catalogue search
P. 01
P. 02
P. 03
P. 04
P. 05
P. 06
P. 07
P. 08
P. 09
P. 10
P. 11
P. 12
P. 13
P. 14
P. 15
P. 16
P. 17
P. 18
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
You may also be interested in
Motor-spindle, Pneumatic spindle, Bearing, Ceramic bearing, Ball bearing
Text version of the page
| Accessory Selection | Options | |||||||||||||
| Spindle Drives UKF motorized spindles are available in many sizes and performances ranges, and are compatible with a variety of third-party spindle drives. Drives should be selected to provide an optimal system. Drives typically operate from 3-phase supply lines, at 208, 380, 400, or 440 volts, 50 to 60 Hz, as the case may be. Drives should be selected to provide an output voltage that is slightly higher than the motor's rating, to allow for sufficient operating overhead. The recommended reserve, based on an S6 duty-cycle (60%), is 20%; while 50% is recommended for an SI duty-cyle (100%). Motorized UKF spindles with encoder, e.g., Series RHF, allow true vector control, which substantially increases system efficiency, and reduces losses due to heat and vibration. With variable frequency drives, speed is proportional to the output frequency, so an encoder is not needed. When multiple encoder options are available, it is best to select a higher line count. This configuration reduces running disturbances and vibration, allowing for a smaller filter. The interface, for the temperature and position sensors, should ensure positive and secure connections for proper operation and reliability. | Optional Operating Time and Speed It is desirable to monitor elapsed operating time, especially actual spindle running time. Just as importantly: at what speed did that time accrue? Both data streams can, now, be monitored and logged by an optional, wireless sensor and data logger. For example: middle speed range 7000...7500 RPM during 4470 h upper speed range 14000...15000 RPM during 1290 h Caution: speed limit range 15500...16000 RPM during 120 h (!) This data can be invaluable for preventative maintenance and quality assurance purposes, especially in certified facilities. | |||||||||||||
| Optional Variable Preload Spindles, especially those in machining centers, have to operate over a wide speed range. The corresponding spindle bearings have to provide rigidity for higher cutting forces, yet, must also allow operation at high speeds and feeds. The UKF "VARIORING" system provides a method to continually vary the bearing's preload, between light and heavy, using hydraulic pressure. The system effectively increases and decreases the reaction forces on the bearings, adaptively to the external force and spindle speed. | ||||||||||||||
| Lubrication Systems Air-Oil lubrication systems are available from several sources. Each lube port supplies a single bearing in order to optimize the injection process. Clean, dry, compressed air, filtered to <, 5 Mm, or better, is essential. Filters, water traps and dessicators are required, and must be properly maintained. Generally, the supply pressure should be about 90 psi. The viscosity of the oil should not be too low, certainly not below VG 22 (ISO); it, too, must be filtered to <, 5 um. More frequent lube cycles and smaller quantities are preferrable to minimize slippage within thebearings. Lubricant quantities are usually empirically determined for each application. Theoretical values are often found to be Insufficient, and adjustments must be made as needed. The air and oil supply must be properly maintained to ensure reliability. | ||||||||||||||
| Cooling systems Environmentally friendly cooling systems to mitigate heat, primarily from the motor, are available from numerous third-party suppliers. Cooling systems should be matched to the operating demands of the spindle. Features to consider, when selecting a coolant system, include coolant level and flow sensors, which will help to ensure reliability and longevity. | ||||||||||||||
| www.ukf.de | ||||||||||||||