Renishaw RGH41, Installation Manual, Page: 14 / 15

RGH41 RGS40 installation guide 12
Scale specifications
Scale type RGS40-S Reflective gold plated steel tape with protective lacquer coating.
Adhesive backing tape allows direct mounting to the machine substrate.
RGS40-P Reflective gold plated steel tape with tough polyester coating for
applications using harsh solvents.
Adhesive backing tape allows direct mounting to the machine substrate.
Scale period 40 µm
Linearity RGS40-S ±3 µm/m
RGS40-P ±5 µm/m
Scale length Up to 50 m (>50 m by special order)
Form
(H x W)
RGS40-S 0.2 mm x 6 mm (includes adhesive)
RGS40-P 0.3 mm x 6.3 mm (includes adhesive)
Substrate materials Metals, ceramics and composites with expansion coefficients
between 0 and 22 µm/m/°C
(steel, aluminium, Invar, granite, ceramic etc.)
Expansion coefficient
Matches that of substrate material when scale ends are fixed by
epoxy mounted end clamps
End fixing Epoxy mounted end clamps (A-9523-4015) using 2 part epoxy
adhesive (A-9531-0342)
Scale end movement <1 µm over temperature range -20 °C to +50 °C
Temperature Operating -10 °C to +120 °C.
Minimum installation 10 °C
Storage -20 °C to +70 °C.
Humidity 95% relative humidity (non-condensing) to EN 60068-2-78
General specifications
Power supply 5 V ± 5% RGH41A <140 mA
RGH41B <120 mA
RGH41T, D, G, X <95 mA
RGH41N, W, Y, H <150 mA
NOTE:
Current consumption figures refer to unterminated readheads.
For digital outputs a further 35 mA per channel pair (e.g. A+, A-) will
be drawn when terminated with 120
Ω
.
For analogue outputs a further 20 mA will be drawn when terminated
with 120
Ω
.
Power from a 5 V dc supply complying with the requirements for SELV
of standard IEC BS EN 60950-1.
Ripple 200 mVpp@frequency up to 500 kHz maximum.
Temperature Storage -20 °C to +70 °C
Operating 0 °C to +55 °C
Humidity 95% relative humidity (non-condensing) to EN 60068-2-78
Sealing IP50
Acceleration Operating 500 m/s
2
, 3 axes
Shock Non-operating 1000 m/s 2 , 6 ms, ½ sine, 3 axes
Vibration Operating 100 m/s
2
max @ 55 Hz to 2000 Hz, 3 axes
Mass Readhead 50 g
Cable 38 g/m
Cable 12 core, double shielded, outside diameter 4.5 ±0.2 mm.
Flex life >20 x 10
6
cycles at 50 mm bend radius.
Renishaw encoder systems have been designed to the relevant EMC standards, but must be
correctly integrated to achieve EMC compliance. In particular, attention to shielding
arrangements is essential.