This is bit off - topic but I thought Id come here and try an way to see if any one can help with an idea I have to try to give myself some mobility by using my e-walker with a motor.
I want to be able to use this motor for rougher terrain, inclines or just for whenever i need it but also with freewheel , so that I can use manually ( freewheel ) or with the assist.
My question is whether there are any controllers currently being used by folk here that would allow me to achieve these slow mobility speeds ( 1- 4 mph ) with a drill motor ( i.e. 18 / 24 v dewalt ) and gear ratio 1: 80 - or at least no bigger than 88 tooth sprocket ( unless i change my wheels )
The Specs for my kneewalker are as follows.
( 7.5 / 8 " wheel diameter , 29lbs knee walker and about 175 or 80 lbs of raw flesh i.e. me, )
Ideally Id rather have controller i did not have to programme unless it was unavoidable or cheap ( not over grand like some )
Woops, sorry about my last question, I can see these are brushed - in fact its pretty obvious .
I havent actually decided on motor yet because Ive been trying to find one that can freewheel and gearbox which has been a little akward given the weight , would this controller avoid the need of trying to find motor with gear reduction already on it such as 24 Volt 250 Watt Electric Bicycle Gear Motor shown here electricscooterparts.com/MOT-24250G.htm , or are there any other other sorts of motors youd specifically recommend ?
hello again , I realise its been a wee while since my last post but I ran into quite few hitches with my project , that left me with $700 being stolen , amongst other things .
Looking back at your original post since then I was wondering what your thoughts where on this motor Ive foundhere ?
Not sure what the MCC is , I cant find any reference to the amps anywhere ,but Im assuming it cant be over 5 ?
The person whom suggested the Johnson to me thought I could probably get the sort of speed I needed for assistance if I used 80:1 ratio with a combination of gears and a controller, though TBH I was hoping I could also increase the speed , so at leastI could use it in emergency too if I was unable walk too.
Im assuming most of those analog controller listed at 24volts on that link would work fine with a 24v 100 or 120 watt motor only drawing 4 or 6 amps max ,or are there other factors I should be aware of ?
Are you talking about this 12v motor that can do that ?
One thing that bothers me a bit ( perhaps this is a problem in all small motors ) is the noise like shown here ( assuming its the same ) just because i see it being a problem in public places around other folk.
I can get 12v 10ah x2 custom done here at reasonable price ( unless they’ve gone up )
what sort of speed / battery efficiency where you basing your calculations on ( if im using pings batteries id like to try to use only 60/70 % ) ?
Am I right in assuming that the process involved in setting up one of these controllers is the same as one shown in these videos , and how would using an analog input change that ?
Ah, ok so it would be lot like what you see on most mobility scooters for speed control.
One thing that I noticed from reading data sheet for the Motor Mind C is how the voltage drop causes the motor go in reverse if it drops beyond certain point ( 2.5 v ) , is this a problem at all if the battery start to lose capacity , or does that 200ms it talks about being present take care of it so it can turn off ?
Also , im slightly curious given the pressure , rotation sensors if it would be possible to set up some sort of loop where the motor created variable speeds in response to my own speed i.e. if I was walking less than my usual pace / and need assistance so it was sync to each step - basically so its more adaptable to my own varying movement rather than me trying to turn the knob to adjust to my speed.
So if I was to use the above controller what other components would I need to use with the potentiometer ( I notice it says for use with this kit) but is that a requirement or just something recommended , if so are their cheaper options ?
I had been looking at controllers that operate between 6- 24 v , as 24 v was the max size of motor I wanted use ( single ),though I got no idea what the cc is as no stall current is mentioned. ( im guessing round 300 ) which means Id need at least 75 x 2 - 150 amp controller for single motor , and the closest I can see like this is only for dual
It says the cim has 133 stall current which would leave me with 33.25 amps continous current ( im using 25% rule to find the cc as suggested on the site ) so based on that would I be ok with a controllerlike this that used 60 amps,or is that cutting too fine ?
