can I get reverse ?

[wattsup]

Hi, it,s been a while since i,ve been here, due to medical problems. since learning to walk again, it,s time to ride again. I have had a trike made for me, a Newton c21. managing to ride this, I have decided to put all the gear from my other bike into the trike, which has 2 wheels at the front and the drive wheel at the back....easy .  How can I wire up reverse... if possible, for my Magic Pie 1,48v,  with remote speed control.

[Bikemad]

Sorry to hear about your medical problems, but it's good to see you back again.

The reverse function was not available on some of the original Pies, but is was pre-wired to the red switch on the throttle on some.
It might be worth connecting the unused yellow wire to ground and see if it reverses the direction of the motor:
 


Check out this post for more information.

I'm not quite sure how the remote speed control needs to operate but it could be simply achieved by connecting an additional twist or thumb throttle in place of the 5K potentiometer shown here:



If it's the maximum speed you need to control, this can be achieved a shown here:



Alan
 

[wattsup]

Thanks much.  at present I,m using the red switch on the throttle as a safety switch...pressed on and motor will not work if throttle twist grip is moved..ie. when pushing bike around when it,s live.

[wattsup]

hi, been a while since I posted and saw your reply Bikemad. it would be great to get reverse if I could. there have been times it would have proved useful. how do you know its the yellow wire...  could I tap into the loom by the throttle and run the yellow to earth via an on/off/on switch, mounted on the handlebars. if yes, any chance of drawing a diagram. regards, john.

[Bikemad]

The wire I was talking about is the yellow one in the main harness not the yellow one in the throttle cable.

On my original Magic Pie, which was purchased on the day the Magic Pies were first released, the yellow wire on the motor harness was not physically connected to anything inside the hub, which is why I have labelled it as "Not Used" on the above wiring diagram which I produced after carefully studying all the connections on my original MKI Magic Pie.

Some later MKI Pies were produced with the yellow wire connected to the reverse terminal on the controller, and the yellow wire could be used to activate reverse by connecting it to one of the common ground connections.

If you locate the spare yellow wire coming from the main harness and simply touch it against one of the many black wire connections on the main harness, if you're lucky your motor will run backwards.

If it doesn't run backwards, then there is no easy way to operate reverse, but if it does work, all you need to do is connect the yellow wire to one side of a simple toggle switch and connect a wire between one of the black wire connectors and the other side of the switch.
Flicking the switch would then change the direction of the motor.

Alan
 

[wattsup]

Hi,Alan,  all sorted and so easily. I removed my controller and took off the tape covering the connections...in my face was an unused connector marked REVERSE. I did not realise this connector was there. the wires to it are dark blue  and black. I bridged across the connections with some wire and I now have a trike capable, of reverse. [ properly when I fit a switch ].

[Bikemad]

I'm glad to hear you that you have been able to make it work but I'm a bit puzzled as to why you had to remove the controller.

If yours is a MKI pie it should have the controller hidden inside the hubmotor, so I'm wondering what part you removed to find the connector marked REVERSE?

Alan

[wattsup]

to be truthfull, I don't think I ever said it was a mk1. I should have mentioned that it has a remote esc, that can be programed via a pc.  the esc is in a cast ali box. I haven't a clue what mk. this may be.  when I set the esc parameters, I enabled reverse in preparation that I might be able to get it, for the trike.  when I first received all the kit to do my 2 wheeled bike, I removed some of the naff looking connectors supplied and directly soldered them, and then taped over all of them.  of course I removed the tape yesterday and found the dedicated reverse one and thought hooray, I should be able to get reverse working, which I did.

[Bikemad]

to be truthfull, I don't think I ever said it was a mk1.  I should have mentioned that it has a remote esc, that can be programed via a pc.  the esc is in a cast ali box. I haven't a clue what mk. this may be.

I decided it must be a MKI after reading your initial post:

How can I wire up reverse... if possible, for my Magic Pie 1,48v,  with remote speed control.

You presumably meant that your Magic Pie has an external controller rather than what I had wrongly interpreted as a requirement of a "remote speed control" in addition to the requested reverse function.

There are three different versions of Magic Pies but if yours has an external controller it is most likely a MKII version.

GM did try an external controller modification for the MPIII, but I don't know if this was just a one off for their own test purposes or whether they were actually mass produced for customers:




Alan
 

[wattsup]

hi, alan, that controller is similar, if not the one I have. I must sorry about the confusion on my part. I really must think more about what I want to say before posting. my excuse is all the blasted tablets I am taking.  I must say a big thank you, to you, for all the help that you have given to me and all others on this forum.