4

Encoding Characteristics

Encoding Characteristics over Recommended Operating Range and

Recommended Mounting Tolerances.

These characteristics do not include codewheel/codestrip contributions.

Units

Radial

microns

± 130

Tangential

microns

± 130

Gap

microns

50 – 250

Temperature

°C

15 – 45

O.R.

mm

18 – Linear

CPR

count

900 – Linear

Codewheel Slot/Spoke

ratio

0.9 – 1.1

Min.

Max.

Ipp

µA10

73

Ioffset

µA–4

+4

State Width Error

e

°

–40

+40

Pulse Width Error

e

°

–40

+40

Recommended Codewheel and Codestrip Characteristics

Parameter

Symbol

Min.

Max.

Units

Notes

Window/Bar Ratio

Ww/Wb

0.9

1.1

Window Length (Rotary)

Lw

1.80

2.30

mm

(0.071)

(0.091)

(inch)

Absolute Maximum Codewheel

Rc

Rop + 3.40

mm

Includes eccen–

Radius (Rotary)

(Rop + 0.134)

(inch)

tricity errors

Center of Post to Inside

W1

1.04

mm

Edge of Window

(0.041)

(inch)

Center of Post to Outside

W2

0.76

mm

Edge of Window

(0.030)

(inch)

Center of Post to Inside Edge

L

3.60

mm

of Codestrip

(0.142)

(inch)