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Thermostat Control Using A Galil RIO PLC August 6, 2014

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Many applications need to hold a specific temperature for long periods of time.  With conventional cooling systems, a compressor is used to remove heat from the chamber and bring the temperature down.  The RIO Programmable Logic Controller is capable of controlling high precision refrigeration units with a simple thermostat style loop.

See Application Note at:
http://www.galilmc.com/support/appnotes/miscellaneous/note5524.pdf

More information on RIO Programmable Logic Controller from Galil can be found at the link below-

http://www.servo2go.com/product.php?ID=102190&cat=

For more information, please contact:

Editorial Contact:

Warren Osak
sales@servo2go.com
Toll Free Phone:  877-378-0240
Toll Free Fax:   877-378-0249
www.servo2go.com

Tags:  Galil, Galil Motion Control, RIO, PLC, Pocket PLC, Servo2Go, Thermostat Control, Programmable Logic Controller

Instructional Video: Manual Commutation of a BLDC Motor with an Analog Brushless Servo Drive July 2, 2014

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Advanced Motion Controls 5:46 min YouTube Video.  

Instructions on how to manually commutate a brushless servo motor by trying all 6 wiring combinations.

The servo drive is an AMC BX25A20AC and the motor is NEMA 34 BLDC servo motor.  Servo drives from ADVANCED Motion Controls are designed to operate with a wide range of motor types, configurations and manufacturers.  Some basic specifications for the BX25A20AC are that it accepts 120VAC single phase supply, outputs 25A peak and 12.5A continuous and works in current mode, open loop mode and velocity mode. 

For more information on the AMC Servo Drive Product Family, click on the link below:

https://www.servo2go.com/supplier.php?id=1031080098

For more information, please contact:

Editorial Contact:

Warren Osak
sales@servo2go.com
Toll Free Phone:  877-378-0240
Toll Free Fax:       877-378-0249
www.servo2go.com

 

Tags:  AMC, Servo2Go, Advanced Motion Controls, Brushless Amplifier, PWM Amplifier, Servo Drive, Servo Amplifier, Analog Brushless Amplifier, Analog Servo Drive

 

What is meant by Rotary Incremental Encoder Index Pulse “gating”? June 11, 2014

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Quantum Devices Optical Encoder

Quantum Devices Optical Encoder

Gating refers to the width of the Z (index) pulse relative to the A and B channels. With ungated devices the edges of the Z pulse have no hard relation to A & B.

Gating to channel A, requires the Z pulse to be high once per revolution and only when A is high.

Gating to channels A&B high requires the Z pulse to be high once per revolution and only when A AND B are high.

Gating to A creates a Z pulse roughly 180 Electrical Degrees in duration while gating to A&B creates a Z pulse roughly 90 Electrical Degrees in duration.

Gating to a smaller duration increases the precision of the Z pulse, but also requires the motion system to be able to read the Z channel at a faster rate.

Gating is sometimes required by certain drive/amplifier/controller manufacturers.

QD145 Z (Index Pulse) Specifications:

incremental-encoder-gating1
Ungated Z
Z-A/A-Z min = 0 Electrical Degrees
Z-A/A-Z max= 225 Electrical Degrees
Z width min = 180 Electrical Degrees
Z width Max = 540 Electrical Degrees

Z Gated to A
Z width min = 135 Electrical Degrees
Z with max = A true

Z Gated to A&B
Z width min = 45 Electrical Degrees
Z width Max = A&B true

incremental-encoder-gated1

Ungated Z
Z true over A&B> 45 Electrical Degrees
Z-A&B/A&B-Z min = 0 Electrical Degrees
Z-A&B/A&B-Z max= 315 Electrical Degrees
Z width min = 180 Electrical Degrees
Z width Max = 540 Electrical Degrees

Z Gated to A
Z width min = 135 Electrical Degrees
Z with max = A true

Z Gated to A&B
Z width min = 45 Electrical Degrees
Z width Max = A&B true

More information on ‘Quick Ship’ Industrial Rotary and Modular Shaft Encoders can be viewed at-

http://servo2go.com/supplier.php?id=1057843244

For more information please contact:

sales@servo2go.com
Toll Free Phone:   877-378-0240
Toll Free Fax:       877-378-0249
www.servo2go.com

 

Tags:  Encoder, Incremental Encoder, Absolute Encoder, Single-Ended Encoder, Differential Encoder, Servo2Go, Quantum Devices

 

 

Why are Hypoid Gearboxes Ideal for Right Angle Applications? June 3, 2014

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This example will compare a traditional planetary bevel gearbox (left) with a hypoid gearbox (right), in a 5:1 gear reduction ratio.

Planetary Bevel Gearbox
By construction, a planetary bevel gearbox is the combination of an input bevel gear stage and an output planetary gear stage.  In order to achieve any gear reduction ratio, this type of gearbox always requires two or three gear stages.  In this example, the first stage is a 1:1 bevel gear ratio and the second stage is a 5:1 planetary gear ratio.  For a 3,000 RPM application, the motor speed is continued throughout the entire first gear stage, which means the input bearings and seals, gears, and output bearings and seals are all rotating at 3,000 RPM.  The actual reduction doesn’t occur until the planetary gear stage.  Higher speeds throughout the gearbox means higher heat and can also result in a 50% service life de-rating for continuous applications.

