PDA

View Full Version : VR adjusting pot


ongbenghui
2008.05.18, 07:17 AM
Hi,

Just curious, there is a VR adjust pot on the PCB on my MR-15.
What's that for ?

EMU
2008.05.18, 10:45 AM
Adjusts steering trim.

Marianitem
2008.06.16, 10:38 PM
Iīve seen old japanesse F1 boards that have a grey box with a hole on center and dip inside there is something similar to the pot adjustment screw. Also, on the other side of the board there is the regular steering pot screw.
What is that grey box thing?

herman
2008.06.17, 04:08 AM
Iīve seen old japanesse F1 boards that have a grey box with a hole on center and dip inside there is something similar to the pot adjustment screw.
i think it's for the radio range... but not sure as i could be wrong...
older boards have that... but newer ones don't...

Marianitem
2008.06.17, 09:10 AM
Oh, i see. So... i mustīt touch it? What do i set up from that thing? And the steering i should center it from the other side, from the regular screw?

herman
2008.06.17, 11:02 PM
So... i mustīt touch it? What do i set up from that thing? And the steering i should center it from the other side, from the regular screw?
suggest not to touch it as it might affect your operating range, as for steering, adjust the thingy in the picture... there's a hole in the chassis underneath the sticker that gives you direct access to that dial...
http://mini-zracer.com/forums/attachment.php?attachmentid=21493&d=1162861766

typed "steering centering" in the search function and got the following results....
http://mini-zracer.com/forums/showthread.php?t=23720&highlight=centering+steering
http://mini-zracer.com/forums/showthread.php?t=25615&highlight=centering+steering
http://mini-zracer.com/forums/showthread.php?t=25077&highlight=centering+steering
http://mini-zracer.com/forums/showthread.php?t=23992&highlight=centering+steering
http://mini-zracer.com/forums/showthread.php?t=23101&highlight=centering+steering
hope at least one of them helps....

franciscantony
2008.06.17, 11:36 PM
Sorry Marianitem, I don't know what that is for.
I would like to know that too.

herman, those links all mention the mr02.
we need this information for the older F1 chassis
which seems to be a bit different from the mr02
and also the latest f1 chassis.

thanks for the links anyway, was interesting reading.

-Francis

Marianitem
2008.06.18, 12:19 AM
Francis, this is what Herman says about this grey box:
"i think it's for the radio range... but not sure as i could be wrong...
older boards have that... but newer ones don't... "

Herman: Iīll not touch it as i donīt want to ruin a good working car. But anyway it would be good to know what this is. Might be useful someday.
If being the "radio range" thing, how does it work?

I already have this grey box in another PCB. Iīve been looking carefully and it is exactly the same as the Jordan F1 PCB. So i guess this another one should be a F1 PCB, and that older Japanesse PCBs for F1 have this thing.

herman
2008.06.18, 02:25 AM
http://mini-zracer.com/forums/attachment.php?attachmentid=19085&d=1138864864
the pic above is of an f-1 pcb... and is 'that do-dad' thingy you're pertaining to?
this i believe, as i mentioned is a range thing... you can experiment, by turning it in one direction in very small increments and see how your range increases, or decreases...

f-1 information.... (found it on a link from one of the links posted above)
http://mini-zracer.com/forums/showthread.php?t=20661&highlight=center+steering

post #7 from bda52
On the F1, take off the barrge board part of the body. When you look at the bottom side of the car there will be a hole in the clear chassis. That is where you stick the screwdriver through to make the adjustment to the steering pot. You will not need to remove the board from the car.
http://mini-zracer.com/forums/attachment.php?attachmentid=19091&d=1138901290

hope this helps....

Marianitem
2008.06.18, 08:22 AM
Even when i prefer to keep the chassis sealed, this little hole looks very helpful. Anyway i should add a little gum-tape to cover the hole, because dust will get into servo compartment.
As for the radio range, now i know enough not to touch it :P
Thx all of you.