Rslm20 Scale Technical Specifications; Relm20 Scale Technical Specifications; Reference Mark; Limit Switches - Renishaw TONiC FS T301 Series Functional Safety Manual

RSLM20 scale technical specifications
Form (H × W)
Pitch
Accuracy (at 20 °C)
Supplied lengths
Material
Coefficient of thermal expansion (CTE)
(at 20 °C)
Mounting
Mass
Storage
RELM20 scale technical specifications
Form (H × W)
Pitch
Accuracy (at 20 °C)
(includes slope and linearity)
Supplied lengths
Material
Coefficient of thermal expansion
(at 20 °C)
Mounting
Mass
TONiC RSLM20/RELM20 Functional Safety installation guide and safety manual
1.5 mm × 14.9 mm
20 µm
±1.5 µm for lengths up to 1 m
±2.25 µm for lengths from 1 m to 2 m
±3 µm for lengths from 2 m to 3 m
±4 µm for lengths from 3 m to 5 m
(includes slope and linearity)
Calibration traceable to International Standards
20 mm to 5 m (available in increments of 10 mm)
Hardened martensitic stainless steel
10.1 ±2 µm/m/°C
Epoxy datum point and adhesive tape (nominal thickness
0.2 mm)
172 g/m
Lengths over 1.13 m are coiled (>600 mm diameter)
1.6 mm × 14.9 mm
20 µm
Certified to ±1 µm for lengths up to 1 m,
±1 µm/m for lengths >1 m to 1.5 m
Calibration traceable to International Standards
20 mm to 1.5 m (available in increments of 10 mm)
ZeroMet . High stability, low-expansion nickel-iron alloy
™
0.75 ±0.35 µm/m/°C
Epoxy datum point and adhesive tape (nominal thickness
0.2 mm)
184 g/m

Reference mark

Type
IN‑TRAC auto-phase optional reference mark, no physical adjustments required
Position RSLM20
RSLE20
RSLE20
RSLC20
RELM20
RELE20
Phasing
Auto-phased by readhead calibration routine
Mounting Self-adhesive backing tape
Repeatability Repeatability to unit of resolution throughout specified temperature range

Limit switches

Type
Magnetic actuators; with dimple triggers Q limit, without dimple triggers P limit
(see 'TONiC FS T301x readhead installation drawing' on page 6)
Trigger point The limit output is nominally asserted when the readhead limit switch sensor passes
the limit magnet leading edge, but can trigger up to 3 mm before that edge
Mounting Customer placed at desired locations
Self-adhesive backing tape
Repeatablity < 0.1 mm
Original instructions
Midpoint of scale length
(Option A) – 20 mm from end of scale (for use with 10 mm limits)
(Option B) – 70 mm from end of scale (for use with 20 mm and
50 mm limits)
Selectable reference marks every 200 mm
Midpoint of scale length
20 mm from end of scale
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