Positional sensing
Positional sensing
(OP)
Please can someone provide a clue.
I need to monitor the position of a flag positioned on a leadscrew attached to a motor. All the movement is computer controlled and on startup moves the flag to break the beam of an opto sensor. The leadcrew is then activated and the flag moves until another opto sensor is activated (about 150mm). The problem is that the opto sensors are mounted on flimsy posts and can not be constrained in enough degrees of freedom.
Ideally I would like to use an alternative method and have been told about positional encoders, bar code readers etc - please can some genral help be provided to point me in the right direction.
Regards
Parsnip
![[morning] morning](https://www.tipmaster.com/images/morning.gif)
I need to monitor the position of a flag positioned on a leadscrew attached to a motor. All the movement is computer controlled and on startup moves the flag to break the beam of an opto sensor. The leadcrew is then activated and the flag moves until another opto sensor is activated (about 150mm). The problem is that the opto sensors are mounted on flimsy posts and can not be constrained in enough degrees of freedom.
Ideally I would like to use an alternative method and have been told about positional encoders, bar code readers etc - please can some genral help be provided to point me in the right direction.
Regards
Parsnip
![[morning] morning](https://www.tipmaster.com/images/morning.gif)





RE: Positional sensing
Use a so called "Absolute" encoder", this could be mounted either at the motor end or on the end of your leadscrew.
Look here: htt
Benta.
RE: Positional sensing
As an alternative limit switches may be mounted next to the leadscrew.
yours
RE: Positional sensing
RE: Positional sensing
Eng-Tips: Help for your job, not for your homework Read FAQ731-376
RE: Positional sensing
Heidenhain and Balluff are a couple of manufacturers to get you going - Heidenhain are arguably better known for their rotary encoders, Balluff for their linear types. Both very good.
http://www.heidenhain.com/
http://www.balluff.com
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I don't suffer from insanity. I enjoy it...
RE: Positional sensing
Thanks all once again
Parsnip
RE: Positional sensing
TTFN