This document presents the design of a universal door position device for a heavy duty portal carriage and wagon wheel lathe. The device uses electronic circuits and sensors to ensure the lathe door is closed before cutting operations begin for safety. It describes the existing unsafe conditions, proposed safety system components like input sensors, logic circuits, output signals and a buzzer, and applications for the design in improving lathe safety and preventing injuries. PCB design and circuit diagrams are provided, along with potential other uses of similar safety systems.
The goal of any engineer designing a 3-phase inverter for an AC Brushless motor is to quickly get a running solution, tuned to his specific motor. An ideal design tool fulfilling this dream would enable automatic measurement of the motor parameters; ensure tuning of the system power stage; calibrate the coefficients of the Proportional/Integral current regulation block and guarantee a safe and reliable start-up process. Renesas are now offering such a dream tool as an enhancement to their existing RL78/G14, RX220, RX62T/RX63T Motor Control Reference platforms currently available. The enhancements to the Motor Control kits enable design engineers to plug-in and tune their own motor within a few minutes, allowing speedy and efficient system optimisation.
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The goal of any engineer designing a 3-phase inverter for an AC Brushless motor is to quickly get a running solution, tuned to his specific motor. An ideal design tool fulfilling this dream would enable automatic measurement of the motor parameters; ensure tuning of the system power stage; calibrate the coefficients of the Proportional/Integral current regulation block and guarantee a safe and reliable start-up process. Renesas are now offering such a dream tool as an enhancement to their existing RL78/G14, RX220, RX62T/RX63T Motor Control Reference platforms currently available. The enhancements to the Motor Control kits enable design engineers to plug-in and tune their own motor within a few minutes, allowing speedy and efficient system optimisation.
International Fiber Systems 251DR1BX3 Data SheetJMAC Supply
Buy the International Fiber Systems 251DR1BX3 at JMAC Supply!
https://www.jmac.com/IFS_International_Fiber_Systems_251DR1BX3_p/ifs-251dr1bx3.htm?=slideshare
The main objective of this project is controlling speed of BLDC motors with the help of microcontroller. To make the industry automation the equipment and machineries should be controlled automatically. So control of the machineries which involving this motor can be done accurately. It displays its speed using an IR method of speed sensor mechanism.
Kemet webinar - Expanding to 75V automotive gradeIvana Ivanovska
Are you a designer looking for Automotive Capacitor alternatives? The existing full AEC-Q200 qualified series T598 (125ºC) and T599 (150ºC) from KEMET can help to provide better capacitance stability, better capacitance retention, lower ESR, higher ripple handling, and long life. Check out KEMET´s latest releases in High Voltage Automotive Polymer Capacitors (T598 series). With rated voltages up to 75V applications like the 48V boardnet can benefit from Polymer advantages like High Volumetric efficiency, reduced Board Space & Piece Count, mechanical robustness as well as extended lifetime.
This session provides insight into the operation of electric motor drive systems. Topics include electric motor operation and construction, motor control strategies, feedback sensors and circuits, power and isolation, and challenges of designing highly efficient motor control systems. A new high performance servo control FMC board will be introduced in the presentation, which provides an efficient motor control solution for different types of electric motors, addresses power and isolation challenges, and provides accurate measurement of motor feedback signals and increased control flexibility due to FPGA interfacing capabilities. The motor control hardware platform will be used to demonstrate rapid prototyping of motor control algorithms using Xilinx base platforms and the MathWorks development and simulation tools.
Ls catalog thiet bi dien pro mec_vcb_general catalog_e_0902_dienhathe.vnDien Ha The
Khoa Học - Kỹ Thuật & Giải Trí: http://phongvan.org
Tài Liệu Khoa Học Kỹ Thuật: http://tailieukythuat.info
Thiết bị Điện Công Nghiệp - Điện Hạ Thế: http://dienhathe.org
The main objective of this project is controlling speed of BLDC motors with the help of microcontroller. To make the industry automation the equipment and machineries should be controlled automatically. So control of the machineries which involving this motor can be done accurately. It displays its speed using an IR method of speed sensor mechanism.
