The latest servomotor technologies are established in a wide variety of industries such as medical, automation, robotics, and semiconductor. As markets for increased speed and accuracy continue, coupling technology must expand to ensure excellent servo system performance. 

 

Flexible servo couplings were particularly formulated to solve the difficulties built by lateral, angular, and axial misalignment in drive systems. Flexible couplings fasten to machine drive shafts to disseminate torque while including misalignment. Couplings used for a servo system require zero backlashes, flexibility, and torsional rigidity. 

 

Couplings for servo applications usually bind precision drives to susceptible loads, so they cannot provoke any error. That’s why servo couplings should be zero backlash — to deter problems with timing and predictability (not to mention failures due to hammering on reversing axes). Couplings for servo applications must moreover have high torsional stiffness while imparting slight compassion of misalignment (within specifications) of rotating shafts … even while holding transmitted rpm steady to motor output rpm. 

 

Here’s a further complete list of parameters That We Should Consider While Picking Servo Couplings for Servo Applications 

 

  1. Coupling type

Industrial Couplings shouldn’t be the last motion component stipulated because proper servo-machine function banks on having an acceptable coupling in place. Torsional rigid options (ideal for motion designs) encompass specialty bellows couplings, rubber-jaw couplings, and disc couplings. 

 

  1. Sizing for torque (and speed)

After specifying the coupling type, the design engineer must assign a coupling size. This is heavily conditional on axis speed (rpm), the levels of torque the axis must convey, and the service factor the application expects. Axes that transmit constant torque are modest to determine; in contrast, axes that convey variable torque need additional consideration. 

 

  1. Coupling immobility

Along with exacting control of position, force, or output velocity, it’s always crucial to conserve high efficiency. Couplings that show windup or backlash degrade this efficiency because they must survive load inertia every move cycle. This can be a crucial drawback in some layouts … which is why (particularly on axes employing rigid couplings) couplings should be deterred from inadvertently functioning as flywheels. 

 

  1. Coupling inertia

As mentioned, this is a significant parameter for a few reasons. Applications with very aggressive motion profiles rely on low servo coupling inertia maximum of all. 

 

  1. Coupling damping capabilities

Disc couplings, certain bellows couplings, and high-gain rubber-type couplings are all alternatives for coupling-based damping in servo applications.  

 

  1. Ability to handle reversals

Servo applications that must make abrupt directional modifications employ special deliberation. Here, contemplate torque correlated with system inertia starting and stopping. Service factors can often quantify the impact this value will have on assembly dynamics.  

 

  1. Material fatigue 

Another aspect of reversing loads to contemplate is coupling-material fatigue. Keep in the sense that some servo couplings that excel in regular applications can fail within weeks (or sooner) when compelled to disseminate power under reversing conditions. 

 

  1. Shaft connections

Most servo couplings attach shafts with clamping or locking mechanisms (and not keyways). Though keyways are always given as an option to deter shaft slippage, the truth is that they can be a detriment — adding concentrations of anxieties in shaft connections, unfair cost, risk of inequality, and other probable drawbacks.  

 

Function to safeguard extra expensive subcomponentsthrough system failures are adequately avoided, servo couplings can be formulated to conserve the axis actuator or geared motor and gearbox by breaking if there is a machine crash or unfortunate overload.  

 

 

 Summary -  

In servo applications, industrial couplings manufacturers usually bind high-precision and high-speed drives to sensitive loads. Couplings must have high-torsional stiffness, zero backlashes, and misalignment capability while holding transmitted rpm.  

 

Resource box -  

A recent improvement in servomotors has increased their speed response frequency, but vibration or hunting occurrences arise when the increased gain is present, especially where disc or bellows couplings are used.