Fail safe issues

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coolspeedbot
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Fail safe issues

Postby coolspeedbot » Sun Jun 26, 2016 7:42 am

Hi guys, thought I start getting involved here as well as on the FRA forums.

So the Issue I am having is that both my Ant Weight Killer-Wolf and my brother's unfinished robot Catch-Cat, don't go into a safe state when they lose connection to the transmitters which is a safety issue, I recorded the robots losing connection.

Killer-Wolf:
https://youtu.be/cTH5a5YAJXY

Catch-Cat:
https://youtu.be/ObjzNUXz7Eo

I would guess I would need to add a fail safe to both of them, if thats the case, can anyone recommend any?

If anyone can give me the solution that would be most helpful.

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peterwaller
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Re: Fail safe issues

Postby peterwaller » Sun Jun 26, 2016 9:01 am

Under the rules for antweights it only states that the weapon should stop so I don't see you have a problem.
2e) Failsafe: in the absence of other transmitters, the robot weapon shall cease motion when the controlling transmitter is switched off.

This was written in the days of 40 MHz radio when receivers were liable to respond to transmitters on adjacent channels when their transmitter was off but with modern 2.4 GHz systems even that doesn't happen now.
Normally the 2.4 GHz receivers on loss of signal are designed to continue outputting 1.5 ms pulses (stick centered ) on all channels but the throttle channel (in our case weapon) which goes to the failsafe position normally throttle shut.
Many but not necessarily all of the receivers have the ability to set the failsafe throttle position to the position of the throttle stick when the transmitter and receiver is bound.
If yours does this all you need do is put the throttle stick in the position you prefer I suggest flipper down as your robot is less vulnerable in that position and then rebind the receiver to the transmitter.

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coolspeedbot
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Re: Fail safe issues

Postby coolspeedbot » Sun Jun 26, 2016 9:24 am

I don't think my revivers do that, but I'll give that a try when I get back to Dover as I don't have a bind plug handy.

Also thanks for Pointing out that only the weapon needs a fail safe.
James Booth
Team Coolspeedbot

Antweights:
Killer-Wolf (2 nearly complete), Bunny-Ears (1.5), HB (CAD).
Featherweights:
Wolf-E (under construction).

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Rapidrory
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Re: Fail safe issues

Postby Rapidrory » Sun Jun 26, 2016 10:33 pm

Yeah, just rebind the receiver to the transmitter and it should be fine.
Rory Mangles - Team Mangler

Robots: Too Many...

NanoTwo antweight speed controllers. (viewtopic.php?f=1&t=2128)

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coolspeedbot
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Re: Fail safe issues

Postby coolspeedbot » Tue Jul 05, 2016 1:18 pm

guys I just tried rebinding but the servo still springs up on loss of transmitter.
James Booth
Team Coolspeedbot

Antweights:
Killer-Wolf (2 nearly complete), Bunny-Ears (1.5), HB (CAD).
Featherweights:
Wolf-E (under construction).

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Shakey
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Re: Fail safe issues

Postby Shakey » Tue Jul 05, 2016 7:23 pm

That's fine, as long as the weapon goes to somewhere and stays there it's fine. If it keeps moving not so good.
Nuts And Bots - For all your components and ready built antweights!

Alex Shakespeare - Team Shakey / Nuts And Bots:
AWS 44, 45, 49 & 51 Winner - Far too many robots!

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coolspeedbot
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Re: Fail safe issues

Postby coolspeedbot » Tue Jul 05, 2016 7:56 pm

Shakey wrote:That's fine, as long as the weapon goes to somewhere and stays there it's fine. If it keeps moving not so good.


It would if the receiver would detect my transmitter so it's effectively dead, Thankfully I had a new receiver arrive in the post, it was meant for my first feather weight but it does a good job in Killer-wolf.
James Booth
Team Coolspeedbot

Antweights:
Killer-Wolf (2 nearly complete), Bunny-Ears (1.5), HB (CAD).
Featherweights:
Wolf-E (under construction).


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