Page 1 of 2

Heating bed over heats

Posted: Thu Mar 26, 2015 8:12 pm
by runaway380
When I power my i3 B the bed starts heating until it reaches 120°c i power down i tried changing the temperature from the firmware and slicer nothing seems to work
BW : ramps_for_i3 installed heated bed on : D8
Please advise me

Re: Heating bed over heats

Posted: Fri Mar 27, 2015 9:23 am
by zhangxueyou
Could you tell me if the temperature raises as you turn on your printer?

Re: Heating bed over heats

Posted: Fri Mar 27, 2015 9:43 am
by runaway380
Yes that's exactly what's happening to the bed as soon i turn up the printer

Re: Heating bed over heats

Posted: Fri Mar 27, 2015 10:19 am
by zhangxueyou
Please check if this parts, which are highlighted in the pictures, are short.
And confirm your hotted is connected to "+" and "-" of D8.
QQ图片20150327101554.jpg
QQ图片20150327101554.jpg (44.19 KiB) Viewed 12663 times
QQ图片20150327101549.jpg
QQ图片20150327101549.jpg (62.67 KiB) Viewed 12663 times
QQ图片20150327101541.jpg
QQ图片20150327101541.jpg (45.88 KiB) Viewed 12663 times
QQ图片20150327101526.jpg
QQ图片20150327101526.jpg (85.47 KiB) Viewed 12663 times

Re: Heating bed over heats

Posted: Fri Mar 27, 2015 10:31 am
by runaway380
Are they short in size or are they touching each other (shorted circuit )
And yes the hot end connected to D8+ & -

Re: Heating bed over heats

Posted: Fri Mar 27, 2015 10:35 am
by zhangxueyou
Yes, I mean whether they touch each other.

Re: Heating bed over heats

Posted: Fri Mar 27, 2015 11:04 am
by runaway380
Non of them are in touch with each other

Re: Heating bed over heats

Posted: Fri Mar 27, 2015 11:07 am
by zhangxueyou
Please try to re-burn the firmware.

Re: Heating bed over heats

Posted: Fri Mar 27, 2015 6:01 pm
by runaway380
I tried that more than five times nothing seems to stop the bed from heating rapidly

Re: Heating bed over heats

Posted: Fri Mar 27, 2015 9:25 pm
by runaway380
Thanks for your help