Using gold motors

[ewan]

Using gold motors

The plan is Mod 0.8 gears from HPC gears at 3.8:1 ratio (I was quite surprised at the lack of range available from RS infact). The Mod 1 gears are just a tiny bit too big for my chassis which is a shame as they wouldve actually been far cheaper.

See if you can get hold of a couple of old 24v Golds and use their front plates instead of the ones fitted on the 12v ones.

Whats the advantage, it looks pretty similar in construction to the 24v version, although as with the bearing is the face mounting plate different? Im actually on the way to running the 12v at 18v, Im just planning to use 3 4AH 6v SLAs in series, just a nice and simple, cheap solution.

[stu]

Using gold motors

There is a huge difference from using the 12v front plate compared to the 24v front plate. As you and others have said, the 24v one has a Bearing in it - much nicer. I think there ataully mostly the same sizes etc, the 12v has a bush. No bg chnage to physical size, but getting more power, less friction, more life out of batteries, and nicer on the motor overall, the 24v plates are nearly a must have.

Mr Stu

[blazerbotics]

Using gold motors

Make sure you have alot of cooling on your motors; overvolting them + 6WD + Very small gear reduction = ALOT of heat! Look at how hot Alphas get and thats running them at there rated voltage.

[ewan]

Using gold motors

Out of interest, do you blow air away from the motors or onto them (Or even both ?) with the fan in alpha?

Thanks for the advise guys

[blazerbotics]

Using gold motors

I dont use the fan anymore as it kept breaking (the fins kept snapping off during fights). But it worked by sucking the air from the side sections and blowing them in the direction of the batteries and motors. You might be best to try a strap a couple of computer fans on the motors.

I have also drilled air vents in the motor cases to allow air in. Stiff Breeze also has holes drilled in the motors and hes running a very similar setup to you.

[stu]

Using gold motors

Yeah drilling Air vent holes into the motors is a good idea. Kitty first to do it LOL! Does make a big difference.

Just make sure you clear out all the bits of metal before you put it back together or big problems arise.

Mr Stu

[grant_ploughbot]

Using gold motors

You will have to keep a VERY close eye on the motors heating up, you would probably want to mount them in ali or something to act as a heat sink with the fan cooling that. PloughBots lifter motor gets almost red hot. and that isnt running all the time. It sends paper brown and can nearly set tissue on fire after a fight so be warned and be careful!

[big_nipper]

Using gold motors

At this point I should point out that we turned down the motor casing to save weight and this disturbed the magnetic circuit and resulted in poor efficiency causing the motor draw more current and to heat up more.

I assume adding holes would casue a similar effect and not to mention the increased EMI casuing more http://www.x2y.com/cube/x2y.nsf/1/07...72604FDCM.pdf>

[blazerbotics]

Using gold motors

I have not noticed any problems, but i have just drilled one single hole which is inline with the joint in the magnets (therefore in theory if there is any effect it should be equal). The hole is as far away from the magnets as possible (level with the brushes). There may be a small drop in efficiency but its not been noticable.

[stu]

Using gold motors

Cant say there are any EMI problems with Kitty with all the holes drilled in the motor. But know in other cases when you do the same with motors, things happen. So yeah something to watch as Mark said.

Mr Stu

PS - Dogs looking cool Mark!

[ewan]

Using gold motors

I think Ill just use a big lump of ali milled out to accept the motor body for both mounting and heat conduction, shouldnt cause any efficiancy or EMI problems.

So far Ive just modded the leads to 6mm2 silicone cable which is nice and beefy compared to the weedy cables which came with the motors.
Ill hopefully put a gold mod page on my site soon. Ill try and get my hands on some 24v golds asap

[grant_ploughbot]

Using gold motors

sounds kool. would a steel ring aroung the motor casing increase the power of golds?

Has any1 tryed this?

[blazerbotics]

Using gold motors

I have thought about that as well, if i get time ill give it ago for next event. I know drill motors have a extra steel sleve that improves the performance. I suppose it depends how effective the casing already is and wether it will make much differance.

[knightrous]

Using gold motors

The extra steel sleeve on the drill motors is actually to be slid over the ventilation holes during manufacture so no crap or swaff goes inside the motor, its also handy for when you have to drill around your motors

[maddox]

Using gold motors

The steel ring can enhance the torque of the motor, by containing the magnetic field inside the can.
Easy way to see if the can is thick enough is to use a thin piece of steel. If it sticks to the can, the magnetic field is not contained entirely, ans therefor loses a little force. The stronger the attraction on the outside of the can, the worse it is.