CN2781644Y

CN2781644Y - Plug for controlling motion of step-by-step motor

Info

Publication number: CN2781644Y
Application number: CN 200520105660
Authority: CN
Inventors: 朱文
Original assignee: Individual
Current assignee: Individual
Priority date: 2005-04-28
Filing date: 2005-08-26
Publication date: 2006-05-17
Anticipated expiration: 2015-08-26

Abstract

The utility model relates to a motion control plug of a step motor, which belongs to step motor control technology. The controller of the utility model comprises a serial plug, a serial conversion circuit, an embedded type single chip computer, a power supply management chip and a step motor output control plug, wherein the serial plug is externally connected with an upper computer and internally connected with the embedded type single chip computer through a serial conversion chip; the step pulse output end, the running direction output end, the semi-flow control output end and the driver gating output end of the embedded type single chip computer are respectively connected with the step motor output control plug; besides, the output end of the power supply management chip is respectively connected with the serial conversion chip and the power supply end of the embedded type single chip computer. The utility model receives motion control instructions from a computer through serial ports, the motion control instructions are processed by the embedded type single chip computer which converts the motion control instructions into single shaft or more than two shafts of step motor control pulses and control levels so as to control various motion of the step motor. The utility model does not need to be arranged in an extension slot in the computer, and has the advantages of small size, low cost and plug and play.

Description

Stepping motor motion control plug

Technical field

The utility model relates to the step motor control technology, particularly a kind ofly accepts the single shaft of control signal or the motion control device of multiaxis by serial ports of computers.

Technical background

Stepping motor is at self-reacting device, medicine equipment, Digit Control Machine Tool and obtained application widely above the production line.The method of conventional computer control step motor is to adopt at computer-internal mounted movable control card, and the output plug above the motion control card is connected with stepper motor driver, controls one or the operation of multiaxis stepping motor.But because general motion control card is a kind of plate card type parts that must insert computer cabinet, so there is not the notebook computer of computer slot not have the computer of slot to use with some.Add that installation must open computer cabinet, the dismounting motion control card is very inconvenient.Using on the various computing machine so just needs to buy more motion control card, adds that every card is moving then thousands of, and cost is very high.

Summary of the invention

In order to address the above problem, the utility model is concentrated to the basic function of motion control card on the slight chip, and it is installed in the serial line interface plug inside of computer outside, and will receive embedded scm inside by the step motor control order that serial ports transmits by this plug and resolve and carry out, directly export step-by-step impulse and traffic direction signal to stepper motor driver by this cable above plug then, the control step motor is realized straight line in real time, circular interpolation and feeding and high-speed cruising control, it is little to obtain a kind of volume thus, cost is low, be easy to dismounting, the stepping motor motion control plug that carries.

The technical solution of the utility model is as follows:

It is an embedded scm, serial ports conversion chip and a block power supply managing chip are installed and are formed serial ports of computers plug inside for this stepping motor motion control plug.The serial interface plug of this control plug externally is connected with host computer, internally connect embedded scm by the serial ports conversion chip, with host computer send motion control instruction be sent to embedded scm, finish the level conversion and the transfer of data work of the rs 232 serial interface signal of computer input.Embedded scm is inner to embed the instruction decomposition that has write and converts the step-by-step impulse that universal driver needs to, the direction of motion, driver gating and semi-fluid locking control program, convert the motion control instruction that receives to step motor control pulse and control level by its internal processes, embedded scm is by its step-by-step impulse output, the traffic direction output, the semi-fluid control output end, driver gating output connects stepping motor output control plug, with step-by-step impulse, direction, semi-fluid control, the driver gating signal flows to stepper motor driver.Power management chip is that the serial line interface level transferring chip and the embedded scm of plug improves working power, the serial ports conversion chip of its output difference attachment plug and the power end of embedded scm.

As shown from the above technical solution, this motion control plug is when being used for step motor control, can replace motion control card, directly the motion control commands with host computer is converted into step-by-step impulse, the direction of motion, semi-fluid control, the driver gating signal that can directly be connected with stepper motor driver, and can finish the basic controlling requirement of using stepping motor to drive the mechanical part motion by accepting the limit switch signal of mechanical moving element.Because the running environment of embedded software is the embedded single-chip computer system that is not subjected to the independent operating that computer operating system influences, so stepping motor running real-time is good, the precision height.Motion control plug of the present invention has the advantage that volume is little, cost is low, be easy to dismounting and carry; really make the motion control plug accomplish plug and play; under non-stop-machine situation, need not any extra installation; directly can use, can be widely used in the step motor control occasion by the serial ports hold-down screw is fixing.

Description of drawings

Fig. 1 is used for the schematic diagram of twin shaft step motor control system for this motion control plug;

Fig. 2 is the structural representation block diagram of motion control plug of the present utility model;

Fig. 3 is the circuit theory diagrams that realize technical solutions of the utility model a kind of is used to control the motion control plug of twin shaft stepping motor.

