[chbot] slow motor

[GRAHAM CHRISTIE]

Hi Robin

If you had the drill driving a small diameter shaft and rope,(I use 3mm for boats all the time Oborns Nautical or Burnsco)https://obornsnautical.co.nz/products/dyneema-double-braid-3mm?_pos=2&_sid=d79ef86f6&_ss=r https://obornsnautical.co.nz/products/dyneema-double-braid-3mm?_pos=2&_sid=d79ef86f6&_ss=r

And then run this through a pulley system, 2:1 or 3:1 or 4:1 just depending on how much you want to slow it down and increase the pulling force.

I have done this in the past with a closed loop rope system so that you can drive it and pull in both directions.

I personally use the little marine pulleys, but for cost pulleys can be made from just about anything.

Regards

Graham


> On 17 November 2021 at 19:10 Andrew Errington <erringtona at gmail.com> wrote:
> 
>     Depending on which part of the original motor assembly died could you combine the electric drill motor with the worm gearbox?
> 
>     If it's going too fast could you put a PWM speed controller on it?
> 
>     Andrew
> 
>     On Wed, 17 Nov 2021, 18:29 Robin Gilks, < gb7ipd at gmail.com mailto:gb7ipd at gmail.com > wrote:
> 
>         > >         Greetings all
> > 
> >         I've followed up the suggestion of using a cordless drill for my low speed motor to substitute for a wiper motor..
> > 
> >         Investigation of 9.6, 12 and 18v drills that have gone the way of nicad batteries have shown me that they all spin way too fast and have nothing like the torque of a wiper motor. 
> >         This is mostly due to the gearbox rather than worm drive the wiper motor has. The added advantage of the worm drive is that it can't (easily) be driven from the output side so no brake is required.
> > 
> >         So back to Monday night's question, does anyone have a wiper motor going spare? Permanent magnet (i.e. reversible) with a simple shaft out rather than an internal cam or crank..
> > 
> >         Cheers
> > 
> >         --
> >         Robin Gilks
> > 
> >         _______________________________________________
> >         Chchrobotics mailing list Chchrobotics at lists.ourshack.com mailto:Chchrobotics at lists.ourshack.com
> >         https://lists.ourshack.com/mailman/listinfo/chchrobotics
> >         Mail Archives: http://lists.ourshack.com/pipermail/chchrobotics/
> >         Meetings usually 3rd Monday each month. See http://kiwibots.org for venue, directions and dates.
> >         When replying, please edit your Subject line to reflect new subjects.
> > 
> >     >     _______________________________________________
>     Chchrobotics mailing list Chchrobotics at lists.ourshack.com
>     https://lists.ourshack.com/mailman/listinfo/chchrobotics
>     Mail Archives: http://lists.ourshack.com/pipermail/chchrobotics/
>     Meetings usually 3rd Monday each month. See http://kiwibots.org for venue, directions and dates.
>     When replying, please edit your Subject line to reflect new subjects.
> 
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.ourshack.com/pipermail/chchrobotics/attachments/20211117/9fa7aa8c/attachment.html>