Do Series, Ring Indexer
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Dial Index-Ring Type Description Sankyo's Do Series ring indexer features cast iron housings with a large stationary center bore. The center and outer rings can support stationary dials above or below the indexing dial. Since both inner and outer rings are the same housing, the rigidity is sustained. The thin housing makes a small footprint and designed as the foundation for a rotary assembly machine. Robots with other peripheral equipment are easily mounted to this versatile unit. A globoidal cam rotates Sankyo made needle bearing type cam followers. Optimizing the cam follower diameter inherently maximizes torque transfer and extends the life hours due to fewer rotations with increased surface contact. Indexing incremental stops range from 16 to 60 to support large diameter dials from 2250 to 7200 mm (7.3 to 23.5 feet). This allows plenty room for inspection stations between each subassembly. Multiple index periods offer continuous or on demand duty cycles with the indexing ring locking in position within 20 to 30 arc seconds during the dwell period. These versatile units index in both directions or oscillate. The Ro Series can perform nonpatterned motions with a continuous lead cam using servo driven motor or provide incremental stops less than 16. Most units are driven with geared motors that are within the height of the index unit housing or Sankyo’s R series worm reducer as shown. Timing cam packages are available with inexpensive photo beam sensors or proximity switches for wash down (IP67/NEMA-6/6P) applications. • 16 to 60 incremental output stops, 1-output stop equals 1-input shaft revolution promotes synchronization with peripheral equipment while running continuous duty cycles • Dial diameters range from 2250 to 7200 mm (7.3 to 23.5 feet) • 90° to 330° index periods with modified sine cam curves • Maximum 200 cycles per minute, bi-directional indexing, oscillating motions (non-patterned motions for the servo driven Ro series) • Accuracy – ±20 to 30 arcsec indexing and 20 to 30 arcsec repetitive • Painted cast iron housings are available in 7 standard sizes (25, 30, 35, 45, 55, 65 and 80) • Standard brushless dual voltage (230/460) gearmotors are UL & CE certified, optional R series reducers (as shown), brake motor or wash down configurations are available • Variable frequency drive controller utilizes electronic braking and variable speed for gearmotors in 115-1ph, 230-1/3ph, 460-3ph volts, 50/60 Hz, UL & CE certified • Stop/start frequency up to 60~90 per minute (output load/reducer dependant), clutch brake or servo drives are available • Standard IP50 photo eye timing cam sensor package supplies dial “in position” signal to stop the motor, IP67 proximity type optional Standard timing cams are plastic with IP50 photo eye sensors multiple sensor can interlock support machine crashes (IP67 proximity sensors optional) Variable frequency drives controllers use electronic braking to stop the index motor consistently even if the speed is changed. Multiple speed patterns can be used to jog for easy setup. E-stops can occur without tripping the output torque limiter clutch due to the soft stopping feature. Continuous duty cycles can be simulated while running cycle on demand by lengthening the dwell time since the speed can be changed on the fly with every cycle. Stop/start cycles per minute depend on the reducer backlash/life and the output load. 10655 State Route 47 • P. O. Box-4338 • Sidney, Ohio 45365-4338 Tel: (937) 498-4901 • Fax: (937) 498-9403 www.sankyoamerica.com • sales@sankyoamerica.com

Do/Ro Specifications Model Dial Diameter mm Hollow Bore Dia. mm (inch) Max. Axial Load N (lb) Max. Radial Load kg (lb) Shaft Center Dist. mm (in) INDEX HOUSING Output Type Indexing Stops Oscillating Angle Index Period Output Bending Moment Input Input Speed Input Bending Moment Index Accuracy Index Accuracy (2-dwell cam) Dial Index-Ring Type Quick Reference Chart 25Do 30Do REDUCER / MOTOR Output Clutch Torque Limiter Timing Cam Sensor Package VFD Controller VFD Features Standard flange with stationary hollow secondary flange, riser 16,18,20,24,30,32,36,40,48 & 60 stops in 1-dwell Only by...

AD/Alpha Series Dial Index Timing Sensor Package Option Cam indexing units are designed to perform one output index with a partial rotation of the input shaft. The partial rotation of the cam with the output turret rotating is referred as the index period. Rotation of the input shaft without the output turret rotation is referred as the dwell period. The ratio between the index and dwell periods is usually related to time. Index verses dwell periods can vary but the most common for continuous duty cycles are 1:3 ratio or one part index to 3 parts dwell periods. This is typically used for...

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