PDA

View Full Version : hellllllp



padlbotr
09-03-2015, 12:15 AM
hi , i'm new to everything you folks talk about. i hope someone can help in a way i can understand.(non tech non math etc)
straight up hack wd b fine!! here's the problem:

i am converting my 35 yr old pontoon boat into a paddlewheeler. i have just bought a JAZZY SELECT wheelchair to power my wheel. i'm using the seat (with the upgrade controller), batteries(new), and the onboard computer. the problem is that i would prefer to use 1 motor for my drive and keep the other for a spare. this is a problem for the computer which sees a motor fault and will not run. the question: is there a hack to allow the computer to function with only one motor attached? any help appreciated ....thanx

jwatte
09-03-2015, 05:23 PM
I don't know of a hack to make the Jazzy controller believe two motors are OK.
You could replace it with another controller.
The Jazzy Select 6 is rated at 12V / 40A: http://www.pridemobility.com/jazzy/jazzyselect6.asp
If that's the model you have, then a controller like this might work: http://www.ionmc.com/RoboClaw-HV-2x60A-Motor-Controller-60VDC_p_12.html
You can hook up analog joysticks (or a R/C car remote control, or an Arduino) to this controller and make it go. You can drive just one motor with this controller.

Regarding how to water-proof your set-up, I don't have any good ideas, though :-)

padlbotr
09-03-2015, 06:06 PM
I don't know of a hack to make the Jazzy controller believe two motors are OK.
You could replace it with another controller.
The Jazzy Select 6 is rated at 12V / 40A: http://www.pridemobility.com/jazzy/jazzyselect6.asp
If that's the model you have, then a controller like this might work: http://www.ionmc.com/RoboClaw-HV-2x60A-Motor-Controller-60VDC_p_12.html
You can hook up analog joysticks (or a R/C car remote control, or an Arduino) to this controller and make it go. You can drive just one motor with this controller.

Regarding how to water-proof your set-up, I don't have any good ideas, though :-)

just spoke to a motor repair expert who was not a computer guy, and his thought was a jumper with a resistor across the power output of the computer.........any thoughts?????????? btw it's a 24v system 12v for brakes 24v for motor

padlbotr
09-04-2015, 10:55 AM
output of the computer is 12v for brakes and 24v for motor. had a thought , and checked with a motor expert ( who did not have computer knowledge on this machine) : what about a resistor = to the motor load, jumped across the outputs? thanx

jwatte
09-04-2015, 01:19 PM
That may work, or might not, depending on the specifics of the controller.

I'd use a fairly high ohm resistor -- in the 100 ohm to 1000 ohm range -- to avoid burning too much power (and needing a very high-power resistor.) Then again, the controller may not like that.

With 24V and a 100 ohm resistor, you'll get 240 mA, which ends up being 24W, so a 25W resistor/heating element would be about right. WIth 1000 ohm, you'll get 24 mA, which ends up being 2.4W, so a 3W or 5W resistor will be sufficient (and cheaper.) Depends on what the controller "wants" to see.
Here's one you can try: http://www.digikey.com/product-detail/en/FVTS05R2E1K000JE/FVTS5-1.0K-ND/257679

Note that the resistors will get hot!

The RoboClaw controller can do 24V as well as 12V, btw, if you want to go that way in the end.