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Re: High power drive motors
That's a shame, but I may try and order 4 clone motors as Doorstop showed it could be put in weight
That's a shame, but I may try and order 4 clone motors as Doorstop showed it could be put in weight
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Re: High power drive motors
all i can say is that it is possible but consider the weight very carefully in the design stage. It generally depends on what you want from a bot. a two speed 900 driven bot will easily push 13.6kgs about and thats the general direction I'm going with doorstop now. the weight saved can go on armour and/or weapon.
Personally, I would say go for Gimsons if you're using a weapon and the speed 900 route if you're build a wedge/rammer.Comment
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Re: High power drive motors
Originally posted by mr_turbulence
I got a several of 5 pole johnsons (got them from a US source). Those have a 1/4 shaft (6.35mm, got the drill and reamer for that).
And yes, it's perfectly possible that Johnson made a series with a longer shaft.Comment
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Re: High power drive motors
Could you get away with running a speed 900 off 1 Electronize ESC, the FR30HX model, or would you have to move to Victor 883's.Comment
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Re: High power drive motors
it should be able to handle it if you do the external relay modification to itComment
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Re: High power drive motors
The Speed 900s want something like 40a continuous to run at full power.
You could probably run them with lesser ESCs. but they'd get rather warm and why fork out for a Speed900 if you're then just going to starve it of potential current. Might aswell get a cheaper motor.
Besides the amount of problems people have had with Speed900s breaking this year has been crazy! If I was forking out £100 for a pair of motors I'd expect more.Comment
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Re: High power drive motors
Who could do this mod? Mega interested in this!Originally posted by typhoon_driverComment
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Re: High power drive motors
You can. You just have to desolder the current relay in place and then switch it out with two 40A automotive relays. Getting the wiring right can be the trickiest part but it's not that much of a ball acheComment
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Re: High power drive motors
The relay that pokes out the top yes?
This sounds nice and Bitza! I'm assuming you'll need 2 relays per ESC, but could you use 1 5pole Switching relay instead?Comment
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Re: High power drive motors
Lol it looks like the old ways have been forgotten! Yeah you need two relays to do the swap out. Basically unsolder the 8 pins from the current relay, solder in wires to each of the 8 connections and then wire them up appropriately onto the relay with the coil side and the power side. There used to be a guide kicking about somewhere that i'll find if i have the time.Comment
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Re: High power drive motors
What is the advantage of putting a 30a external relay on a 30a ESC?......Comment
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Re: High power drive motors
well easy of change out for one if you use space connectors but the other reason is that the automotive relays generally will run slightly higher than the 30A. You could also throw 40A relays in there. Possibly something bigger but i've never experimented (might do so at some point as i have a few spare controllers and now need to control some dewalts)Comment
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Re: High power drive motors
The speed 900's are £35-38 each, well they were from the company I chose, but I think I burned mine out as the disc was touching the floor half the time and stalling the motor, see Conker vs Inertia vs 4 4 toon
If I could swap my Gimson's for a single speed 900 and drive the rear wheels with a belt drive I could save a ton of space inside the robot and gain loads of push
and loads of weight 
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Re: High power drive motors
May try the relay swap on our 15a ones. I think we're starving the dewalt motors we have of current. Gunna make the ESCs huge though!Comment
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