Motor components
6.5 Drive coupling
Synchronous Motors 1FK7
Configuration Manual, (PFK7S), Edition 12.2006, 6SN1197-0AD16-0BP1
89
6.5 Drive coupling
6.5.1 Function description
Function description
After investigating various drive-out couplings for servomotors in conjunction with Siemens
drive converters, it was seen, that in many cases, the drive-out couplings were the cause
of vibration problems. In order to achieve optimum drive-out characteristics, ROTEX
Ⓡ
GS
couplings supplied by KTR should be used. The advantages of ROTEX
Ⓡ
GS couplings
include:
• 2 to 4x torsional stiffness of a belt-driven gearbox
• No intermeshing teeth (when compared to belt gearboxes)
• Low moment of inertia
• Good control behavior
When it comes to mounting, the clamping hub without key is considered to be adequate up
to a coupling size of 38 and up to the specified torques that can be transferred. The friction
torques must always be adequately dimensioned depending on how they are assigned to
individual motor frame sizes. The accelerating torque also has to be transferred.
From a coupling size of 42 or as an alternative to the clamping hub, we can recommend the
version with clamping ring hub. This means that the maximum coupling torque can be almost
reached.
The investigations extend to include the vibration characteristics and behavior.
The couplings assigned to the motors permit higher speed control loop gains and therefore
result in the highest possible K
V
values and uniform motion.
ROTEX
Ⓡ
GS couplings are available with 4 different plastic pinion gears with various Shore
hardnesses:
98 or 95 Shore A (average)
Alternatively: 92 Shore A
Alternatively: 80 Shore A (soft)
Alternatively: 64 Shore D (hard)
The adaptation to the existing machine masses and stiffness, which becomes possible,
must be determined, taking into account the mounted mechanical system.
Ordering address
Address: KTR
Kupplungstechnik GmbH
Rodder Damm 170, D - 48432 Rheine
Postal address: Postfach 1763, D - 48407 Rheine
Phone: +49 (0) 5971 / 798 - 465 (337)
Fax: +49 (0) 5971 / 798 - 450
Internet at:
www.ktr.com
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