Peter Wallers Fleas

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peterwaller
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Peter Wallers Fleas

Post by peterwaller » Thu Jan 22, 2015 5:03 pm

Just realised I never set up a thread for my fleas.
Recently I was having a discussion with Alex and Rory as to why an Ant I think it was Rory's had a much faster flip than my flea Fleapit even though it used the same servo running from the two cell pack directly.
The conclusion was that they were using a switch while I was using the throttle stick.
Now I had intended to use the switch and had bound it to the transmitter I had modified for use with Militant my elastic flipper but for some reason the switch didn't work on the flea and I never got round to finding out why.
It turns out the mod I did on the transmitter was to fit a switch wired to the throttle cut button and all I needed to do was turn on throttle cut for fleapit.
The effect was quite marked so much so that the robot would flip itself onto its rear if I flipped it with no robot on the scoop.
A slight change of linkage has now cured this and it is now a much better flipper.

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Rapidrory
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Re: Peter Wallers Fleas

Post by Rapidrory » Thu Jan 22, 2015 5:18 pm

Glad to hear it :) Yeah, I find that having the switch makes it so much easier to time flips correctly. I feel I may have rather shot myself in the foot here as Fleapit was already one of my main fleaweight advisories :roll:
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Shakey
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Re: Peter Wallers Fleas

Post by Shakey » Thu Jan 22, 2015 7:30 pm

Carbon was the ant running the identical setup. :) Sounds like the switch has certainly made it a much more fearsome robot to face! Without a switch I just wasn't able to move the stick fast enough to keep up with that servo though mainly it's because I'm silly and would probably accidentally leave the servo halfway up without my throttle hold/cut setup.
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Re: Peter Wallers Fleas

Post by Hogi » Thu Jan 22, 2015 7:31 pm

my flea can run inverted and self right so i'll be ok unless you have enough power to clear the walls on the dropoff sides. :)
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Re: Peter Wallers Fleas

Post by peterwaller » Tue Jan 27, 2015 7:49 pm

I have just been working on Deflea and have decided to dispense with the titanium armour as it always seems to get ripped off and as can be seen from the video once that was removed the printed chassis although shedding odd bits seem to stand up much better to Ickle.
Fleabites spinner stopped again but this time because one of the 3 motor wires was removed.

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Re: Peter Wallers Fleas

Post by Remote-Controlled Dave » Tue Jan 27, 2015 8:31 pm

I was going to say Peter, it almost worked better with flat ramming sides than wedges.
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Re: Peter Wallers Fleas

Post by peterwaller » Wed Jan 28, 2015 10:06 am

My thoughts precisely.
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Last edited by peterwaller on Fri Jul 21, 2017 7:41 pm, edited 1 time in total.

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Re: Peter Wallers Fleas

Post by razerdave » Wed Jan 28, 2015 6:01 pm

Much better :)

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Re: Peter Wallers Fleas

Post by peterwaller » Tue Feb 03, 2015 8:07 pm

I have been going to upgrade Fleabite for some time but not got round to it but thanks to Dave I think it was chopping off one of the wires from the brushless now seems a good time.
I have been wanting to change it to the configuration used in Anticyclone with the spinner inline with the drive axel but it is difficult to get two motor gearboxes and the spinner in 75mm.
I think I have found the answer by adding a rightangle gear arrangement.
I will let you know if it works out

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Re: Peter Wallers Fleas

Post by razerdave » Tue Feb 03, 2015 8:58 pm

My bad :)

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Rapidrory
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Re: Peter Wallers Fleas

Post by Rapidrory » Tue Feb 03, 2015 9:03 pm

Is the right angle gear necessary? I'd have thought it'd be easier to just shift the motor back a little and use either a belt or a straight gear drive...
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Re: Peter Wallers Fleas

Post by peterwaller » Wed Feb 04, 2015 9:40 am

A right angle is not essential but it is not much more difficult than straight gears and I am not a fan of belts at this sort of scale they tend to stretch.
This is the sort of thing I am looking at.
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I know it is more normal to have the gears round the other way but the crown wheel had a 3mm inteference fit hole so was ideal for the motor shaft and the other gear had a 2mm hole which I tapped out to M2.5 to fit the threaded shaft.
It also means the drive is 1.5 times faster instead of 1.5 time slower.
Last edited by peterwaller on Fri Jul 21, 2017 7:42 pm, edited 1 time in total.

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Rapidrory
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Re: Peter Wallers Fleas

Post by Rapidrory » Wed Feb 04, 2015 12:08 pm

Ah ok, I thought you were moving the spinner motor instead of the drive motors. That looks very nice :)
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Re: Peter Wallers Fleas

Post by peterwaller » Wed Feb 04, 2015 3:56 pm

It is starting to take shape but is looking a bit heavy at 52 gms without spinner, batteries or electronics.
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Image
Last edited by peterwaller on Fri Jul 21, 2017 7:43 pm, edited 1 time in total.

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Rapidrory
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Re: Peter Wallers Fleas

Post by Rapidrory » Wed Feb 04, 2015 9:39 pm

Looking good so far. I've never yet been drawn against fleabite.. neither of my fleas are particularly spinner proof, so I'm now looking forward to the inevitable even less :P

The motors are usually the bulk of the weight so 23g isn't too bad I'd say; though it may have to be a pretty small battery or a light blade.. that said; HSOD's blade is only 6g and that seemed to work pretty well :L
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