starting my MoaxX (pimp cane style MOA maxx)

[SilverRidge]

Hi, the idea came to me building a emaxx crawler for someone else, I've found cheap emaxx axles on ebay , I already had two 18:1, 6v 5poles geared 600 motors here ,and simple thing is what often works the best so I came with a U channel torsion chassis

I've ordered a futaba s3306 1/5 scale servo for the steering but it doesn't work:-( so I'll wait they send me a new one

I project to make a three steps front dig with a servo and two micocontacts ( 4wd, free rear, short circuited rear motor) or maybe a rotary button if the mini servo can turn it



















cost must be low so it's fake beadlocks on mambo wheels reduced to 60mm wide to fit the moab xl's



the great thing with the maxx diff is it can be mounted reversed, so the two motors turn the same direction , no problems of different timings
I also wait a fg 1/5 jeep body to put on

[corkysk8]

Very nice! I have been thinking of the same thing. Could you show a close up of how you have the motor to pinion connected?

[Bigcatnearmiss]

Cool...Now this project is thinking outside of the box. =)
Can't wait to see it in action..
Cheers.

[Defender]

wow good build! can we get some close ups or info on how you did the MOA..PLZ.!

[pitass]

looks great!

can you show us how u fitted the motors to the axles pls?

[SilverRidge]

I just made a plastic plate to have the good offset to fit the motor mount and a tube Ø6-12mm with two threads to transmit the power to the diff , the motor is 'floating ' the nylstop nuts are a bit loose cause the diff and the motor could not be precisely aligned to prevent breaking of the junction tube due to hyperstatism.



here are the motor specs:
Dimensions : 36 mm x 101,6 mm
Nb tours-MN à vide : 340 U/min
Courant a vide : 0,75 A
Nb de tours MN : 326 U/min
Courant en charge : 1,55 A
Couple moteur amxi vide : 2,45 Nm
Axe : 6 mm x 15 mm
Tension de fonct : 6 V
Rap de réd : 18:1
tr min a 12 V : 340 U/min

a 50:1version also exists

Dimensions : 36 mm x 106 mm
Nb tours-MN à vide : 122 U/min
Courant a vide : 0,70 A
Nb de tours MN : 116 U/min
Courant en charge : 1,80 A
Couple moteur amxi vide : 5,88 Nm
Axe : 6 mm x 16,9 mm
Tension de fonct : 6 V
Rap de réd : 50:1
tr min a 12 V : 122 U/min

[pitass]

wow thanks for the info!

[corkysk8]

Thank you for the close up shot.

[4xFord]

Very cool and original! Do you think those gears in the reduction unit will last?

[SilverRidge]

I run one of these in my scale since last year and never had a problem with it's often the dogbone connecting the motor to the T case that bents and pop off in the scale rig ...

, in this one there is many weaker part that could fail before: 14mm wheels hex , front emaxx driveshafts ( I 'll wait they break to change them for revo ones like the rear)

[SilverRidge]

I've forgot to mention one important detail: I have two rear axle with rear bulkeads: the front bulkhead have an anti squat angle that I ' m not sure it would allow to align the motor and diff case just with a tube using this kind of mounting , the offset plat should be angled to counter the anti squat angle

[username]

are those drill motors or what are they from?

[brokenb4]

Very interesting, something I haven't seen before.

[SilverRidge]

I received the 1/5 jeep body yesterday , but it's even more badly proportionned than the hpî one , so I cut one inch to the hood lenght the windshield is still to angled and I messed masking the windows , I hate masking job ! : there is not stickers with the body ,I tried brake fluid to correct it but it doesn't seem to work so I think I 'll cut them with the dremel .

the front headlights reflectors are from cheap led torch lamps

[SilverRidge]

the 1/4 servo is still not replaced but I've received some micro switch so here're the rear dig pics:








there are 3 positions: when the servo horn is in the middle it's 4wd , one side it disconects one rear motor wire, and the other side it disconects the motor from the esc and short circuit the motor to increase rear braking : on very aggressive surfaces the rear wheels may turn and reverse the transmission if I only had the first step dig , it could be usefull on down hill to have brakes but not lock the rear wheels .

I made some try ( needless to say it was quite fun without steering) and I guess I 'll need a rear dig too to counter motors stall in few situations. but as I used lipo pack and there will be a dedicated nimh pack for this rig the pressure on the front axle should change and reduce the rear stall .

[Reflection]

I don't see those little gears holding up in a super honestly. I've seen some builds with this same basic idea and they've always used a different way to mount the motors. Might try and build some skids around the motors to help the transition between the chassis,motor and diffs. They look like rock anchors to me.

[SilverRidge]

we'll know it soon : I just got my servo back and sold that awfull jeep body

[SilverRidge]

the steering is up , I changed the steering link for a 6mm squared solid rod without ball pivots cause It has tendency to turn around itself and lose when I turned right to left instead of steering.needless to say it's much better now even if the rod is a few mm lower than the diff case it doesn't seems to hang on the rocks too much







the fun thing is that even on the roof the tires still touch the ground , nice after a roll over.

now I'm a bit desperate of finding a body that " fit " that width .... maybe a 1:1 SSV? ??

[SilverRidge]

http://www.youtube.com/watch?v=jWcUUPU1AS4

[4xFord]

Where did you find that 1/5th Jeep Body?