No, you do not want to do that and you want the shielding. The sense
pin directly goes to the mega1280 (AKA main chip). So that long
endstop wire acts like an antenna and any EMI RFI from the power
supply, motors, a nearby cell phone, could be picked up and shot
directly into the processor causing a glitch or print failure. The
metal shield being grounded in the cable prevents the inner wires from
acting like the antenna.
Also, the wire colors meant nothing. MakerBot used off the shelf
cables in a non-standard application. Never ever assume a wire color
And that said, that's why I specifically gave both the color and pin
location to identify the 5 volt pins which is white in your picture
and to the left.
The following preventions may be effective:
You can remove it from the plug (removes all chances of the short
blowing the regulator bus does disable the led on the endstop)
Put a fuse inline with the wire ( gives more failure points since you
cut and spliced the wire, possible short, and may not blow fast enough
to provide protection depending on the smallest fuse you can find).
Put a resistor in line around 1k ( the problem is, if you go a lower
value, then the short current would be higher and may still blow the
regulator, but then this 1k may not be enough to barely light the LED.
You are also splicing the wire and more possible short points).
Removing the wire from the shell is the simplest, it is reversable,
and completely removes the issue of shorting. At worst, if it shorts
again, the endstop simply doesn't work and you'll know it during the