses two different power supply inputs, one is just for the bed, the other for the rest of devices.

Are you applying power to the two inputs?

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Crux

Re: problems: heated bed and extruder motor not working
June 09, 2013 03:35PM

Registered: 10 years ago
Posts: 78

no. i didnt even know that

could you give more details on that?

here are the pics of it.

[www.dropbox.com]

check latest pics. they are newer.

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misan

Re: problems: heated bed and extruder motor not working
June 09, 2013 03:41PM

Registered: 12 years ago
Posts: 972

From RAMPS wiki page ...

500px-Rampswire14.svg.png

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Crux

Re: problems: heated bed and extruder motor not working
June 09, 2013 03:47PM

Registered: 10 years ago
Posts: 78

misan Wrote:
-------------------------------------------------------
> From RAMPS wiki page ...
>
> [reprap.org]
> swire14.svg/500px-Rampswire14.svg.png

well, i feel stupid right know.

would you believe i thought it was a 12v and a 20v input in those connections? so I just used the 12v.

thats what i learned when i saw this picture.

[farm7.staticflickr.com]

so you say to connect 12v from same psu on both 12v and 20v of that pic?

well, big thanks. will try that.

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misan

Re: problems: heated bed and extruder motor not working
June 09, 2013 03:51PM

Registered: 12 years ago
Posts: 972

RAMPS design gives you the freedom to use a different voltage for the heated bed. Whether you want to use 20V for it or not it depends on the details of your heated bed. Please note that a current is limited to 11A. I do use 12V on both rails 'cause my heated bed is for 12V.

Worst case scenario is your bed is designed for 20V, in that case it won't get hot enough.

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Crux

Re: problems: heated bed and extruder motor not working
June 09, 2013 04:32PM

Registered: 10 years ago
Posts: 78

I am using xbox 203W / 16.5A PSU unit

can i use it to connect to both 12v pins?

EDIT: This is the MK2a I bought [gadgets3d.com]

Edited 1 time(s). Last edit at 06/09/2013 04:44PM by Crux.

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misan

Re: problems: heated bed and extruder motor not working
June 09, 2013 05:05PM

Registered: 12 years ago
Posts: 972

Ok, this is what the site says: "This PCB can reach 100°C in about 5-10minutes. Power requirements 12V/10A. " so I guess you are all set. 12V for everything and you're good to go.

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Crux

Re: problems: heated bed and extruder motor not working
June 10, 2013 04:21AM

Registered: 10 years ago
Posts: 78

Thank you for the replies.

I will try that now. smiling smiley

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