FEC MICRO NR User Manual

Page 19

FEC Micro Nutrunner Operations Manual

Chapter 1: Outline (Rev. 2: 02/12)

Page 1-5

1.4

System requirements

To ensure the most effective and extended use of all equipment, adhere to the following
specifications:

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Tool Installation

Tools must be installed in the proper positions and with adequate bolts. Use the supplied
bolts to prevent the tool from loosening due to vibration. A minimum of 2mm of clearance is
required between tools, with nothing touching a mounted tool that will impact free movement
for torque reaction (or improper torque readings will result). The tool assembly contains
precision parts and electronic components, and must not be subject to excessive shocks or
stresses.

Keep in mind that the torque transducer is a strain gage based instrument and, although it
has been designed to withstand sudden shock, repeated shock (over time) could damage the
transducer. Therefore, cylinder cushions or shock absorbers should be used to decelerate
spindle slides and prevent excessive (hard stop) vibration, particularly in short cycle time
applications operating at high speeds.

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Fastening Operation

Avoid fastening beyond the full scale torque. Do not use a duty cycle (the ratio of the tool
rotating time to the machine cycle time) higher than

%, even when the torque is below the

full scale value.

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Cable Wiring

Use the specified cables for all System connections.

Circuit breakers or fuses are required on branch circuit power feeds to the controllers.

Do not use a high voltage circuit as a frame ground (FG). Also, the frame ground should

be separate from the power ground.

When multiple MNR Controller units are used, ensure that each unit is connected to its

matching numbered tool, and that all connectors are locked.

I/O cables must be run separate from any high voltage power sources or cabling, and must

not exceed 50 feet in length.

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Control Equipment (MNR units) Installation Environment

Controllers should be located in a NEMA 12 enclosure.

Controller units must be located a minimum of 600 mm from high transient voltage sources

such as transformers, motor starters, AC inverters and AC contactors. If it cannot be
avoided, the units must be properly shielded.

Do not use at the following locations.

Areas under direct sunlight.

Areas where the environmental temperature is out of the 32 °~122° F range.

Areas where the relative humidity is above the 90% range.

Areas where the temperature changes quickly, which may cause moisture.

Areas where conductive powder, oil mist, saline, or organic solvents exist.

Areas that have corrosive or combustible gases.

Areas that have strong electric or magnetic fields.

Areas where a strong vibration or shock could be transmitted directly to a Controller unit or

tool.