PunchRC Esc

[crawl]

Anyone else flying their PunchRC Esc yet?

How are you finding it? What settings have you used?

Just curious to share data.

[Ah Clem]

Crawl,

I have been flying one in a Trex 700E (I know, heresy) for the last couple of weeks now (the Trex is the test vehicle for the speed control).

It works very, very well and is only warm when I land (one dozen flights, so far).

Lots of power and good, proportional throttle response.

Nice soft start up by the way (smooth initially, then proportional immediately).

Mine is set for the Align MX motor, so my settings will be different from yours-I can find them and post them if it will help any.

[Rob43]

I've not seen any instructions concerning use of the red wire for spark suppression. Is the resistor integral, or must I provide it. If so, what ohm value? I've seen posts before, but don't know about this ESC.

[crawl]

I've not seen any instructions concerning use of the red wire for spark suppression. Is the resistor integral, or must I provide it. If so, what ohm value? I've seen posts before, but don't know about this ESC.

As of last I checked, no one knows that answer.

I have mine hooked up with the assumption that it is integral, it appears to be working.

[Rob43]

How hooked up, Chris? Does it need a connector of it's own, and a sequence of connection?

Also, I was hoping to learn the most intelligent method of connecting BEC leads so that I can disconnect the ESC while the BEC is powered.

Thanks

[crawl]

I can take a picture when I get home that would make it much easier.

But I have my series connector going to bullet connectors to the ESC.

I have the red spark arrestor soldered to the side of the + bullet on the Series connector side. That way I can leave the negative bullet pretty much always attached. When I plug in both batteries it makes a connection (since the spark arrestor goes to the esc from the series connector side). Then when I make the + bullet connection to the esc it does not spark.

[Rob43]

Thanks. Pic would be cool. I know Skunkworx liked how his WR BEC gave him the opportunity to have separate connections for each the ESC and BEC, so it's possible to operate the receiver and servos for setup changes without powering the motor. I had this on my 550, and it's covenient.

[crawl]

http://www.indiecc.com/sparkarrestor.jpg

quick diagram with my super artistic skills.

Keep in mind I don't use a bec.

It's quite easy and convenient indeed, I turn on the switch for my rx pack and I get full servo etc usage and no motor power.

[TheBum]

If you run the BEC off 6S, you don't have to do anything special: just connect one pack to the connector that spans the BEC power wires and leave the other battery connector dangling.

I run the BEC on my 6HV across all 12S and wired it into a Y-adapter, so I can connect two packs, or one pack and a jumper I built, and just leave the root of the Y disconnected.

[Rob43]

Alan, do you have a schematic? Again, I assume the resistor is integral to the Punch ESC. I believe it will be similar to the setup you said you're using. My BEC will connect to my y-adapter for the packs with an EC3, so I can remove the y-adapter easily. I would connect my packs to the Y-adapter first, like I do on my 6HV (Kontronik, no external BEC, or spark arrestor).I could solder the spark arrester lead to the same location on the y-adapter, just before connecting the ESC, I suppose. I think it's simply gradually charging the caps before main connector is connected to reduce the potential difference. With a simple bullet connector for the spark arrester, I could disconnect it if I am working on setup or troubleshooting, right?

[TheBum]

Alan, do you have a schematic? Again, I assume the resistor is integral to the Punch ESC.

Let me link you do the threads where I've already posted them. The first link is assuming the wire connects to a resistor in the ESC wiring toward the unit itself.

http://www.helifreak.com/showpost.php?p=2388652&postcount=2

The second link assumes the resistor is toward the end of the wiring where the connectors are attached and also shows how a 6S BEC connection is done. The two rectangles under the spark arrestor resistor represent bullet connectors.

http://www.helifreak.com/showpost.php?p=3029958&postcount=4

[Rob43]

So far, there is no info on whether the ESC alread contains a resistor inside for the spark arrest lead...I supposed a second resistor wouldn't hurt.

[TheBum]

So far, there is no info on whether the ESC alread contains a resistor inside for the spark arrest lead...I supposed a second resistor wouldn't hurt.

Put a multimeter in resistance mode across the extra wire and the red main power wire. If you measure any resistance (it might be 10 ohms or lower), then the resistor is already there.

[Rob43]

Thanks for the tip. Will do.

[Rob43]

Alan - I measured 99 ohms with my mutlimeter this evening.

[TheBum]

Sounds like they're using a 100 ohm resistor then. That's a higher value than the HW ESCs use, but it must work OK.

[Inverse]

http://www.indiecc.com/sparkarrestor.jpg


fixed your pic :)

[crawl]

huh?

[Rob43]

+1...Whiskey Tango Foxtrot?

[crawl]

Hey Ah Chlem clean out your inbox :rotf

[Rob43]

+1. I tried twice lately to no avail. Well after I typed too much :arggg: