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Thread: Heated Bed wiring meltdown
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02-19-2015, 10:36 PM #21
- Join Date
- Dec 2014
- Location
- Canada
- Posts
- 498
I have upgraded to a 40Amp Automotive Relay
works great.. hope it stays that way
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02-20-2015, 12:33 PM #22
- Join Date
- Dec 2014
- Posts
- 1
Me too after having exactly the same problem as Adam. Only gets lukewarm even when working hard. No problem with the wires to the heat bed either.
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02-20-2015, 12:51 PM #23
- Join Date
- Nov 2014
- Posts
- 522
i will have to look into that... if nothing more than to get rid of the screw clamps and go to crimps
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02-28-2015, 12:57 AM #24
I created this to support the bundle of cables coming from the PCB. It attaches to the wooden part below the heater PCB.
http://www.thingiverse.com/thing:702335
I figure it might help keep those wires from breaking loose on the PCB side.
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03-12-2015, 03:21 AM #25
- Join Date
- Feb 2015
- Posts
- 1
Could someone post a wiring diagram for using one of those automotive relays?
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03-12-2015, 05:52 AM #26
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03-20-2015, 09:02 PM #27
- Join Date
- Nov 2014
- Posts
- 522
... Got a 30A auto relay... All I could find... It melted wires today... Gonna get a 40A to hopefully fix it
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03-21-2015, 11:46 AM #28
- Join Date
- Oct 2014
- Posts
- 9
Being an rc guy we usually use the 5 second rule.. my bed wires are at about 1 second.. gonna replace with 14wag silicone wire this week
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03-21-2015, 12:20 PM #29
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03-21-2015, 02:46 PM #30
- Join Date
- Feb 2015
- Posts
- 211
The relays aren't what is causing these wires to melt.
A poor connection is what is causing it.
When you have a poor connection it creates resistance, resistance creates heat, heat causes the connection to become worse creating more resistance and more heat until you have a failure.
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