Kemet webinar - Expanding to 75V automotive gradeIvana Ivanovska
Are you a designer looking for Automotive Capacitor alternatives? The existing full AEC-Q200 qualified series T598 (125ºC) and T599 (150ºC) from KEMET can help to provide better capacitance stability, better capacitance retention, lower ESR, higher ripple handling, and long life. Check out KEMET´s latest releases in High Voltage Automotive Polymer Capacitors (T598 series). With rated voltages up to 75V applications like the 48V boardnet can benefit from Polymer advantages like High Volumetric efficiency, reduced Board Space & Piece Count, mechanical robustness as well as extended lifetime.
This session provides insight into the operation of electric motor drive systems. Topics include electric motor operation and construction, motor control strategies, feedback sensors and circuits, power and isolation, and challenges of designing highly efficient motor control systems. A new high performance servo control FMC board will be introduced in the presentation, which provides an efficient motor control solution for different types of electric motors, addresses power and isolation challenges, and provides accurate measurement of motor feedback signals and increased control flexibility due to FPGA interfacing capabilities. The motor control hardware platform will be used to demonstrate rapid prototyping of motor control algorithms using Xilinx base platforms and the MathWorks development and simulation tools.
Ls catalog thiet bi dien pro mec_vcb_general catalog_e_0902_dienhathe.vnDien Ha The
Khoa Học - Kỹ Thuật & Giải Trí: http://phongvan.org
Tài Liệu Khoa Học Kỹ Thuật: http://tailieukythuat.info
Thiết bị Điện Công Nghiệp - Điện Hạ Thế: http://dienhathe.org
Sustainable Nutrition Manual presentation for clearance (result = endorsed!)Stacia Nordin
Presentation to the Malawi Agriculture Technical Clearing Committee which, after discussion, resulted in Endorsement of the revised Sustainable Nutrition Manual. Coming your way soon! Publishing process now underway.
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Khoa Học - Kỹ Thuật & Giải Trí: http://phongvan.org
Tài Liệu Khoa Học Kỹ Thuật: http://tailieukythuat.info
Thiết bị Điện Công Nghiệp - Điện Hạ Thế: http://dienhathe.org
Catalog LS, Catalog,
Catalog Thiết Bị Điện LS, Catalog Thiết Bị Điện,
http://dienhathe.com,
Chi tiết các sản phẩm khác của LS tại https://dienhathe.com
Xem thêm các Catalog khác của LS tại https://dienhathe.info
Để nhận báo giá sản phẩm LS vui lòng gọi: 0907.764.966
1. By: Thobekile Ndabeni
Supervisor : V.S. Malaza
Transnet Engineering
coordinator : Mr. PR Tjale
Cape Peninsula University of Technology
13 October 2014
Heavy Duty Portal Carriage and Wagon
Wheel Lathe
Universal Door Position device of a :
Practical Training 2 Technical presentation
2. Introduction
Purpose of Presentation
Unsafe Environment
Portal after Operation
Injuries associated with the Lathe machine
Standard Operating Procedure
System flow diagram
Logic circuit
Main switch /Start Button (Input signal)
Door switch (Input signal)
Timer circuit
Protection Device
Voltage rectification
DC Voltage regulation
Output signal LED lights(Output signals)
Buzzer
Complete Circuit Diagram
PCB Design
Other uses
Motion and Light sensitive switches
Conclusion
References
Questions?
Friday, August 12, 2016Transnet Rail Engineering ,a Business Unit of Transnet Limited 2
Topics to be discussed
3. One of the important factors we always discuss is the
safety factor .It is very important to invests to safety
devices as they may help to save lives, loss of limbs,
eye sight , hearing and money.
Friday, August 12, 2016Transnet Rail Engineering ,a Business Unit of Transnet Limited 3
Introduction
4. To provide safer working environment
To introduce effective methods using safety electronic devices.
To develop standard, policies, procedures and guidelines for the
implementation of Safety management systems.
