I. Overview The heavy-duty floor-type CNC milling and boring machine is a machine-, electricity-, and liquid-integrated, technology-intensive product. Its performance requirements can achieve five-axis control and can process large-scale workpieces with complex surfaces. It belongs to the high performance and high efficiency in the machining industry. Key precision equipment with higher accuracy. At present, the electronic control part of such products basically relies on foreign imports. Localization can be achieved on the premise of ensuring performance. In particular, adopting a domestically-adopted all-digital servo control system can significantly reduce costs, break foreign monopoly and restrictions on technology, and promote the development of national industry. After the use of Time Technology servo products by a large-scale machine tool factory in a country, the installation and commissioning of the new vertical floor boring and milling machine TJ6916F was officially completed and delivered to users in March 2004 after nearly one year of design and trial. Second, project introduction The floor boring and milling machine TJ6916F (see Fig. 1) was designed on the basis of the mechanical structure of the original simple CNC floor boring and milling machine TJ6916. The feed axis requires a three-phase asynchronous motor with a wide range of speeds of 0.3 to 1800 rpm through analog speed control to meet the machining requirements of high-speed feed, low-speed cutting, and low-speed jog-cutting. Therefore, electrical products with low-speed stability and low-speed and high-torque output capability under the premise of wide-range speed control can meet the application requirements of this boring and milling machine. Ø Speed ​​control accuracy ± 0.04%, speed range up to 1:25000 (0.01Hz-250Hz). Ø Constant torque output below rated motor speed (torque control range 0-300% motor rated torque, accuracy ±5%) Constant power output above the rated speed. With low speed and high torque output, zero speed torque retention function. Ø It has good acceleration and deceleration control function and fast speed response. (1) Mechanical Design The characteristics of time servo low speed and high torque can meet the requirements of low speed machining of this type of machine tool, and can achieve the performance of mid-range imported servo with the same power level. It is not necessary to adopt the complex speed reduction mechanism of simple numerical control boring and milling machine, and it is based on the imported numerically controlled boring and milling machine. Mechanical structure and IMS series servo controller speed range, the motor directly drives the screw through a deceleration to drive the feed axis to move. This maximises the machine structure and eliminates transmission errors. (2) System connection According to the requirements of the machine for the drive system, the four feed axes share the same potentiometer and are switched by the relay. Designed with high (+10V) and low (approx. 20mV) regulation circuits and a zero (0V) regulation circuit. Feed axis fast forward speed corresponds to potentiometer high voltage, and slow feed speed corresponds to potentiometer low voltage. (3) Programming The main function of the feed motor is realized by writing the motor control language QMCL dedicated to the time servo controller. After receiving the enable signal, the motor is powered on. When there is a direction signal, the corresponding frequency control motor is output according to the input analog quantity (0 to 10 VDC). Operation; according to the voltage input of the machine's feed axis low level circuit, the feed axis is controlled to run smoothly at the lowest speed to meet the requirements of low-speed machining and tool setting; through two analog output (0 ~ 5VDC) external ammeter and tachometer, To display the current motor speed and current. (4) Hardware Configuration A total of four controllers and motors are used for the four feed axes. The specific hardware configuration is as follows: name Model/Specifications Quantity Note Servo controller IMS-DCT47P5S 2 Servo controller IMS-DCT4015S 2 Motor 15kw 2 4P/1500rpm Motor 7.5kw 2 4P/1500rpm Encoder 2500 line 4 Braking resistor 40 Euro/2500W 4 Two parallel groups Braking resistor 50 euro/1100W 2 Third, evaluation The floor-mounted boring and milling machine TJ6916F was assembled and was normally operated after joint debugging by the machine tool factory and the time company. And by the user's test, in the speed range, speed accuracy, speed response, fast feed and low speed feed to meet the performance requirements of the same category of machine tools, some test data are as follows: main indicators Axis Ram Column Headstock Travel (m) 1.2 1.6 6 3 Motor power (KW) 7.5 7.5 15 15 Minimum feed rate (rpm) 0.5 0.9 1.2 1.5 Note: Motor (4 pole), speed range: 0.01 ~ 60Hz (continuously variable), rated speed: 1500rpm. 1.27mm (0.050") Pitch Female Headers
Industrial and Automotive Control and Test
1.27mm Right-angle Dual Row female header, 1.27mm SMT Single row female header, 1.27mm SMT Dual row female header and 1.27mm Elevated Dual Row female Header are Antenk`s SMT female headers.
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Like the 1.27mm pitch male header, the 1.27mm pitch female header is used in densely-packed devices, requiring space-saving connections. The low profile, 1.27mm pitch female header addresses the need for connecting a variety of board-to-board configurations, with vacuum pick and place that makes it suitable for high volume automated manufacturing. It can be available in varying elevated stack heights, pass-through, rugged, high-density, and in numerous low-cost designs.
Antenk offers 1.27mm pitch female headers in either SMT or THM orientation at high quality and affordable China-quoted price that snuggly fits with the pins of a male header and acts as a receptacle.
