Maker Pro
Maker Pro

how many types of encoder there

Iam having doubts

how many types encoders are available and where it is used

what type of out put an encoder will give
please give the answer
 
G

Gary Tait

Jan 1, 1970
0
[email protected] wrote in @q19g2000prn.googlegroups.com:
Iam having doubts

how many types encoders are available and where it is used

what type of out put an encoder will give
please give the answer

It depends what you are encoding.
Is it one data form to another?

audio/video?

Some physical property?

It can be endless.
 
J

Jamie

Jan 1, 1970
0
Iam having doubts

how many types encoders are available and where it is used

what type of out put an encoder will give
please give the answer
Is this a pop quiz ?
How about an incremental type of encoder?, they
come in various forms.
A,B,Z/ A+,A- B+,B-, Z etc (Q Types)
then you have some that only has one output pulse.
A = main pulse, B or the Q signal is an offset from
A so that direction can be detected.

The +/- types give you more precise indexing with out the
higher speeds that would normally be required on a single output.
Z is the zero point..
In some systems, especially those that use the +/- with Z, the
equipment has an auto tune function to detect the PPR of the encoder
via the Z signal, and uses the +/- outputs in calculating the position
of the rotor of an AC motor for example, so that better tracking can be
had, when controlling the speed of an AC motor. Normally drives that
need this kind of tuning requires you to disconnect the motor shaft from
it's load so that the drive can properly calculate encoder's position
with the rotor so it can generate a consistent torque..

Then there's the Gray code types. those are parallel outputs and
used for Absolute positioning. They come in different output bit sizes
but in any of them, the whole idea is to make sure no 2 or more bits get
changed in their state at the same time other wise. This would cause
problems where 2 bits may not trigger properly at the same time, thus
giving you an erratic values whilst switching over to the next position.
The end results is a value that ranges from 0..16 for example, in a 4
bit type, in a complete turn.
etc..
 
Top