GB946516A - Apparatus for indicating and/or controlling the extent to which a rotary member is rotated - Google Patents
Apparatus for indicating and/or controlling the extent to which a rotary member is rotatedInfo
- Publication number
- GB946516A GB946516A GB1734162A GB1734162A GB946516A GB 946516 A GB946516 A GB 946516A GB 1734162 A GB1734162 A GB 1734162A GB 1734162 A GB1734162 A GB 1734162A GB 946516 A GB946516 A GB 946516A
- Authority
- GB
- United Kingdom
- Prior art keywords
- scale
- coarse
- fine
- increment
- scales
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/18—Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form
- G05B19/19—Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form characterised by positioning or contouring control systems, e.g. to control position from one programmed point to another or to control movement along a programmed continuous path
- G05B19/27—Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form characterised by positioning or contouring control systems, e.g. to control position from one programmed point to another or to control movement along a programmed continuous path using an absolute digital measuring device
Landscapes
- Engineering & Computer Science (AREA)
- Human Computer Interaction (AREA)
- Manufacturing & Machinery (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Automation & Control Theory (AREA)
- Length Measuring Devices By Optical Means (AREA)
- Length Measuring Devices With Unspecified Measuring Means (AREA)
- Optical Transform (AREA)
Abstract
946,516. Lathes. ROLLS-ROYCE Ltd. May 4, 1962, No. 17341/62. Heading B3T. [Also in Division G4] In a lathe control system, Fig. 1, as the cut approaches the desired depth a green light 31 comes on and when the desired depth is reached a red light 30 comes on and at the same time a unit 29 locks the tool carrier against further inward movement as described in Specification 936,716 which is referred to. Overall control is effected by a unit 26 (no details given) which receives signals from a shaft digitizer 24 (see Division G4 and below) indicative of the actual depth of cut and signals from record cards on tape indicative of the desired depth of cut. The shaft position digitizer comprises coarse 57 and fine 56 monophylic scales, Figs. 2 and 3, coupled by continuous gearing to a shaft 23 and is characterised in that transitional errors are reduced by an arrangement whereby the sensing units for the coarse scale are normally clamped to the scale so as to move with it, the clamping only being released, momentarily, each time the fine scale completes a revolution, at which instant the coarse sensing units are retarded with respect to the scale, by one increment of the scale. Thus although the fine and coarse scales are continuously coupled, because of the motion of the coarse sensing units the arrangement is equivalent to an intermittent coupling between the scales. In the particular arrangement described, Fig. 3, photo-electric sensing is used and light transmitted through the coarse scale 57 passes via light guides 73 to fixed cells 75. In operation the member 74, 81 carrying the light guides is normally frictionally clamped to the coarse scale. Each time the fine scale 56 completes a revolution a magnet 46 attached to it passes in close proximity to a second magnet 87. This causes firstly the clamping to be released and secondly, as the fine scale continues to rotate, the retardation of the light guide carrying member 74 by one increment of the coarse scale, this increment being set by stops 93.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1734162A GB946516A (en) | 1962-05-04 | 1962-05-04 | Apparatus for indicating and/or controlling the extent to which a rotary member is rotated |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1734162A GB946516A (en) | 1962-05-04 | 1962-05-04 | Apparatus for indicating and/or controlling the extent to which a rotary member is rotated |
Publications (1)
Publication Number | Publication Date |
---|---|
GB946516A true GB946516A (en) | 1964-01-15 |
Family
ID=10093475
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1734162A Expired GB946516A (en) | 1962-05-04 | 1962-05-04 | Apparatus for indicating and/or controlling the extent to which a rotary member is rotated |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB946516A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5444294A (en) * | 1977-09-14 | 1979-04-07 | Tarou Takahashi | Tool rest for numerical controlled lathe |
-
1962
- 1962-05-04 GB GB1734162A patent/GB946516A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5444294A (en) * | 1977-09-14 | 1979-04-07 | Tarou Takahashi | Tool rest for numerical controlled lathe |
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