Endless Sphere

The 3 phase wires from the controller need to fire the motor phase wires in the correct order, otherwise you'll have either nothing like you have, or you'll have some weird buzzing or jerking when you apply power. KT has sensored and sensorless controllers, so depending on which you have you may hav...

The white wire from the MAC supplies a speed signal only under power. When coasting it will go to -0-

It needs an external speed sensor to register speed full time. Mine did anyway (MAC 12t)

I have a MAC 12t running on a 35a KT controller. I consider it a great setup! The KT "imitation torque control" is chinglish for "power based" cadence system that's a joy to ride! The white wire coming from the motor is the speed sensor - but it's useless as there's no signal unl...

Eunorau used to sell a MAC (12T AIR), but it's not on their site now. They have brushless, geared, cassette motors (500w) listed, but don't specify the "T". Why isn't the MAC readily available? They still have this one showing (MAC 8t), but it appears to be part of a bundle - and that bun...

I'm betting non-event. The 500w Bafangs are pretty peppy little motors. Especially when the rider is 155 lbs. My advice would be to install a display that offers a decent watt meter that reads in real time. Keep that in check, and you'll have about the best assurance available that you aren't going ...

I've seen there's just not a lot of info out there as well. The display and the controller do have to know how to talk with each other. Even if they have compatible plugs, there's NO assurance that they can do that. Have a look here- https://electricbikereview.com/forums/threads/radrunner-lcd-displa...

tazman6518 wrote: ↑

Feb 19 2021 7:28pm

No. Just wondered if i could use a KT as they are easier to understand and use.

KT displays only work on KT controllers. No ifs....

You might have a better shot at something used with a Bafang, though I have no information.

Here's a thought. I absolutely LOVE my MAC 12t for my application. Unfortunately they seem to have disappeared on the market for some weird reason. My question is, would there be any way to install a clutch in a GMAC motor to take advantage of the design changes (torque arm and cable exit location)?...

I have a 3 year old 14.5ah battery from RAD (nothing special about it), on a bike that's ridden pretty much daily (3-10 miles on average). It's powering a 35a KT controller that's powering a 1000w+ MAC 12t geared hub motor. There is no sign of a loss of range, capacity, or extended charge times to d...

Plans for which controller you're going to use yet? I would likely go with the 35a KT, but that's because I'm familiar with it, and it's working so well with my MAC 12t build. Nothing special.....only looking for basic throttle features w/o display. Sinewave not a concern with this build. At the mo...

Watching with interest! I'm aware of the motor's existence, but have seen no user reports. Wondering if they've gone with steel gears like they did with the mid drives? Plans for which controller you're going to use yet? I would likely go with the 35a KT, but that's because I'm familiar with it, and...

Regarding the un-commanded cruise engagement, I've seen that as well, but my cruise is set to on. If yours is set to off and you're still getting it, seems like there are a couple of short leads coming from the controller that must be connected together to allow the cruise. Maybe revisit your wiring...

If/when you see an M620 (Ultra) rated at 750w, it's usually with a wink towards being a legal US import. Bafang sets the max amps in the controller at 30a - making it closer to 1500w. As far as range is concerned, what to expect, many of these are used with 26"x4" tires because of all the ...

Well, that's a relief....

Please let us know if your motor has a clutch.

You don't seem to care for many of the answers/advice you are getting here. Why is it that you are not working this problem out with the people who sold you this motor?

Ok, I see what you are talking about now. You've charted both sets of figures (Mike's and Bafang's) to see what they look like on a graph. Interesting!

I have to ask though, where are you getting the mV values you are using on the graph?

2 thoughts. First, it's not hard to improve on the standard Bafang settings with your own preferences in mind. Second, keep in mind we are all going to have our own set of 'druthers when it comes to the Ultra, or any of the BBSxx series for that matter. There is not going to be a generic set of para...

That smaller section of the crank arm would be missing if I needed a little more room.

Regarding "awkward stopgap solutions" I would just like to share that the Bafang mid drives, including the newest Ultra, use that same "awkward stopgap solution" that you will likely be using on your new ride. Point being, it's only an "awkward stopgap solution" if YOU...

That's what I did for my MAC 12t install. Sensor output goes where the white wire from the motor is now. Original white wire from the motor no longer used. Picked up my 5v and ground for the wheel sensor from the PAS sensor. Wheel sensor pretty cheap, and just took a few minutes to install. What wh...

So is a wheel magnet and sensor too crude of a solution? Sent from my iPhone using Tapatalk That's what I did for my MAC 12t install. Sensor output goes where the white wire from the motor is now. Original white wire from the motor no longer used. Picked up my 5v and ground for the wheel sensor fro...

I would encourage you to consider how you are going to stop a bike going 25mph reliably, in year around weather conditions.

Myself, I would not consider a bike that didn't have disc brakes.

OK, I get it now. We are playing on vastly different levels. My level is more along the lines of production bikes using commonly seen production components (including batteries). When you start talking megawatt powered Leaf (DD) motors many or most will never even see, let alone ride, you might want...

tomjasz wrote: ↑

Nov 08 2020 3:08pm

AHicks wrote: ↑

Nov 05 2020 10:56am

Surprised nobody has mentioned the MAC and GMAC geared hubs? They are just about the strongest available.

Outside of ES dot com "Cutler" MAC is little known.
Cutler MAC

Thanks Thomas. As a relative newbie, I didn't know that (among other things!).

Variable regen is a controller feature that works with any motor that can do regen. The GMAC is not any more/less complex to deal with than a DD. This needs to be put in a little better context, don't you think? For starters, a DD regen will work just fine with a pretty simple/inexpensive controlle...