Answered: Y 2-wire

[TriDragon]

Hi Karthik,

We were pondering using ports 1 and 10 of the cortex for a launcher, but it needs to run 2x motors on port 1 and 2x motors on port 10.

Is it legal to use a 2-wire extension to a 3-wire Y-cable? No modification of the wires is done at all.

[TriDragon]

I guess I found the answer:

<R12> A maximum of one (1) VEX Y-cable can be used per Motor Port of the Microcontroller or Power Expander. (You cannot “Y off a Y” to have more than two (2) motors controlled by the same Motor Port.)
a. Teams using the VEX ARM® Cortex®-based Microcontroller can only power one (1) 2-wire Motor per each of the two 2-wire motor ports on the Microcontroller. It is illegal to “Y” off a 2- wire Motor Port.

That’s a shame from a controls standpoint with the faster update rates.

[Karthik]

@TriDragon

I guess I found the answer:

<R12> A maximum of one (1) VEX Y-cable can be used per Motor Port of the Microcontroller or Power Expander. (You cannot “Y off a Y” to have more than two (2) motors controlled by the same Motor Port.)
a. Teams using the VEX ARM® Cortex®-based Microcontroller can only power one (1) 2-wire Motor per each of the two 2-wire motor ports on the Microcontroller. It is illegal to “Y” off a 2- wire Motor Port.

That’s a shame from a controls standpoint with the faster update rates.

Yes, your answer is correct.