Protecting the board from heater short
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Hi,
every heater cartridge has 2 little wires that can brake and touch the block or the user can accidentali touch them with a tool during nozzle replacement causing a short.Is it possible to protect the mosfet from burning by adding a fuse ?
With a 40W 24v heater element what fuse rating should I use ?
Fast blow or slow ?
thx
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A 2A quick blow fuse would protect against fire, but would not necessarily protect the mosfet.
However, the nozzle should not be changed while the printer is powered up.
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The nozzle should be changed while hot as long as i know, otherwise is very hard to unscrew.
I now we can heat the nozzle then turn off the heater and unscrew the nozzle but as you know some user may forget to turn the heater off
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@paboman Than you not have the knowledge to change a nozzle.....
its like the electrician in you're house, when you change a fuse.
you know that you do something that is important -
@mickey30m maybe...I do not know a lot of things
till now I have always heated the nozzle in order to be able to unscrew it without breaking the heatbreak (the E3D)
Do You change nozzle at room temp ?
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@paboman when i need to change it.
I do 220 C hotend and extrude some filament And then remove my filament. Then i disconnect everything and losen my nozzle while i hold my heater block.
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cant see any difference between our methods...you heat the hotend also and I also turn off the heater after reaching the temp.
