5-54
Motor, Mechanical Axis System, Measuring Systems
MPH-02, MPB-02, MPD-02
DOK-INDRV*-MP*-02VRS**-FK01-EN-P
motor encoder:
internal encoder resolution = S-0-0116/S-0-0256
ext. encoder:
internal encoder resolution = S-0-0117/S-0-0257
auxiliary calculation and drive-internal limitation:
S-0-0256 = 2
30
* S-0-0116 / S-0-0278 <=2
n
,
n<=15 (integral!)
S-0-0257 = 2
30
* S-0-0117 / S-0-0278 <=2
n
; (load reference) n<=15 (integral!)
S-0-0257 = 2
30
* S-0-0117 / (S-0-0278 * c
vor_M
)
<=2
n
; (motor reference) n<=15
(integral!)
S-0-0116:
Feedback 1 resolution
S-0-0256:
Multiplication 1 (motor encoder)
S-0-0117:
Feedback 2 resolution
S-0-0257:
Multiplication 2 (optional encoder)
S-0-0278:
Maximum travel range (
±
travel range)
c
vor_M
:
infeed length/motor revolution
Fig. 5-70:
Internal encoder resolution for linear encoders
Note:
Internally the multiplication (S-0-0256 and S-0-0257) is
automatically determined taking S-0-0278 into consideration.
The value of the multiplication (S-0-0256 and S-0-0257) calculated
according to the formulas in "Internal encoder resolution for rotary
encoders" or "Internal encoder resolution for linear encoders"
characterizes the encoder dimensioning:
DC000015v01_en.FH7
value < 2
15
value > 2
15
Ideal encoder resolution over
the selected travel range!
Value of S-0-0116/S-0-0117 can be
- reduced (cycles, rotary encoder)
- increased (DPs, linear encoder)!
Value of S-0-0116/S-0-0117 can be
- increased (cycles, rotary encoder)
- reduced (DPs, linear encoder)!
check selected
number of cycles (rotary encoder)
or division period (linear encoder)
calculating
S-0-0256 or S-0-0257
value of
S-0-0256 or S-0-0257
value = 2
15
S-0-0116:
Feedback 1 resolution
S-0-0117:
Feedback 2 resolution
Fig. 5-71:
Checking the selected and determining the ideal resolution for
encoder 1 (or encoder 2)
Note:
The calculated value of S-0-0256 or S-0-0257 normally will
never exactly correspond to 2
15
(= 32768). With result values
≥
2
15
the conditions with regard to the possibilities of encoder
evaluation are ideal!
Internal Encoder Resolution,
Linear Encoders
Encoder Dimensioning
Courtesy
of
CMA/Flodyne/Hydradyne
▪
Motion
Control
▪
Hydraulic
▪
Pneumatic
▪
Electrical
▪
Mechanical
▪
(800)
426-5480
▪
www.cmafh.com