To motivate investment in Safety training and on-going awareness for
all employees , contractors and visitors.
Friday, August 12, 2016
Transnet Rail Engineering ,a Business Unit of Transnet Limited 4
Purpose of the design
5. The Machine was Manufactured in 1976.
It lacks the installation of safety devices.
Under operation small particles that are cut from the wheel, find a way to fly
out of proportion.
Proper PPE is required for this machine.
Copying slides are provided which will act as a bearer.
Friday, August 12, 2016Transnet Rail Engineering ,a Business Unit of Transnet Limited 5
Unsafe Environment
Pictures Curtsey of Willison & O'Regan 2006)
6. Friday, August 12, 2016Transnet Rail Engineering ,a Business Unit of Transnet Limited 6
Portal after operation
7. Friday, August 12, 2016Transnet Rail Engineering ,a Business Unit of Transnet Limited 7
Injuries associated with the lathe
machine
8. 1. Wheel set to be rolled into the machine.
2. Drivers to be set to the chucking diameter
3. The suitable profile template to be set.
4. All selector switches to be set to “Automatic sequence”.
5. The keys of the keyboard to be actuated according to the figures of the
measuring sheet for diameter and lateral correction.
6. Starting Push Button to the Actuated
The following steps are represented by the flow diagram below.
a) The tool blocks to be positioned (Automatically)
b) The tool block to be laterally positioned(Manually)
c) The copying slides to be traversed
d) The main driving system and the feeder mechanism to be switched on.
e) tool block return to their initial position.
f) The wheel set to be unchecked to be lowered to rest on the rail
Friday, August 12, 2016Transnet Rail Engineering ,a Business Unit of Transnet Limited 8
Standard operating Procedures
9. Transnet Rail Engineering ,a Business Unit of Transnet Limited 9
System Flow Diagram Start
Machine
ON?
Green Light
ON
copying
slides
Closed?
Orange Light
ON
Start
Cutting?
Red Light ON
END
Green Light ON
Start
Cutting?
Flashing Red Light ON
YES
YES
YES
NO
NO
NO
NO
YES
Friday,August12,2016
Friday, August 12, 2016
11. This switch is to switch the device ON/OFF
STDP switch Is employed
It is coupled to the Machines Main switch.
Friday, August 12, 2016Transnet Rail Engineering ,a Business Unit of Transnet Limited 11
Main switch of the device
Cont….
220Vac
STDP
Switch
Machine
ON/OFF
Device
ON/OFF
12. Friday, August 12, 2016Transnet Rail Engineering ,a Business Unit of Transnet Limited 12
……END
Pictures Curtsey of Composites/Nano Engineering ,2004)
13. The duty cycle = 75 %.
Frequency =0.7 Hz
Vout =9 V
Components Calculations
t1=D*T=0.75*1.33= 1s
t2=T-t1=1.33-1 =0.33s
R2=t2/(0.693*C1)=0.33/(0.693*1µ)=476KΩ
R1=(t1/(0.693*C1))-R2 =(1/(0.693*1µ))- 476K=967KΩ
Friday, August 12, 2016Transnet Rail Engineering ,a Business Unit of Transnet Limited 13
Timer Circuit
Cont….
14. Fuse Selection
Power(heat)Dissipation fuse
normal operating Current : 2A
Break Down Current :2.7 A(135% of 2A)
operating voltage :220-240Vac,50Hz
Ambient Temperature: -15°C to 30°C
PCB Considerations : thru-hole mounted
Friday, August 12, 2016Transnet Rail Engineering ,a Business Unit of Transnet Limited 14
Protection Device
Pictures Curtsey of Hans & Jos. Kronenberg ,2004)
15. Friday, August 12, 2016Transnet Rail Engineering ,a Business Unit of Transnet Limited 15
Voltage Rectification
……END
We will utilise the 220Vac.
Internal power supply
Follow SABS standards :SANS 10142-1:2008
Used Full bridge Rectification.
