CC770-R RESOLVER TRANSDUCER



PATENT #5,272,927

 


GENERAL

The CC770 Resolver Transducer is used as a position feedback device where absolute measurement of screwdown position is required. The top hat configuration couples the resolver package directly to the mill screw eliminating backlash and gearing errors inherent in a screwdown mechanical system.

Both single and dual resolver versions are available. The dual resolver unit contains a fine resolver which is geared 64:1 to the coarse resolver enabling greatly increased accuracy and resolution. The CC770R contains no electronics! It is a rugged electrical device and should be transformer coupled to the control system to avoid any induced noise via control common. The resolver-to-digital electronics are mounted within the control system enclosure.

APPLICATIONS

The CC770R Resolver Transducer is designed for use as a positioning feedback device in mill duty environments. Among its features are:

1. Absolute Measurement - Retains exact position throughout a power shutdown.

2. Eliminates gearing errors in the mechanical system.

3. Long-line Transmissions capability - 1000 feet and greater.

4. Very high degree of noise rejection. Ratio type of signal transmission using a modulated carrier waveform.

The single resolver configuration will support conversion accuracy and resolution to a 12 bit number. The dual resolver configuration will support conversion accuracy and resolution to a 21 bit number.

ELECTRICAL SPECIFICATIONS

Feedback Device Brushless resolver
Frequency Range 400 -10,000 Hz
Excitation Voltage (rotor) 7.5 VDC rms
Excitation Current (max) 40 mA rms
Output Voltage (stator) 8.0 VDC rms
Operating Temperature -55° to 125°
TRANSFORMATION
Ratio 1.067 +/- 5%
Accuracy +/-7min.of arc

MECHANICAL SPECIFICATIONS

Housing NEMA 13

Material: 6061 Anodized Aluminum

Seal O Ring

Fasteners 316 Stainless Steel
Shaft Size 0.4998" (+.0000,-0005)

316 Stainless steel

Keyway 1/8 " x 1/16

Shaft Seal Teflon Graphite
Bearing Life 2 x 108 revs at rated shaft loading
Shaft Torque 0.5 to 1.0 oz-in w/o seal

1.0 to 2.0 oz-in w/ seal

Shaft Runout 0.0005 T.I.R.
 

ORDERING INFORMATION

Example:

CC770R -

D -

1:3A -

LS2 -

1

1

2

3

4

CC770R = BASIC (Mill Duty) DESIGN

1 = RESOLVER CONFIGURATION

______________ S = Single

______________ D = Dual

2 = GEAR RATIO

Gear Down

______________ 2:1 to 9:1

______________ 10:1 to 39:1

______________ 40:1 to 99:1

Gear Up

______________ 1:1 to 1:7

______________ 1:8 to 1:24

______________ 1:25 to 1:99

3 = MECHANICAL LIMIT SWITCH

______________ "N" = Number of contacts (1, 2 or 3)

4 = SCREW PITCH

______________ "N" = Inches per turn

PRODUCT DIMENSIONS

Dimensions = Inches (mm)

  • 19.50(495) O.D. height dependent on screw travel

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