I have upgraded to a 40Amp Automotive Relay
works great.. hope it stays that way :)http://3dprintboard.com/attachment.p...tid=5008&stc=1
Printable View
I have upgraded to a 40Amp Automotive Relay
works great.. hope it stays that way :)http://3dprintboard.com/attachment.p...tid=5008&stc=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.
i will have to look into that... if nothing more than to get rid of the screw clamps and go to crimps
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.
Could someone post a wiring diagram for using one of those automotive relays?
... Got a 30A auto relay... All I could find... It melted wires today... Gonna get a 40A to hopefully fix it
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
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.