Rectify 220Vac to14VDC
16. A 12VDc voltage source is utilized in this entire circuit.
The voltage is regulated so it provides a fixed output
voltage
Model RG178L12 ;14VDC to 12VDC (100mA max)
Friday, August 12, 2016Transnet Rail Engineering ,a Business Unit of Transnet Limited 16
DC Voltage Regulation
INPUT:14VDc.
From Rectifier
OUTPUT:12VDC(100mA)
To Circuit
Cont….
17. affordable
energy saving properties
Operates at low DC voltages
Easy to install and maintain
Has adequate output wattage as per job required.
Friday, August 12, 2016Transnet Rail Engineering ,a Business Unit of Transnet Limited 17
Low voltage LED lights
Cont….
18. Friday, August 12, 2016Transnet Rail Engineering ,a Business Unit of Transnet Limited 18
Low voltage LED lights
….END
Pictures Curtsey of Hans & Jos. Kronenberg ,2004)
19. Operates at a range of 8m in radius
operates only when the wheels are being cut ,with the
door being opened .
A 500 ohms pull-up Resistor is employed.
Ratings: 12Vdc,80Db,20mA
Friday, August 12, 2016Transnet Rail Engineering ,a Business Unit of Transnet Limited 19
Buzzer Circuit
Pictures Curtsey of Williams JD, Wahab M, Wang W,2001;Pg102)
20. Friday, August 12, 2016Transnet Rail Engineering ,a Business Unit of Transnet Limited 20
Complete Circuit Diagram
21. PCB wizard 3
Physical dimensions: 80x80 mm
Grid : 0.100 mm grid with 0.060 mm track
Minimum spacing: 3 mm
Isolation Gap : 2 mm
Friday, August 12, 2016Transnet Rail Engineering ,a Business Unit of Transnet Limited 21
PCB Design
Power Rectification PCB Logic PCB
22. Car doors
Industrial and household fridges
Earth switches
Automated Lighting systems
Alarm system
Friday, August 12, 2016Transnet Rail Engineering ,a Business Unit of Transnet Limited 22
Other uses
23. operates at 11 to 16 Vdc
Range : 0.2m to 3.5m
Speed:0.18 m/s to 3.4m/s walking speed
Operating Temperature :-20°C to +50°C
maximum current consumption 15mA
Installation Heights: 2.1m to 2.7m
Output: Relay type 100mA/28Vdc, N.C.
Friday, August 12, 2016Transnet Rail Engineering ,a Business Unit of Transnet Limited 23
Motion Sensors
Pictures Curtsey of Williams JD, Wahab M, Wang W,2001;Pg111)
24. SPECIFICATION
Power source: 220V-240V/AC Power Frequency: 50Hz
Rated Current: 10A Ambient Light: <<5-50LUX(adjustable)
Working Temperature: -20~+40° C Working Humidity: <93%RH
Friday, August 12, 2016Transnet Rail Engineering ,a Business Unit of Transnet Limited 24
Light sensitive switches
Pictures Curtsey of Baton Rouge, LA,2001, Pg 99 )
25. The use of safety electronic equipment is of great
essence ,as it maximises the safety aspects and
enforces the implementation of safety operating
procedures in the working environment.
Friday, August 12, 2016Transnet Rail Engineering ,a Business Unit of Transnet Limited 25
Conclusion
26. Subject to technical alterations ,Hans & Jos. Kronenberg GmbH,pge111
Microstructures: Concepts of Fatigue and Fracture Parameters,” To be presented
at the
Eleventh International Conference on Composites/Nano Engineering (ICCE-11), Hilton
Head, SC (2004).
780 Industrial Blvd., St-Eustache (Quebec) J7R 5V3 South Africa
Williams JD, Wahab M, Wang W, “Fracture Mechanics Aspects of LIGA
Relays,” Proceedings of the International Symposium on Test and Measurement, 1:
1-9 (2001).
Friday, August 12, 2016Transnet Rail Engineering ,a Business Unit of Transnet Limited 26
References
27. Friday, August 12, 2016Transnet Rail Engineering ,a Business Unit of Transnet Limited 27
Questions