Product Focus: Motors & Motion Control 2023
Slotted Brushless DC Gearmotor
An arthroscopic joint shaver highspeed gearmotor is available from Portescap, West Chester, PA. The B0614A4 size 6 SMS brushless DC slotted mini motor is optimized for arthroscopic shaver applications and has been upgraded for higher speeds. The mini motor is ideal for powered surgical hand tools that are used in minimally invasive surgical procedures to repair joints such as the hip, knee, and shoulder. The gearmotor is designed for high reliability in autoclave environments and can withstand up to 1,000 autoclave cycles. It is available in two winding variations and with an output shaft sealing option for improved reliability.
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Precision Ball Splines
Thomson Industries, Inc., Wood Dale, IL, has introduced a line of precision ball splines that enable robust delivery of rotary and linear motion on a single shaft. The ball splines exploit the low-friction torque transmission capabilities of rolling balls and augment that by adding one or more axial grooves, also known as splines, along the assembly shaft. The high-precision ball splines are available immediately in lengths up to 300 mm; diameters between 6 and 30 mm are standard. Larger diameters of 40 and 50 mm are available upon request. The ball splines can handle loads up to 1,000,000 Nmm, speeds up to 10,000 rpm, and with precision of ±17 μm with or without flanges.
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Servo Drive System
Siemens, Washington, DC, has expanded its drive portfolio in the extra-low-voltage range for 24–48 V EC motors. The Simatic Micro-Drive line consists of the PDC (Profidrive Control) servo drive in conjunction with a range of motors and connecting cables from product partners, along with the technology module format with 20-mm servo and stepper drives, which can be used in conjunction with distributed or open controllers. The motors feature smart encoders and one-button tuning. A safety integrated function limits torque by monitoring motor current in running operation.
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Vertical Lift Stage
A series of motorized vertical lift stages from Optimal Engineering Systems, Inc. (OES), Van Nuys, CA, features a vertical lift of 600 mm. The AT20-600-01 is driven by a two-phase stepper motor and features a repeatability of 5 μm and positional accuracy of 20 μm, and it has a knob on the motor for manual adjustment. The 600 × 600 mm stage table has a pattern of threaded mounting holes, and the rigid box construction of the moving component of the elevator stage travels on six slide rails. The 50 kg load capacity of the AT20-600 stages allows for positioning of multi-axis stages. Constructed of black-anodized aluminum alloy and steel shafting, it incorporates a center mounted, precision ground lead screw having a transmission ratio of 663 μm per motor revolution, removing the concern for cantilevered effects or loss of parallelism.
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