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Date: Sun, 14 Oct 2012 13:38:36 +0100
Message-ID: <CAMgn=GMb+rSOQK-U=wW1Cm7PTMDLosZKw-vKDcud9KAhD4g...@mail.gmail.com>
Subject: Re: [brighton-hacker-space] Cheap steppers, cheap servos. Arduino workshop.
From: Justin Nel <dogbertuk2...@gmail.com>
To: brightonhackerspace@googlegroups.com
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You get two types of Steppers, Bi-Polar and Unipolar, both would need
different circuitry to operate (Bi-Polar requires a H-Bridge while a
Unipolar only regulars high and low being sent in sequence). I haven't
worked with the control boards as I've built my own, so I am not sure if
they offer an interface to remove the complication of two stepper types.
If you want cheap steppers, get ahold of old dead printers, I found two
beautiful steppers (and a nice DC motor) inside one old printer. Chris and
I were going to tear apart a load of printers to fill up the BB supplies
with these bits, but unfortunately were unable to get a hold of enough
printers so have moved onto other projects.
How many 360 servos are you after? I have a load which I'd be willing to
sell on.
- Justin
On Sun, Oct 14, 2012 at 1:11 PM, Mike Pountney <Mike.Pount...@gmail.com>wrote:
>
> Hey all,
>
> We're currently working with Brighton Uni and DreamThinkSpeak on a project
> that could hopefully gain an awful lot of exposure for the space -
> essentially helping build a robot army for a theatrical production.
>
> As part of this, I'm going to be running an Arduino coding workshop for
> the students that will be involved. This is pencilled to be at the space on
> Sat 3rd November - would anyone be interested in helping out?
>
> The project is going to involve motion, so I'd like to be able to include
> a stepper motor and servo element to the course, but tbh I'm rubbish with
> this side. I'm going to gen up on it, but for now really need some advice
> on what the uni should buy for the students:
>
> * Cheap servo, ideally able to lift a small amount.
> * Cheap servo, convertable to 360deg
> * Cheap stepper motor.
>
> Am I right in thinking that driving a stepper is the same principle no
> matter what the size? Eg, if we get some of these:
>
>
> http://www.ebay.co.uk/itm/120952642935?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1439.l2649
>
> ... will the same code transfer across to bigger ones?
>
> Thanks,
>
> Mike
>
>
> --
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Content-Type: text/html; charset=ISO-8859-1
Content-Transfer-Encoding: quoted-printable
You get two types of Steppers, Bi-Polar and Unipolar, both would need diffe=
rent circuitry to operate (Bi-Polar requires a H-Bridge while a Unipolar on=
ly regulars high and low being sent in sequence). I haven't worked with=
the control boards as I've built my own, so I am not sure if they offe=
r an interface to remove the complication of two stepper types.<div>
If you want cheap steppers, get ahold of old dead printers, I found two bea=
utiful steppers (and a nice DC motor) inside one old printer. Chris and I w=
ere going to tear apart a load of printers to fill up the BB supplies with =
these bits, but unfortunately were unable to get a hold of enough printers =
so have moved onto other projects.<br>
<div><br></div><div>How many 360 servos are you after? I have a load which =
I'd be willing to sell on.</div><div><br></div><div><br></div><div>- Ju=
stin<br><br><div class=3D"gmail_quote">On Sun, Oct 14, 2012 at 1:11 PM, Mik=
e Pountney <span dir=3D"ltr"><<a href=3D"mailto:Mike.Pount...@gmail.com"=
target=3D"_blank">Mike.Pount...@gmail.com</a>></span> wrote:<br>
<blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1p=
x #ccc solid;padding-left:1ex"><div style=3D"word-wrap:break-word"><div><br=
></div><div>Hey all,</div><div><br></div><div>We're currently working w=
ith Brighton Uni and DreamThinkSpeak on a project that could hopefully gain=
an awful lot of exposure for the space - essentially helping build a robot=
army for a theatrical production.</div>
<div><br></div><div>As part of this, I'm going to be running an Arduino=
coding workshop for the students that will be involved. This is pencilled =
to be at the space on Sat 3rd November - would anyone be interested in help=
ing out?=A0</div>
<div><br></div><div>The project is going to involve motion, so I'd like=
to be able to include a stepper motor and servo element to the course, but=
tbh I'm rubbish with this side. I'm going to gen up on it, but for=
now really need some advice on what the uni should buy for the students:</=
div>
<div><br></div><div>* Cheap servo, ideally able to lift a small amount.</di=
v><div>* Cheap servo, convertable to 360deg</div><div>* Cheap stepper motor=
.</div><div><br></div><div>Am I right in thinking that driving a stepper is=
the same principle no matter what the size? Eg, if we get some of these:</=
div>
<div><br></div><div><a href=3D"http://www.ebay.co.uk/itm/120952642935?ssPag=
eName=3DSTRK:MEWNX:IT&_trksid=3Dp3984.m1439.l2649" target=3D"_blank">ht=
tp://www.ebay.co.uk/itm/120952642935?ssPageName=3DSTRK:MEWNX:IT&_trksid=
=3Dp3984.m1439.l2649</a></div>
<div><br></div><div>... will the same code transfer across to bigger ones?<=
/div><div><br></div><div>Thanks,</div><div><br></div><div>Mike</div><span c=
lass=3D"HOEnZb"><font color=3D"#888888"><div><br></div><div><br></div></fon=
t></span></div>
<span class=3D"HOEnZb"><font color=3D"#888888">
<p></p>
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=A0<br>
=A0<br>
</font></span></blockquote></div><br></div></div>
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Message from discussion Cheap steppers, cheap servos. Arduino workshop.
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