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View Full Version : MR03 PCB swap?


color01
2011.03.10, 08:49 AM
Hi guys and gals, quick question on board swapping... have any of you who swapped an MR03 PCB into your MR02's noticed any significant improvement in servo speed over the original 02 PCB? I have heard that it increases the voltage going to the servo motor, hence better servo speed on the 02 chassis. I ask because I just read about this servo with some pretty wonderful specs:

Link: JR DS287MG (http://www.servodatabase.com/servo/jr/ds287mg)

Judging on the specs and the servo's relatives (DS285/MG) I'm going to wager that this servo is geared for speed, which is exactly what I've been looking for all these years. If the 03 PCB can provide this servo with the voltage it needs to run, I think it might be the first commercial sub-micro servo to be able to replace the Mini-Z servo for real.

So, anybody have any impressions of the 02 -> 03 board swap? Maybe we've finally found the servo to complete the MRCG1.1... :)

Traveler
2011.03.10, 01:34 PM
PedroCamp has a new 03 board in for a FET job. He should be able to measure the voltage coming off to the servo if that would help.

To my knowledge, none of us at HSH have tried an 03 board in an 02, but many of us run 03 boards in our F1s. You may want to try Chad Nelson or DaveyG, both of whom have.

machgo5go
2011.03.10, 02:14 PM
All my MR02 & MA010 have swapped out with MR03 FETed Boards.
Of course throttle & steering responses are much more linear & stronger.
Steering have to pump up the Curves in which I assume to compensate for a non-coreless servo motor. It is a really worth upgrades which mainly to get instant reverse which we all know well & Hated on 02ASF board.

yasuji
2011.03.10, 10:10 PM
BRIAN... idk if it provides more voltage... an imo it is not quicker nor does it provide more steering using an 03 in a 02 chassis!
02 w 02 board steering travel in the radio was set to 70 % w 68 % balance
02 w 03 board steering travel in the radio is set to 90 % w 87 % balance
from what i see it has a finer resolution.... like 16 bit to 32 bit....:D
steering the wheel slow it is smoother than my 03
02 board makes it notchy
i have been using 03 boards in my 02 since i broke the servo gear in my 03...lol:rolleyes: and i will never go back!because of the advantage of REVERS! :D

lfisminiz
2011.03.10, 10:15 PM
BRIAN... idk if it provides more voltage... an imo it is not quicker mor does it provide more steering using an 03 in a 02 chassis!
02 w 02 board steering travel in the radio was set to 70 % w 68 % balance
02 w 03 board steering travel in the radio is set to 90 % w 87 % balance
from what i see it has a finer resolution.... like 16 bit to 32 bit....:D
steering the wheel slow it is smoother than my 03 02 board makes it notchy
i have been using 03 boards in my 02 since i broke the servo gear in my 03...lol:rolleyes: and i will never go back!because of the advantage of REVERS! :D

Grant, i would agree with you 100% on all of this. Pretty much what i thought since i switched all my cars to 03 boards (02s, AWD, F-1).:)

datsunking
2011.03.19, 11:29 AM
how do u guys swap a 03 board to a 02? is it hard?

datsunking
2011.05.20, 05:55 AM
link removed

Scrapper
2011.05.20, 10:37 AM
I have one 02 with 03 board, and one with 02 board, I notice that there is not a noticeable difference in steering in mod classes, in fact i feel smother witht he 02 board

datsunking
2011.05.22, 11:23 AM
I have one 02 with 03 board, and one with 02 board, I notice that there is not a noticeable difference in steering in mod classes, in fact i feel smother witht he 02 board

i just fited 03 board on my 02. Didn't had time to try on track yet... Hope it's not as bad...

datsunking
2011.05.25, 01:56 AM
Not sure it's it's the correct way...

http://a5.sphotos.ak.fbcdn.net/hphotos-ak-snc6/230228_10150204475323970_678363969_7270390_6652645 _n.jpg
off the rear
http://a7.sphotos.ak.fbcdn.net/hphotos-ak-snc6/247070_10150204475463970_678363969_7270393_8122012 _n.jpg
AM VS ASF 03
http://a6.sphotos.ak.fbcdn.net/hphotos-ak-snc6/230905_10150204476703970_678363969_7270425_3125703 _n.jpg
Board sitting in but switch n servo motor can't fit
http://a4.sphotos.ak.fbcdn.net/hphotos-ak-snc6/250508_10150204476908970_678363969_7270430_5924814 _n.jpg
soldering old motor wires in to 03 board
http://a7.sphotos.ak.fbcdn.net/hphotos-ak-ash4/226648_10150204477138970_678363969_7270436_7480153 _n.jpg
Soldering the old switch to 03 board
http://a7.sphotos.ak.fbcdn.net/hphotos-ak-ash4/229387_10150204477413970_678363969_7270443_251028_ n.jpg
It's in!!!!
http://a2.sphotos.ak.fbcdn.net/hphotos-ak-ash4/248749_10150204477533970_678363969_7270446_1702705 _n.jpg
oppps my drill bit was too big!!!!
http://a1.sphotos.ak.fbcdn.net/hphotos-ak-snc6/230161_10150204477618970_678363969_7270449_2059459 _n.jpg
My noob way of having 03 board on 02 mod

hrdrvr
2011.05.25, 08:51 AM
Looks good to me. :D

datsunking
2011.05.25, 10:17 AM
Looks good to me. :D

Thanks... Initially had a hard time driving it. But after some settings on the controller & solving some errors on my a-arm with the help of few friends. The car was superb... Car was faster, steering response better. Reverse way much faster!!!!!!!

delrosa81
2011.06.17, 11:12 PM
Thanks... Initially had a hard time driving it. But after some settings on the controller & solving some errors on my a-arm with the help of few friends. The car was superb... Car was faster, steering response better. Reverse way much faster!!!!!!!

Yeah man! test drove ur car and it is superb! :) Look forward to our next track outing!