Hypoid Gearbox

A hypoid gearbox on the other hand can achieve up to a 15:1 ratio with only a single gear stage.  In this 3,000 RPM application, the motor speed is immediately reduced to the final reduction speed of 600 RPM which is ideal for the gears, seals, bearings, and shaft.  A lower speed means less heat, which is important to maximizing the life and load carrying capabilities of the output bearings in a gearbox.  GAM’s Dyna Series hypoid gearbox has a 30,000 hour service life rating which is 50% more than a comparable planetary bevel gearbox.  In addition to the performance advantages of using a hypoid gearbox, there is also a substantial space saving benefit. In the example above, GAM’s hypoid gearbox is 46% more compact than the planetary bevel gearbox.

For additional information on the Hypoid Gearboxes from Gam, click on the link below-

https://www.servo2go.com/search.php?search=dyna series&D=PROD

For more information, please contact:

Editorial Contact:

Warren Osak
sales@servo2go.com
Toll Free Phone:  877-378-0240
Toll Free Fax:   877-378-0249
www.servo2go.com

Tags:  Gam, Gam Gear, Servo2Go, Gearbox, Gearboxes, Hypoid Gearbox, Dyna Series, Right Angle Gearbox, Hypoid Gearing

Free MotorSizing Software May 15, 2014

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Galil's MotorSizer Software

Galil’s MotorSizer Software

Galil’s MotorSizer is a free, web-based tool for easy sizing of your motion system.  This easy-to-use tool lets you specify your load and motion requirements for various mechanical systems.  MotorSizer performs a thorough analysis to select motors and amplifiers (or enter your own) that can drive your load to the motion requirements.  Galil‘s MotorSizer tool analyzes both stepper and servo motor systems.  MotorSizer is password protected (registration is required) and automatically saves your data for future reference.

Click on the link below to download the Free Motor Sizing Software:
http://www.galilmc.com/learning/motorsizer.php

Information on Galil’s Programmable Motion Controllers & Drives can be found at:
http://servo2go.com/supplier.php?id=1031080104

For more information, please contact:

EDITORIAL CONTACT:
Warren Osak
sales@servo2go.com
Toll Free Phone:  877-378-0240
Toll Free Fax:   877-378-0249
www.servo2go.com

 

Tags:  Galil, Galil Motion Control, Servo2Go, MotorSizer, Motor Sizing Software

 

Understanding Incremental Encoder Signals April 29, 2014

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Which incremental encoder wires should I use?

Channels A & B (Incremental Channels)

Use only A (or only B) for an RPM or counting applications where the rotation is either unidirectional, or where you don’t need to know direction.

Use A and B together to know direction.  After two low pulses the next high pulse indicates direction.  This is due to the phasing offset between A and B of 90 electrical degrees, placing the signals in what is known as quadrature.

These signals can also be used to set up an up/down counter.

Index pulse, also known as Z, marker, or I

Index pulse is a pulse that occurs once per rotation.  It’s duration is nominally one A (or B) electrical cycle, but can be gated to reduce the pulse width.

The Index (Z) pulse can be used to verify correct pulse count.

The Incremental Encoder Index pulse is commonly used for precision homing.  As an example, a lead screw may bring a carriage back to a limit switch.  It is the nature of limit switches to close at relatively imprecise points.  This only gives a coarse homing point.  The machine can then rotate the lead screw until the Z pulse goes high.

For a 5000 line count encoder this would mean locating position to within 1/5000 of a rotation or a precision of .072 Mechanical Degrees.  This number would then be multiplied against lead screw travel.

Commutation (UVW) signals are used to commutate a brushless DC motor.  I always like to compare these signals to that of a distributor in a car.  The commutation (sometimes called “Hall”) signals tell the motor windings when to fire

You would need to have encoder commutation signals if the motor you are mounting the encoder to has a pole count and there is no other device doing the work of commutation.  It is important to note that commutation signals need to be aligned or “timed” to the motor.

Single ended vs differential

These terms refer not to the waveforms of signals, but instead to the way the signals are wired.

Single ended wiring uses one signal wire per channel and all signals are referenced to a common ground.

TTL and Open Collector are types of single ended wiring.

Differential wiring uses two wires per channel that are referenced to each other.  The signals on these wires are always 180 electrical degrees out of phase, or exact opposites.  This wiring is useful for higher noise immunity, at the cost of having more electrical connections.

Differential wiring is often employed in longer wire runs as any noise picked up on the wiring is common mode rejected.

