V5 Cables

How do you plan on crimping a cable with that many pins? Individually instead of all the pins at once?

Also it looks like none of the standards for PoE come close to the power requirements of a V5 motor …

Someone with vex did comment, in the official Q&A where the question was asked weeks ago:
https://www.robotevents.com/VRC/2018-2019/QA/35

To add on, the most common standard for PoE uses 48 V, which requires both boost circuitry at the source and buck circuitry at the sink to be useful. The reason for 48 V is to mitigate the losses (especially heat) from higher currents.

The only remote hope of V5 working safely with off-the-shelf cabling would be if the Brain had boost conversion and every motor had a buck converter, which would require both the Brain and motors to be larger and more expensive.

I think the competitively-priced (yes, I think so too) cabling is far more reasonable.

@dcjrracing11 While Cat5 might be cheap, I wouldn’t trust it for PoE use, let alone V5. Cat6, of which I would trust reputable brands’ cabling, is priced about the same as VEX cabling.

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Again, it is not what you wish, but what the rules explicitly state - it will not pass inspection since it is not made from VEX branded bulk cable. Not worth arguing, since 99% sure the GDC will not change this rule.

As for the electrical characteristics needed, others have commented to those points.

I called Vex and they said the cables, ends and tool were in stock and would ship immediately? That was Friday, I’ll let you know when they actually arrive.

Aside from the rules stating that V5 smart cables must be used for competition. Not all cables are created equal, here is a comparison, I don’t have specs for either the VEX cable or the random silver 4 conductor phone cable I had, but there’s a significant difference.

smart_cable.jpg

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careful, looks like you stripped the insulator on common of your VEX cable :). Was that using the new VEX tool or you pocket knife?

(humor)

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haha, yes I saw that after I took the photo. No, I do not have the VEX tool.

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Kids, don’t do this at home…

we learned the hard way at worlds what happens when you short main battery leads in competition.

Black is actually not common, it’s one of the signal wires.

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oops - see, that’s why I won’t be allowed to touch nice things :slight_smile:

I just received the cables, ends and tool ordered last week. Also the balance of V5 motors ordered in July, we now have enough motors for (8) per robot. Vex is working through this. Thank you Vex.

still nothing here - we ordered in june/july

Is it tools/cable stock that you are missing? If so contact vex support; I ordered mine in August and they shipped in a day or two.

Bundles and motors.

as for contacting VEX support you can not via email because they do not have time…

We are missing tools and cable stock, but it said it would ship in 8 weeks from our order. It is still processing but should ship next week. To be fair, we did have a large order of stock so I understand not getting it very fast.

Has anyone received an e-mail response from VEX sales lately? Its been a couple weeks for me.

Got an email yesterday saying they needed more information about my order - I gave them the info - have not heard back from them. So, pretty much waiting game.’

In the email they indicated that they were hoping to get more systems out this coming week.

Does anyone know what gauge wire is used in the v5 smart cables? It appears to be 24 awg from @jpearman 's picture, but I’d like to be sure…

To be clear, you may not make your own cables for competition. VEX Cable stock is labeled with V5 logo, so it can spotted during inspection.

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