Encoders best CPR

You only use the differential encoder if you use both the A A_ B and B_
By using A_ and B_ you are only providing half of the information, like using A and B only.
The use of the complementary information (A and A_ for example) is to provide better immunity for noise. If your system is not electrical noise active (for example if it does not have a VFD) then you do not need to use the complement, although it is recommended.

You cannot use B and B_ only, like you cannot use A and A_ only.
Wiring 0V first then 5V after or the way around makes no difference (I believe that you are wiring them with the power disconnected) !

greeder88 wrote: I an getting some weirdness with the scale factor.
I put three different encoders on my machine and scaled so I have .100 inch of travel per motor revolution which is what I require.
Encoder 1 has 250ppr and needs a scale factor of 10,000
Encoder 2 has 1000ppr and needs 40,000
Encoder 3 has 1024ppr and needs 20,480

Encoder 3 is only getting half the counts it should.
They are all the same BEI ABZC indexed encoders.
I can live with the lower count but does anyone know what happened?

Also a spare encoder is open collector not line driver. Is there a way to use it with a converter chip of some sort or should I get rid of it?

Bumped into this, to old but for the sake of having correct information.
Encoder 3 should be set at 40960, you had it at half so you where getting half the counts.