Cables
Cables are an important part of a servo system installation. Not only must the noise immunity and integrity of the cabling and connectors be correct, but also SAFETY and EMC regulations must be complied with to ensure successful, reliable and fail safe operation. One of the most frequent problems experienced by motion systems engineers is incorrect connections of the motor to the drive.
Control Techniques ready made cables mean system installers can avoid the intricate, time consuming assembly normally associated with connecting servo systems. Installation and set-up time are greatly reduced - there is no fiddling with wire connections and crimp tools, and no fault finding.
The cables are available in lengths from 3m to 50m/100m (custom lengths available).
Cable range for motor-drive combination
Unimotor fm E3/U3 to Unidrive M and Digitax ST
E3 to Epsilon or EP
Power cable variants
Phase conductors 1.0mm² (10A) to 16mm² (70A)
With and without brake wire pairs
Motor end connector
Motor end Ferrules for Hybrid box
Drive end is tailored to suit the drive and can be Ferrules or Ring terminals
Cable features
For dynamic performance PUR outer sheath for oil resistance and dynamic performance. The PUR jacket has excellent abrasion, chemical and ozone resistance, low smoke, low halogen flame retardant construction suitable for internal and external industrial environments.
Complies with DESINA coding - Orange for power, Green for signal
Power cable and plugs UL recognized
Optimum noise immunity
Encoder cable has low volt drop for long cable lengths and separately screened thermistor wires.
No need for crimp and insertion / removal tools
Production build gives quality and price benefits
Braided screen for greater flexibility and wear
Power cables with and without brake wires
Cable assembly type identification label
Brake wires are separately shielded within the power cable
Fan Box (field fitted)
Available for 075 to 190.
One fan box per frame size.
Easy assembly onto fm motors using two screws per side fitting into existing Unimotor fm housing slots.
Fan blown models available with higher performance (E5/U5 models).
Feedback
Resolver
A passive wound device consisting of a stator and rotor elements excited from an external source, such as an SM-Resolver, the resolver produces two output signals that correspond to the sine and cosine angle of the motor shaft. This is a robust absolute device of low accuracy, capable of withstanding high temperature and high levels of vibration. Positional information is absolute within one turn - i.e. position is not lost when the drive is powered down.
Incremental Encoder
An electronic device using an optical disc. The position is determined by counting steps or pulses. Two sequences of pulses in quadrature are used so the direction sensing may be determined and 4 x (pulses per rev) may be used for resolution in the drive. A marker pulse occurs once per revolution and is used to zero the position count. The encoder also provides commutation signals, which are required to determine the absolute position during the motor phasing test. This device is available in 4096, 2048 and 1024 ppr version. Positional information is non absolute - i.e. position is lost when the drive is powered down.
SinCos/Absolute Encoders
Types available are: Optical or Inductive - which can be single or multi-turn.
Optical: An electronic device using an optical disc. An absolute encoder with high resolution that employs a combination of absolute information, transmitted via a serial link, and sine/cosine signals with incremental techniques.
Inductive: An electronic device using inductively coupled PCB’s. An absolute encoder with medium resolution that employs a combination of absolute information, transmitted via a serial link, and sine/cosine signals with incremental techniques. This encoder can be operated with the drive using either sine/cosine or absolute (serial) values only. Positional information is absolute within 4096 turns - i.e. position is not lost when the drive is powered down.
Multi-turn
As previous but with extra gear wheels included so that the output is unique for each shaft position and the encoder has the additional ability to count complete turns of the motor shaft up to 4096 revolutions.
Electronic nameplating
Available on both these types of encoders, and allows quick set-up times as the motor information is stored on board the encoder (075-250 motor only).