Please need some robot advice?

14th May 2005, 18:48

Hello,

My name is Will and I have been building a remote-controlled robot. I was hoping someone could offer me some advice.

I am using a RFDR33 Vantec controller, two NPC DC motors for the wheels, a 36V battery, and am trying to control this using the Futaba 9CAP transmitter with the accompanying 8 channel receiver and battery. The distances that I am running from the parts to the speed controller are small, therefore I am using mainly 12 guage wire. My problem is I cant get the motors to move when using the Futaba R/C. I have tested and checked all my connections and I am getting power from the battery when I turn my power switch but as I said before, my motors dont move when I move my joysticks on the Futaba. I checked my motors and they move when powered directly but not when signalled through the speed controller.

Could there be some special programming I am not aware with the Futaba transmitter? Or maybe some other component? If anyone could offer me any suggestions , please respond. Thankx.

14th May 2005, 19:56

This may sound a bit stupid but is the vantec connected to the receiver, i.e. are the wires from the vantec (black, red and white) running to the receiver and if so are they in channel 1 and 2. Also does the receiver have power i.e. does it have its own rx battery or are you running a BEC.

14th May 2005, 22:06

Yes the vantec is connected to the receiver, they are in channel 1 and 2 and the receiver battery is connected in channel 3.

**robotic_ants** · 14th May 2005, 22:34

Are the transmitter and receiver batteries charged?

Chris - http://www.featherweights.org/forumBreak

**blazerbotics** · 14th May 2005, 22:58

check make sure your RX is working by plugging a servo in a spare channel, if that works then its a speedo wiring problem. Put a volt meter over the vantec connectors to make sure you have power there. Make sure your RX plugs on the vantec are in the RX the right way round as vantec plugs can be instered either way, plus the dont have the red wire on them.

14th May 2005, 23:58

The transmitter and receiver batteries are both charged. As far as the Receiver plugs on the vantec, I have already taken the red wire out of both of them. But I will check the Reciever by plugging a servo in one of the other channels to see if it working. Im pretty sure I have power to the vantec because I checked the power with a voltmeter earlier.

**julian** · 15th May 2005, 10:15

Victors dont work with most standard RC gear and require a booster to connect to the receiver. I spent 2 weeks trying out all sorts of things before discovering that on a Web page.

Certainly testing the receiver with a servo is an obvious way forward.

**blazerbotics** · 15th May 2005, 10:23

vantec dont neen a booster, they only use the negative and signal from the RX, they dont use the positive.

I picture or diagram of yor setup might help.

**julian** · 15th May 2005, 12:27

The problem with Victors is that they need a stronger signal than Sanyo receivers can give. The best option then is to use a mixer.

16th May 2005, 00:00

I dont have a picture of my setup but I have hooked it up like the Vantec manual shows on their website. I have the power cable from the battery to the power switch and the a fuse to the Vantec speed controller (1+), the motors hooked to the corresponding terminals (Ma1,etc.), and then the ground cable from the battery to the ground on the Vantec (G1). I did not use the BRK/Clutch coil terminal. And as I said before inputs 1 and 2 in channels 1,2 in the receiver and battery in 3. Almost all the wiring is 12 guage wire.

The Vantec url is http://www.robotcombat.com/marketplace_vantec.htmlhttp://www.robotcombat.com/marketplace_vantec.html

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