ph2t
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betty, was reading at xmodworld and got this tidbit of info:
Quote:In case you get confused with the reason to modify the Xmods Servo:
the little series motor of the Xmods servo works pretty slow with the iWaver PCB. reason? No Idea, I was told so. So microsash just tested some similar motors and chose a 1,6 Bit-Charg. More powerful Bit motors are not needed.So it looks like once you’ve converted the xmod to use the iwaver PCB you need to change the motor in the servo to a BCG 1.6.
Here’s a link to the thread:
http://www.xmodworld.com/modules.php?name=Forums&file=viewtopic&t=8033&postdays=0&postorder=asc&start=0ph2t.
well, I just went and spent more $$$$…
I’m gonna do two rigs. One 4 cell, and one li-ion, just for the templestowe track….
cool!
ph2t.
lol, good to see you around still mate…it never stops, :smiley2:…
@chino, we’re just lucky here chino. so many like minded idiots way too close to each other…ph2t.
you sydney bastards have come a long way…:approve:
excellent stuff! all of it!
ph2t.
yeah, I’m gonna stay with the ball diff for now…. Next thing is to get the motor upgrade set for those bigger pinions….
ph2t.
sounds good mate….
cool track fellas, how long does it take to setup?
works well, I did it last night using two 8.2K surface mount resistors. you also need to shave the tie rod down in the area’s shown on ikinari’s page.
also you should shave 1-2mm off the servo thingy, when fully turned to the right, the white thing hits the diff…
cheers,
ph2t.
happy birthday d1ckhead…..:smiley2:
ph2t.
another reason behind the difference in torque between the two PCB’s is that the frequency of the PWM speed controll on the iWaver PCB is prolly higher than that of the RS PCB. This leads to a higher amount of power being transferred into the motor. Hence why higher speed ESC’s are known as more efficient devices…. this efficiency in energy translates to increased torque….
ph2t.
cool stuff man, can’t wait to see it.
I’ve rebuilt my xmod again, cleaned everything, replaced the bb’s with the new VXD set, so far so good. I’ve now completed the steering mod as well and it’s al looking promising.
man, you can sit down and waste hours just fine tuning the xmod chassis. It makes the biggest difference when you can really minimise the drive train losses in the car…. that’s why I want an all alloy rear and front setup, lol…..
ph2t.
chino, there’s a sh1tload of resources on the subject man, trust me….
http://bitpimps.lixlink.com/pages/phpForum/viewtopic.php?t=1778
and
http://www.bitmod.de/elektronikmods.htm#mosfets
prolly the best two links on the subject..
ph2t.
slut!
ya no smoke, but not the highest amount of torque either…. .BUT nelly will change that! 🙂
ph2t.
serious modding is required to make the bastards fast…. even though we are both yellow shells, the shear power of betty’s is evident over my stock fet setup.
man, if it was a z Iwould of busted a h-plate and a least two sets of servo gears by now…..
xmods are tough, there’s no doubting that….
just can’t wait to chuck a nelly in mine and leave betty in mah dust!!! haha….
ph2t.
love the idea for the rear rims, good stuff!
chino, check out my website in my signature, everything you need to know about nelly is there….
cheers,
ph2t.
chino, as usual your work kick’s major butt man! 😀
what have you done to the bevel pinion, how many turns does it equate to now??
love the rear fatties, they from the camaro or mustang????
ph2t.
yes tha plasmas are the strongest ferrite magnets I’ve found so far. for > 4 cells they are a treat…..
and yes that’s what I’m using as I sorta pointed out a few posts earlier in this thread. so charlie you kinda sorta stepped in that one. had you phrased your original question as you just stated above Jamie prolly wouldn’t of come down on you like that.
ph2t.
yeah, the performance is even more noticeable in the xmod where raw torque contributes the most to performance.
those powertechs are shit, the GP’s from rcmart are much better than those……
bithead can score batteries, good ones too….. Check out his “look at this shit I’ve scored off the back of a truck” thread…..
ph2t.
Quote:Cool – Whats the max voltage they are designed to handle?limited mainly due to the PCB restrictions of the iwaver, mini-z, & xmod….so no more than 6-7 cells or 2 lion/lipo.
Nelly deluxe has the 5V regulator circuit on it if you want to go higher…..bah!
ph2t.
Edited by – ph2t on 09 October 2004 15:12:39
I’ve stopped soldering to the commutator tabs now. I just pre-strip the enamled wire and loom it through. I then push down on the tap to seal it in place. Much better than soldering and also reduces any irregularities they may cause the motor to become off-balanced….
here’s some pics…
:approve:
ph2t.
Nelly v1.3 UPDATE
Well it’s official. I’ve now finished protyping and testing for nelly v1.3. I tell ya, I’ve leared A LOT about this stuff since the last revision of Nelly and I gotta say that if it wasn’t for the feedback from some great clients I might of never of made such progress.
I’ll post some pics soon. Unfortunately one of my design goals with v1.3 didn’t come through. I wanted v1.3 to be (apart from other things) smaller than nelly v1.2. Due to the recent findings though on how MOSFETS are driven by the kyosho/iwaver and now XMOD circuits, the extra circuitry added to account for this has made nelly v1.3 wider than its predecessor.
But hey, them’s the breaks…..
Doing some theoretical calculations and comparisons between Nelly v1.3, Si4562 mosfets and the old faithfull IRF7389 shows the following results.
Nelly v1.3 is more efficient than a 2×24 stack of IRF7389 mosfets.
Nelly v1.3 is more efficient than a 2×8 stack of Si4562 mosfets.
Due to the mosfet driver techonology, the more voltage you add, the more efficient Nelly v1.3 gets…….
ph2t.
Edited by – ph2t on 09 October 2004 14:26:44
lol, you’re not giving much away are you? lol….
makes sense about the heat transfer. But I’ve found since using the plasma type can there’s a lot less heat in comparison to the closed type bb can. Must be ’cause the commutator is “outside” the metal can, helping it dissipate heat.
ph2t.
how do you get the bb’s in the endbell? the spce left over from the bushings is bigger than your regular motor bb’s. what do you do to fit ’em?
I assume the process of putting shims behind the magnets pushes the magnets closer and increases the magnetic field for the armature to then get its drive from?
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