Featherweight Drive Motors

[Danjr1]

Re: Featherweight Drive Motors

bought a couple myself. They are a copy of a speed 900. Similar specs and dimensionally the same. They drew the same no load currents when I tested them as well.

Did they work out for you? I'm thinking of replacing my overvolted 18v drill motors with them.

[Danjr1]

Re: Featherweight Drive Motors

Also, what kinda ratio would you run to a 75mm or 100mm wheel if the motor was running on 22.2v lipos?

[maddox10]

Re: Featherweight Drive Motors

for 20km/h 100mm you need a 13/1 ratio

[Eventorizon]

Re: Featherweight Drive Motors

Hi All

I am building my very first featherweight, Shrapnel,

[attachment=2:3rtvkz2c]Comp Shrapnel MKII Assem 05.jpeg[/attachment:3rtvkz2c]

[attachment=1:3rtvkz2c]Comp Shrapnel Proto 01.jpeg[/attachment:3rtvkz2c]

[attachment=0:3rtvkz2c]Comp Shrapnel Proto 04.jpeg[/attachment:3rtvkz2c]

and I have already made a mistake with motors...

http://www.technobotsonline.com/re-540- ... -50-1.html

These are the ones I was going to use but after a chat with James Cooper from Robochallenge he recommended that I use something else. I know that drill motors are a good choice and I found these, on the same site stupidly, which might serve as a replacement€¦

http://www.technobotsonline.com/re-975d ... x-4-1.html

Would running 4 of these (not necessarily this ratio) be a good choice? What do the veterans think?

Also I need a motor to drive my weapon, a 2kg spinning disc. I am using 2x 7.2v 5.1 Ah NiMH racing battery packs, wired in series, for the power which puts, as far as I know, ampflow/brushless LiPol motors out of contention. Any recommendations.

Thank you in advance

Alex

[blazerbotics]

Re: Featherweight Drive Motors

Bosch 35's for drive, you might get away with just one each side.

[Eventorizon]

Re: Featherweight Drive Motors

Thanks, do you have a link for any or when I could buy them? I can only find chainsaws

[PJ-27]

Re: Featherweight Drive Motors

That robot looks great! Nice to see a very different design and I like all the laser cutting.

Bosch 35 are found in the electric car seat assemblies of Jags, eBay, Scrap yards, are yoru best bet. Do you not want to use Drills because of size constraints?

[blazerbotics]

Re: Featherweight Drive Motors

Theres two on one of these http://www.ebay.co.uk/itm/JAGUAR-XJ40-X ... 20be5252b7 what size wheels are you planning on using?

[Anttazz]

Re: Featherweight Drive Motors

Spinning weapon standard is a Speed 900 motor http://www.cornwallmodelboats.co.uk/aca ... _6373.html. and you could run it off a relay rather than an expensive speed controller and it'll work nicely.

I have a set of the 919D motors* that I took out of an old FW if they are any use to you. I replaced them with drill motors before using them, but they do run on up to 15v whereas the ones in your link (to replace the current ones with) only run at up to 12v I think it says. Saying that, it will probably work at 14.4 that you're using but might burn out sooner. Bosch 35w's or drill motors seem to be more popular though

* http://www.technobotsonline.com/?subcat ... cts.search

[Eventorizon]

Re: Featherweight Drive Motors

Thanks, though the actual cutting was done at my university, if only I had my own cutter.... (day dreaming)

Is it only jaguars or are they in other cars to? I have been to my scrapyard before and picked up a pair of windscreen wiper motors for another project but there was not a single jaguar there! Plenty of Renault Clios and Pergeto 206's but no jags...

I am guessing you mean I should use these for drive btw, not the weapon?

[Anttazz]

Re: Featherweight Drive Motors

Yup, Bosch 35w for the drive and possibly a Speed 900 for the weapon

[PJ-27]

Re: Featherweight Drive Motors

Or a car radiator fan motor for the weapon (or so I've been advised) currently building a robot with one, I'll let you know how it works out!

And there's a reason scrappies are full of 206's and Clio's.......

[ewan]

Re: Featherweight Drive Motors

This may interest a few of you: viewtopic.php?f=168&t=4612

[Kenny]

Re: Featherweight Drive Motors

I would recomend the banebot gear box's can fit a 550 motor on but later if needed more power the motors can be swapped with something more powerful and the gearboxs are made to withstand , i've bought a pair to make a feather with

[Eventorizon]

Re: Featherweight Drive Motors

Those Gimson GR01's look perfect! How many of you use those or would you recommend them anyway?