Renishaw Plc · LSE:RSW
Renishaw — Technical Presentation
19 slides from Renishaw's technical presentation
Slide 1: SP80 and SP80H
RENISHAW.E apply innovation™ SP80 and SP80H
Slide 2: SP80 and SP80H design principles
SP80 and SP80H design principles Renishaw's design brief for SP80 and SP80H: · Very accurate position sensing · Long reach into parts · Passive design to avoid unnecessary system complexity · Designed to avoid stacked axis errors • Stylus changing capability for reduced cycle times • Both probe type
Slide 3: SP80 and SP80H design principles
SP80 and SP80H design principles SP80 is a PASSIVE sensor (as opposed to an ACTIVE sensor type) so its features are: • Simple, accurate and high-performance design • Robustness and high resistance to most collision damage • Use of long, heavy, complex and rapidly interchangeable styli • Long service
Slide 4: SP80 and SP80H design principles
SP80 and SP80H design principles SP80 is an ANALOGUE scanning probe: • Giving a continuous reading at any time while in contact with the part • An integral part of the CMMs motion control system - real time X, Y and Z outputs • A probe whose output is proportional to its deflection H-1000-8004-01-B
Slide 5: SP80 and SP80H design principles
SP80 and SP80H design principles Passive sensor - no motors •Minimal heat source for greater stability •No electro-mechanical wear •Reduced vibration during discrete point measurement H-1000-8004-01-B Slide 5
Slide 6: SP80 and SP80H design principles
SP80 and SP80H design principles Box spring mechanism • Unique design • Compact and robust mechanism • Low inertia • Rapid dynamic response Parallel acting • Low spring rates springs • Single 3D ferro-fluid damper • Avoids stacked axis errors H-1000-8004-01-B Slide 6
Slide 7: SP80 and SP80H design principles
SP80 and SP80H design principles XY crash protection • Stylus holder joint has low release force • Over-travel in XY causes stylus holder to detach Z crash protection • Outer housing provides a ‘bump stop’ to prevent damage to probe mechanism and readhead Stylus deforms in a severe Z crash, whilst p
Slide 8: SP80 and SP80H design principles
SP80 and SP80H design principles Isolated optical metrology • Readheads attached to probe housing • Measures deflection of whole mechanism, not just one axis: • Eliminates inter-axis errors • Picks up thermal and dynamic effects H-1000-8004-01-B Slide 8 SP80 avoids inter-axis error
Slide 9: SP80 and SP80H design principles
SP80 and SP80H design principles • Probes with stacked axes cannot measure inter-axis errors directly • SP80 features digital readheads with 0.02 m resolution reading precision gratings • accuracy defined by straightness of lines on each grating and calibrated squareness of gratings, not by probe m
Slide 10: Readhead arrangement
SP80 and SP80H design principles Readhead arrangement X Z Y H-1000-8004-01-B Slide 10
Slide 11: Readhead operating range
SP80 and SP80H design principles SP80 readhead operating range Standoff 1 mm to 7 mm 6 mm (XY) (7 mm (Z) H-1000-8004-01-B Slide 11
Slide 12: Readheads permit a large operating range on SP80
SP80 and SP80H design principles Readheads permit a large operating range on SP80… + 4.5 mm Fixed probe body + 2.5 mm Fixed probe body with integral with integral 7 mm ‘Z’ readhead 7 mm ‘Z’ readhead operating operating range range Reflective Reflective - 4.5 mm scale scale - 2.5 mm Moving Moving str
Slide 13: and on SP80H
SP80 and SP80H design principles …and on SP80H 2 mm ‘Z’ operating range 4 mm ‘Z’ operating range -3.25 mm +1.25 mm -0.75 mm +1.25 mm Fixed Min stylus probe Fixed mass body with Max stylus probe integral mass body with Moving Reflective readhead structure* scale Moving Reflective integral structure*
Slide 14: SP80 maximum stylus carrying capability
SP80 and SP80H design principles SP80 maximum stylus carrying capability • Maximum unidirectional length 1000 mm (using SH80 EXT) Up to 1000 mm • Maximum load 500 g with no -Z range (unbalanced) compromise Up to • >500 g reduces -Z range 1000 mm • Styli thread M5 H-1000-8004-01-B Slide 14
Slide 15: SP80H maximum stylus carrying capability
SP80 and SP80H design principles SP80H maximum stylus carrying capability • Maximum unidirectional length 500 mm Up to 500 mm • Maximum stylus weight 200 g with centre of (subject to weight gravity 100 mm max from stylus holder cube restriction) • Styli thread M5 Up to 500 mm (subject to weight rest
Slide 16: SP80 - scanning performance (up to 1000 mm stylus)
SP80 - scanning performance (up to 1000 mm stylus) ISO 10360-4 filtered data Bi-directional scan span filtered data ISO 10360-2 25 pt touch 7 6 A90 B0 probe orientation CMM specification: U = 0.48 µm ± L/1000 CMM controlled by Renishaw UCC2 and SPA2 5 Scan deflection = 0.5 mm 4 Scan speed = 5 mm/s D
Slide 17: SP80 and SP80H specification summary
SP80 and SP80H specification summary Mounting Vertical fixed quill mount with options: KM80 standard mount method KM6080 adapts down to 60 mm × 60 mm quill SM80 shank mount - non-preferred Probe physical size 80 mm square body 105 mm long including SH80 Probe mass SP80 probe body 860 g (incl. 160 g
Slide 18: SP80 and SP80H specification summary
SP80 and SP80H specification summary Calibration method Simple 1st order polynomial (3 × 3 matrix) SP80 nominal spring rate 2 N/mm X,Y,Z SP80H nominal spring rate 1.8 N/mm X,Y 2.5 N/mm Z Readhead resolution Digital scales capable of 0.02 µm SP80 measurement range ±2.5 mm X,Y,Z (even with up to 500 g
Slide 19: Thank you for your attention
SP80 and SP80H Thank you for your attention…