Embodiment

Referring to Fig. 2, stepping motor motion control plug can directly be inserted into above the serial ports of computers by RS232,485 or a plug form forming of USB serial line interface 21, embedded scm 22, power management chip 25, power input 24 (see figure 3)s and stepping motor output control plug 23.The serial line interface 21 of this control plug externally is connected (see figure 1) with host computer 1, internally connect embedded scm 22, with host computer 1 send motion control instruction be sent to embedded scm 22, finish the level conversion and the transfer of data work of the rs 232 serial interface signal of computer input.Embedded scm 22 inner instruction decomposition and the control programs such as the step-by-step impulse that converts automatic lifting frequency function to, the direction of motion that write that embed, convert the motion control instruction that receives to step motor control pulse and control level by its internal processes, embedded scm connects stepping motor output plug 23 by its step-by-step impulse output, traffic direction output, semi-fluid control output end, driver gating output, and step-by-step impulse, direction, driver gating, semi-fluid control signal are flowed to stepper motor driver.In the motion control plug inside electric power management circuit 25 is housed, the serial line interface 21 of its output difference attachment plug and the power end of embedded scm 22, this electric power management circuit is responsible for converting the supply power voltage that serial port chip and single-chip microcomputer and chip can be provided to from the power supply of independent power input 24 input 5V ~ 12V.

Referring to Fig. 1, in the twin shaft step motor control system, this motion control plug 2 receives in the instruction process that host computer 1 sends by serial line interface 21 (see figure 2)s, and different command content represent different motion descriptions.The embedded scm 22 that is contained in motion control plug 2 inside is according to different instructions, calculate distance, direction, initial frequency, highest movement frequency, operation accelerating time and acceleration curve that stepping motor operation needs, and two

output

23A, 23B by the stepping motor output plug are transported to A, B

stepper motor driver

3 and 4 respectively; When embedded scm 22 receives the interpolation instruction, by the computing of interpolation operation software kit, finish diaxon or multi-shaft interlocked motion decomposition, calculate distance, direction, initial frequency, highest movement frequency, operation accelerating time and the acceleration curve of the stepping motor needs that will carry out the interpolation operation, and, control A, B stepping motor and telecontrol equipment 5 and 6 thus by A, B

stepper motor driver

3 and 4 that output 23A, 23B are transported to correspondence.

Fig. 3 has provided a kind of circuit theory diagrams that are used to control the motion control plug of twin shaft stepping motor:

It will be connected on T-OUT above the RS232 serial ports conversion chip (Max202) 212, the R-IN pin by being installed in pins 2 (RXD), 3 (TXD) correspondence above the 9 core RS232 serial interface plugs 211 on the circuit board, with on the pin R-OUT of RS232 serial ports conversion chip 9, RXD that T-IN pin correspondence is connected on embedded scm (LPC932A1) 22, the TXD pin, so just finished the conversion of embedded scm and host computer communication level then.

Delivery outlet P1.0, P1.1, P1.2, P1.3, P1.4, P1.5, P1.6, the P1.7 of embedded scm 22 is connected stepping motor output 23A and above the 23B, P1.0 is as X-axis step-by-step impulse output; P1.1 is as the X-direction level output end; P1.2 is as X-axis electrical power gating output; P1.3 is as X-axis semi-fluid control output end; P1.4 is as Y-axis step-by-step impulse output; P1.5 is as the Y direction level output end; P1.6 is as y-axis motor energising gating output; P1.7Y axle semi-fluid control output end.

Delivery outlet P0.0, the P0.1 of embedded scm 22 is connected stepping motor output 23A and above the 23B, PO.0 is as X limit switch input, P0.1 is as Y limit switch input.

Introduce working power by power input 24,, operating voltage is converted to the 3.3V operating voltage of embedded scm 22 and RS232 serial ports conversion chip 212 by electric power management circuit (1117) 25.

Claims

1, a kind of stepping motor motion control plug is characterized in that: it comprises the serial line interface be made up of serial interface plug and serial ports conversion chip, embedded scm and a block power supply managing chip; Described serial interface plug externally is connected with host computer, internally connects embedded scm by the serial ports conversion chip, and the motion control instruction that host computer is sent is sent to embedded scm; Described embedded scm converts the motion control instruction that receives to step motor control pulse and control level by internal processes, connect stepping motor output control plug by its step-by-step impulse output, traffic direction output, semi-fluid control output end, driver gating output, step-by-step impulse, direction, semi-fluid control, driver gating signal are flowed to stepper motor driver; The output of described power management chip connects the power end of serial ports conversion chip and embedded scm respectively.

2, stepping motor motion control plug according to claim 1 is characterized in that: described serial line interface is selected RS232 mouth, 485 mouthfuls or USB interface for use, is integrated in embedded scm inside.

3, stepping motor motion control plug according to claim 1 and 2 is characterized in that: draw an I/O mouth as the mechanical limit switch input on embedded scm, be connected with external mechanical limit switch.