Re: hi help me out guys
- From: Sjouke Burry <burrynulnulfour@xxxxxxxxxxxxxxxxxx>
- Date: Mon, 13 Mar 2006 18:06:37 +0100
suchi_84@xxxxxxxxx wrote:
Hi folks,Its a two stage control loop ,for coarse movement it is
I need a help. As I am basically an electrical engineer I have
succeeded in micro-stepping a stepper motor by 128 micro steps of step
angle 1.8degrees which mean it can at one instance move by as small as
0.014degrees. Well the problem now is that I need to convert this
angular motion into its equivalent linear motion(i micron) so that I
get a micron level motion. As not many were able to help me out in this
regard, I started browsing the net for some way of achieving this
conversion.
I hit upon something on which I
need your help. In a compact disk there is a rack and pinion
arrangement which is capable of moving by 0.5micron (maybe, 0.05
micron...me not pretty sure). There is an optical arrangement of infra
red beam which runs on this rack and pinion and which is reflect on to
the ridges of a cd so as to store data in cd's. as the distance
between adjacent ridges of cd is in the order of 0.5 micron(or maybe
0.05 micron) so this rack and pinion must support such minute movement
of 1 micron that is required in my project,I feel. Cant this apparatus
satisfy my need? Respond as soon as possible friends
suchi
motor driven,for the accurate alignment something like a
loudspeaker coil and a photodetector in a feedback loop
are used in sideways and focus control, so the motor part
is not very accurate.
The motor part just tries to keep the coil more or less
in the centre position,while the coil does the tracking and
stepping.
.
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