Application areas for stepper motors fitted with spur gearboxes has
increased considerably in recent years, according to hybrid stepper motor
supplier, Rotalink. New areas include analytical instruments, air and
liquid valve control, vending machines and dispensing equipment, which
once might have used gearboxes with conventional ac synchronous, shaded
pole or dc motors. However, as designers seek increased acceleration and
performance, the use of hybrid stepper motors, with their inherent low
cost open loop control, has become more commonplace.
Rotalink's standard SQ40 range of spur gearboxes offers ten ratios from
5:1 to 2,000:1 with others available on request. Featuring a square
66mmx40mm deep diecast aluminium case with sintered bronze or optional
ball race bearings, the gearbox can withstand ambient case temperatures
up to 80oC. Shafts can be adapted to customer requirements, while the
standard hobbed steel gears running on hardened spindles, can be upgraded
to nitrided steel alternatives, increasing output torque from 6Nm to
10Nm. The company's hybrid stepper motor offering covers 14 to 34 NEMA
frame sizes, and motors can be supplied with matching drives and
controllers, plus all necessary accessories.
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