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View Full Version : Do I ground the neg wires with my setup for Mini Govenor?


bostonkiter
10-08-2011, 08:20 PM
Compass 6HV 12s
Mini V Bar 5.2
WR Hercules BEC w/ 2x 6V outputs (6V running servos)
HW 70A HV ESC
Hyperion Phase sensor
---I read over and over to limit the hyperion voltage and did so with x3 diodes in-line on the positive wire, reducing the input voltage to 5.25. The power is coming from the second 6V output from the BEC, the other is to the V Bar.

---The phase sensor is "crimped" into one of the motor wire bullet connectors.

---The white signal wire is mounted facing up in Rx A.

---Gov mode is disabled in the HW ESC.

---The motor pole value (4), pinion and gear tooth count are entered correctly.

The phase sensor appears not to read the current rpms and the high / low limits don't behaive as MrMel shows during setup. I've read about somehow connecting negative wires to give the sensor "consistantcy", but I have no idea how to do this or if it's necessary in my case.

Any thoughts?! Thanks in advance. :noteworthy

Harbormaster
10-08-2011, 08:39 PM
Ulrich at the vstabi.info/en forum (Mr. VBar) says 6 volts is OK for the Hyperion phase sensor. http://www.vstabi.info/forum/read.php?26,67403,67403#msg-67403. It's working for me.

Personally, I would solder the connection and not crimp unless you have an absolutely bulletproof, vibration proof, corrosion proof crimp.

Top (closest to label) pin of RX A for signal wire is correct: http://www.66pacific.com/vbar_governor.aspx

> ---The motor pole value (4), pinion and gear tooth count are entered correctly.
So there are 8 poles in that motor and you divided by two, yes?

Have you seen these diagrams? http://vstabi.info/en/node/1046

As a rule in electrical and electronic systems, you want to have a single ground reference, not "grounds" daisy-chained all over the place. The ideal is to have your grounds ("-" in this case) all tied together at one place (right at the battery - lead would be ideal), and then have short direct leads radiating from there (a "star ground").

I hope that helps.




Compass 6HV 12s
Mini V Bar 5.2
WR Hercules BEC w/ 2x 6V outputs (6V running servos)
HW 70A HV ESC
Hyperion Phase sensor
---I read over and over to limit the hyperion voltage and did so with x3 diodes in-line on the positive wire, reducing the input voltage to 5.25. The power is coming from the second 6V output from the BEC, the other is to the V Bar.

---The phase sensor is "crimped" into one of the motor wire bullet connectors.

---The white signal wire is mounted facing up in Rx A.

---Gov mode is disabled in the HW ESC.

---The motor pole value (4), pinion and gear tooth count are entered correctly.

The phase sensor appears not to read the current rpms and the high / low limits don't behaive as MrMel shows during setup. I've read about somehow connecting negative wires to give the sensor "consistantcy", but I have no idea how to do this or if it's necessary in my case.

Any thoughts?! Thanks in advance. :noteworthy

bostonkiter
10-08-2011, 08:55 PM
Thanks for the check-in Harbor!

In reference to the link ( http://vstabi.info/en/node/1046 (http://vstabi.info/en/node/1046) ), I don't quite understand how the wires in Rx B work out. My esc is in B and sensor wire is in A the exact same way. Do the (+) and (-) leads from the esc and the sensor get spliced together some how to enter channel B together?

EDIT: I guess that's a yes! http://www.readyheli.com/MIK4351-Power-Supply-Cable-For-Mini-V-Bar_p_35429.html

I'm still a bit lost with the star ground bit. I'd need to see pics of someone else's setup to truly appreciate what the harness would look like.

Harbormaster
10-08-2011, 10:21 PM
My esc is in B and sensor wire is in A the exact same way. Do the (+) and (-) leads from the esc and the sensor get spliced together some how to enter channel B together?

You don't mean that you just plugged the Hyperion phase sensor into RX A do you? You have to split it into two plugs: one goes into RX C (the plus and minus) and the "sensor" line goes to the top pin of RX A. The photo in the link in my previous post shows how it's done.

Don't sweat the "star ground" stuff too much. But if you are powering your servos with a BEC, I would run the minus lead of the BEC to the - lead of VBar just to make sure they're all seeing the same ground.

Harbormaster
10-09-2011, 01:59 AM
Do the (+) and (-) leads from the esc and the sensor get spliced together some how to enter channel B together?

BTW, all of the VBar + pins are connected and all of the - pins are connected. Two devices that that are both receiving + and - are effectively linked for that reason. Only the signal pins are isolated.

Inverse
10-09-2011, 02:09 AM
I have the power for my phase sensor coming from RXC (6V from the VBar) and the signal cable for the phase sensor in the top of RXA.

bostonkiter
10-09-2011, 12:26 PM
But if you are powering your servos with a BEC, I would run the minus lead of the BEC to the - lead of VBar just to make sure they're all seeing the same ground.

What do you mean by "- lead of the Vbar"? Do you mean run a line from one neg to the other on both BEC outputs?

Currently, one output is plugged into the Vbar and one is free to use.

Harbormaster
10-09-2011, 01:05 PM
What do you mean by "- lead of the Vbar"? Do you mean run a line from one neg to the other on both BEC outputs?

Currently, one output is plugged into the Vbar and one is free to use.

Sorry, I meant any minus pin on the VBar (they're all connected).

So it looks like you're powering the VBar with the BEC and not just the servos. If that's the case, then there's no problem; all of the equipment should be seeing the same voltages.