摘要:
There is provided a programmable sequence controller which need not be equipped with a tape reader for reading a paper tape bearing a punched program or the like. A prepared sequence program or the like is punched in a paper tape in accordance with the standards of a paper tape reader 101 a which is provided in a numerical control device 1, and then is transferred from the numerical control device 1 to a random access memory 201c in the programmable sequence controller 2. The sequence program is read from the random access memory 201 c to permit the execution of sequential operations by processing the program.
摘要:
During a tracing operation of a tracer head (TR) the present position of the tracer head in the Z-axis direction is detected and a maximum value (Zma) of the detected tracer head positions is stored in a memory means (AR). When the tracer head (TR) is returned from a trace terminating end (LX2) to a trace starting end (LX1), it is quickly returned to a position (Zma + a) corresponding to the sum of the stored maximum value (Zma) and a constant value (a).
摘要:
A sequence controller executes sequence control of a machine tool through a sequence program by executing a subroutine program. A function command specifying a subroutine (ROT SUB 6) is divided into control condition data (RNO, DIR, POS, ACT) and operational parameters (Number of rotational positionings, present position address etc.). A memory holds the control condition data (RNO, DIR, POS, ACT). In response to a command the control condition data is read from the memory to a register. Under control of the subroutine program the control condition data is read from the register and the operational parameters are read. The result of. execution of the subroutine program is stored in the memory and the machine tool is controlled in dependence upon that result. The subroutine program thus includes command (RD or. RD. STK) for reading the control condition data from the register, and operational parameter data. Sequence control involving the subroutine program can be represented in a sequence diagram in which a function command for the subroutine is divided into control conditions (RNO, DIR, POS, ACT) and parameters (number of rotational positionings present position address etc.).
摘要:
In one forward or backward trace path on a model (MDL), a jerk inatracer control system point (P 1 to P 4 ) in the surface configuration of the model (MDL) is detected and the position of the jerk point is stored in a memory (MEM). The reduction of the trace velocity is started a predetermined distance (a) short of the stored position of the jerk point (P 1 to P 4 ) in the trace direction and when a jerk point is detected again, the position of the jerk point previously stored in the memory (MEM) is updated and the reduction of the trace velocity is released, thus achieving high accuracy trace.
摘要:
The power source device 3 has a first DC power source circuit 12 for supplying a DC voltage Ec for control circuitry 2 of bubble memory unit 1, a second DC power source circuit 13 for supplying a voltage Ed for drive circuitry of the unit 1, and also supplies a memory enable signal Me for the unit 1. A comparator 14 compares Ec with a reference level Vm. Source circuit 13 is actuated at a given delay time after Ec exceeds Vm whereafter Me is produced. When Ec falls below Vm, Me is cancelled immediately and source circuit 13 is switched off after a time delay.
摘要:
A processor 3 reads the words of a logical block, e.g. BL i , from memory, e.g. RAM2, and checks the block by operating on the words and comparing the result with a predetermined value. For example, processor 3 performs exclusive OR operations between homologous bits of a word Wi, W 2 , W 3 , W 4 , OCW i , and contents of a register 3c and sets the resultant in register 3c. Initially register 3c holds all «O»s. When first word Wi is «01001010» the resultant set in register 3c is «01001010». Homologous bits of this resultant and second word W 2 are exclusive OR-ed to give «11100000» in register 3c. Similar operations are effected for W 3 , W 4 and OCW i . If block BL i checks correctly a predetermined result «00000000» is found in register 3c. Word OCW I is an operational control word provided in block BL i , when words W 1 to W 4 are stored, to ensure that the predetermined result will be arrived at in the case of correct checking.
摘要:
Tracer control apparatus, for a tracer machining system, has a memory storing position A, along the PICKFEED AXIS, of the first clamping feed in initial tracing of a clamping feed area H1 and position B at which clamping feed is absent after initial tracing of area H1. Using the stored positions the apparatus causes repeat tracings back and forth between A and B. Clamping level setting means 11 to 15 set an initial clamping level LCZ for clamping feeds in initial tracing of area H1, and add increments inc to that level for successive repeat tracings. Only when the incremented clamping level is not reached in a repeat tracing, or the incremented level reaches a limit value, does tracing proceed beyond area H1. The clamping level is set back to its initial value. A method of machining is provided in which repeat tracing is carried out only in areas where required, e.g. H1, in dependence upon stored positions A and B and incrementing clamping levels.
摘要:
The converter circuit has n memory elements M1 to Mn. An input signal is fed through terminal IN to the memory elements M1 to Mn. At a timing instant (e.g. t1) element M1 holds the present value (e.g. 4) of the input signal and elements M2 to Mn hold the values (e.g. 0) of the input signal at n-1 preceding timing instants. The values held in the memory elements M1 to Mn are added (in adder ADD), the result divided by n (in divider DV), and the divided result fed at an output signal value from output terminal OUT. Where the input signal is a signal indicating a desired amount of movement, of a movable machine part, in numerical control apparatus, an abrupt change in the input signal is converted to a gradual change in the output signal, which facilitates smooth control of the movable machine part.