Assembly and service is simple with either vertical (straight), elevated or at a right angle orientation, which can dissipate current of about 1.0 A or less in a tape and reel packaging. The filleted corners can also remove shadowing allowing optimization of LED output.
The 1.27mm pitch female headers are commonly found in PC`s and are also made to work in Arduino boards, Arduino Pro and Arduino Mega with either single or double-row female headers, facilitating connections for programming and incorporation into other circuits. They have the perfect height for clearing the USB-B connector and great for stacking multiple shields.
Female header always called as [Header connector", Antenk provide widely range of header connector, from 2.54mm (.100″ inch) pitch to 1.0mm (.039″ inch) pitch. The number of pins (contacts) is from 2 to 40 pins per orw. There are three type: Straight (Dip Vertical), Right angle, SMT (surface mount).
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Applications of 1.27mm Pitch Female Headers
Its small size is most suitable for PCB connections of small equipment and devices such as:
Arduino Boards
Architectural and sign lighting
Retail and display lighting
Fluorescent LED retrofit lighting
Cabinet or furniture lighting
Commercial / residential cove lighting
WiFi equipment
Gaming consoles,
Measurement instruments
Medical Diagnostic and Monitoring equipment
Communications: Telecoms and Datacoms
At one side of this female header is a series of pins which can either be mounted and soldered directly onto the surface of the PCB (SMT) or placed into drilled holes on the PCB (THM).
Through-Hole (Poke-In)
Best used for high-reliability products that require stronger connections between layers.
Aerospace and military products are most likely to require this type of mounting as these products experience extreme accelerations, collisions, or high temperatures.
Useful in test and prototyping applications that sometimes require manual adjustments and replacements.
1.27mm vertical single row female header, 1.27mm vertical dual row female header, 1.27mm Elevated single row female header, 1.27mm Elevated dual row female Header, 1.27mm right-angle single row female header and 1.27mm right-angle dual row female header are some examples of Antenk products with through-hole mount type.
Surface-Mount
The most common electronic hardware requirements are SMT.
Essential in PCB design and manufacturing, having improved the quality and performance of PCBs overall.
Cost of processing and handling is reduced.
SMT components can be mounted on both side of the board.
Ability to fit a high number of small components on a PCB has allowed for much denser, higher performing, and smaller PCBs.
Soldering SMT female connectors can be done at a maximum peak temperature of 260°C for maximum 60 seconds.
Pin-Type: Vertical (Straight) and Right-Angle
1.27mm pitch female headers may be further classified into pin orientation as well, such as vertical or straight female header or right-angle male header.
Vertical or Straight Female Header Orientation
One side of the series of pins is connected to PCB board in which the pins can be at a right-angle to the PCB surface (usually called "straight" or [vertical") or.
Right-Angle Pin Female Header Orientation
Parallel to the board's surface (referred to as "right-angle" pins).
Each of these pin-types have different applications that fit with their specific configuration.
PCB Connector Stacking
Profile Above PCB
This type of configuration is the most common way of connecting board-to-board by a connector. First, the stacking height is calculated from one board to another and measured from the printed circuit board face to its highest insulator point above the PCB.
Elevated Sockets/Female Headers
Elevated Sockets aka Stacked sockets/receptacles or Mezzanine are simply stacked female headers providing an exact distance requirement between PCBs that optimizes electrical reliability and performance between PCB boards.
Choosing this type of stacking configuration promotes the following benefits:
Connector Isolation - the contacts are shrouded preventing cable connection mishaps and good guidance for the mating header connectors.
For off-the-shelf wireless PCB module, stacking height is optimized with elevated sockets.
Offers superior strength and rigidity.
Polarisation prevents users from inverted insertion.
Single, Dual or Multiple Number of Rows
For a 1.27mm straight or vertical female header, the standard number of rows that Antenk offers ranges from 1 to 2 rows. However, customization can be available if 3 ,4 or n number of rows is needed by the customer. Also, the number of contacts for the single row is about 2-40 pins while for dual row, the number contacts may vary from 2-80 pins.
Pin Material
The pins of the connector attached to the board have been designed with copper alloy. With customer`s demand the pins can be made gold plated.
Custom 1.27mm Pitch Female Headers
Customizable 1.27 mm pitch female headers are also available, making your manufacturing process way faster as the pins are already inserted in the headers, insulator height is made at the right size and the accurate pin length you require is followed.
Parts are made using semi-automated manufacturing processes that ensure both precision and delicacy in handling the headers before packaging on tape and reel.
Tape and Reel Packaging for SMT Components
Antenk's SMT headers are offered with customizable mating pin lengths, in which each series has multiple number of of circuits, summing up to a thousand individual part number combinations per connector series.
The tape and reel carrier strip ensures that the headers are packaged within accurately sized cavities for its height, width and depth, securing the headers from the environment and maintaining consistent position during transportation.
Antenk also offer a range of custom Tape and reel carrier strip packaging cavities.
Time servo system applied in floor boring and milling machine
IMS Series Servo Controller Features