Renishaw VIONiC RELM20, Руководство по установке, Страница: 22 / 23

VIONiC RSLM20/RELM20 installation guide 20
RSLM20 scale technical specifications
Form (H × W) 1.5 mm × 14.9 mm
Pitch 20 µm
Accuracy
(at 20 °C) ±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
Supplied lengths
20 mm to 5 m (available in increments of 10 mm)
Material Hardened martensitic stainless steel
Coefficient of thermal expansion
(at 20 °C)
10.1 ±2 µm/m/°C
Mounting
Epoxy datum point and adhesive tape (nominal thickness
0.2 mm) or datum clamp and mounting clips
Mass
172 g/m
Storage
Lengths over 1.13 m are coiled (> 600 mm diameter)
Reference mark
Limit switches
Type
IN-TRAC auto-phase optional reference mark, no physical adjustments required
Position RSLM20 Midpoint of scale length
RSLE20 (Option A) – 20 mm from end of scale (for use with 10 mm limits)
RSLE20 (Option B) – 70 mm from end of scale (for use with 20 mm and
50 mm limits)
RSLC20 Selectable reference marks every 200 mm
Phasing Auto-phased by readhead calibration routine
Repeatability Repeatability to unit of resolution throughout specified temperature range
Type Magnetic actuators; with dimple triggers Q limit, without dimple triggers P limit
(‘VIONiC readhead installation drawing’, page 4)
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
Repeatablity < 0.1 mm
RELM20 scale technical specifications
Form (H × W) 1.6 mm × 14.9 mm
Pitch
20 µm
Accuracy (at 20 °C)
(includes slope and linearity)
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
Supplied lengths 20 mm to 1.5 m (available in increments of 10 mm)
Material ZeroMet
™
. High stability, low‑expansion nickel‑iron alloy
Coefficient of thermal expansion
(at 20 °C)
0.75 ±0.35 µm/m/°C
Mounting Epoxy datum point and adhesive tape (nominal thickness
0.2 mm) or datum clamp and mounting clips
Mass 184 g/m
Reference mark
Limit switches
Type IN-TRAC auto-phase optional reference mark, no physical adjustments required
Position
RELM20 Midpoint of scale length
RELE20 20 mm from end of scale
Phasing
Auto-phased by readhead calibration routine
Repeatability Repeatability to unit of resolution throughout specified temperature range
Type Magnetic actuators; with dimple triggers Q limit, without dimple triggers P limit
(‘VIONiC readhead installation drawing’, page 4)
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
Repeatablity
< 0.1 mm