RS-422 is an example of differential wiring.
More information on ‘Quick Ship’ Industrial Rotary and Modular Shaft Encoders can be viewed at-

http://servo2go.com/supplier.php?id=1057843244

For more information please contact:

sales@servo2go.com
Toll Free Phone:   877-378-0240
Toll Free Fax:       877-378-0249
www.servo2go.com

Tags:  Encoder, Incremental Encoder, Absolute Encoder, Single-Ended Encoder, Differential Encoder, Servo2Go, Quantum Devices

Gearbox Design Helps to Prevent Motor Shaft Slippage April 10, 2014

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All GAM inline gearboxes feature a radial clamping collar as the connection method to secure the motor shaft.  We’ve had many customers call us and ask for a gearbox with a keyed input because they’ve had motor slipping issues while using other manufacturers’ gearboxes.  These other gearboxes have a set screw design to connect to the motor shaft.  Depending on the type of set screw used, the set screw either presses against or penetrates the motor shaft to generate the holding force.  While there can be many factors that can contribute to the motor shaft slipping, having the holding force come from a single point isn’t an optimal design.  A better option than a set screw or keyed connection uses a radial clamping collar.

With this design, the radial clamping collar compresses the gearbox input shaft and evenly distributes the clamping force around the entire circumference of the motor shaft.  The gearbox input shaft is sliced in three locations to ensure a secure connection even if the motor shaft has a key slot with the key removed. 

Not only does the radial clamping connection generate higher clamping forces, but it won’t mar the motor shaft like a set screw connection can.  And due to the design of the radial clamping collar, the gearbox input shaft has a smaller diameter, resulting in a lower moment of inertia compared to a gearbox with a set screw input.  This radial clamping design comes standard on all GAM inline planetary gear reducers even including the low cost PE series.

For additional information on the Gearbox & Coupling Products from Gam, click on the link below-

https://www.servo2go.com/supplier.php?id=1150206260

For more information, please contact:

Editorial Contact:

Warren Osak
sales@servo2go.com
Toll Free Phone:  877-378-0240
Toll Free Fax:   877-378-0249
www.servo2go.com

Tags:  Gam, Gam Gear, Servo2Go, Planetary Gearbox, Gearboxes, Inline Gearbox

Tips for Using Galil Optoisolated Outputs: A New 2-Minute Video from Galil April 1, 2014

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Tips for using Galil Optoisolated Outputs Video

Galil has recently added a new video to its growing library of 2-minute instructional videos.  This latest video gives recommendations for wiring and supply voltages when connecting to the optically isolated outputs on Galil controllers.  This video focuses on best practices for connecting the outputs between the controller and load, and for connecting an external power supply to assure true optical isolation is maintained.  Proper connections when using the various output options such as sourcing or sinking, supply voltages, and current ratings are discussed. Techniques for by-passing the optical isolation circuitry are also presented. >>Watch Video

Click on the link below to view Servo2Go’s family of Programmable Motion Controllers from Galil Motion Control.

http://www.servo2go.com/supplier.php?id=1031080104

EDITORIAL CONTACT:

Warren Osak
sales@servo2go.com
Toll Free Phone:  877-378-0240
Toll Free Fax:       877-378-0249
www.servo2go.com

Tags:  Galil, Servo2Go, Motion Control, Motion Controller, Motor Control, Automation, Servo System, Stepper System, Optoisolation, Video, Optoisolated Output

 

 

GAM Application Story – Complete Gearbox and Coupling Assembly for Actuator System March 11, 2014

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Industry:  Material Handling

Application Challenge:  A customer was looking to drive two ball screws in unison using a single motor and also needed gear reducers to meet the application requirements.  The ball screws were in parallel and positioned eight inches (8”) apart from their centerlines.

GAM Solution: A traditional arrangement for this system would include a center driven dual output shaft gearbox in between two right angle gearboxes and connected using couplings.  However, because the actuators were so close together, this configuration was not possible.  GAM engineers relocated the motor perpendicular to the actuators by using two spiral bevel gearboxes (V-Series) in conjunction with a hollow output inline gear reducer (EPL-H).  All components were assembled together with precision machined adapters and bellows couplings.  The design was approximately twenty percent (20%) shorter than the traditional configuration and used fewer and more economical components resulting in a fifteen percent (15%) reduction in cost.

Typically, the customer would have to size and source the gear reducers from one company, the couplings from another company, design the system, and then ensure that it functions correctly.  Instead, the customer was able to get the complete solution (everything between the motor and actuator) from GAM.   GAM engineers not only sized and selected the appropriate gear reducers and couplings required for the application but also designed the mounting adapters necessary to complete the system.  One 3D model of the assembly was sent to the customer so that all they had to do was drop the file into their design for sign off, which helped to reduce the overall design time.

Results: Single point sourcing. -15% reduction in system cost. -20% reduction in system length. -Eliminated unnecessary components. -Shorter design time.

GAM Linear Mount Products – For everything between the motor and actuator. GAM linear mount products are an innovative line of gearboxes, couplings, and mounting adapters designed to improve the process of connecting motors to actuators.  Whatever the challenge, GAM has the products and design competencies to help with any actuator application.

Click on the link below to download the catalog in PDF format.

.PDF version of the catalog can be found here.

For additional information on the Gearbox & Coupling Products from Gam, click on the link below-

http://www.servo2go.com/supplier.php?id=1150206260

For more information, please contact:

Editorial Contact:

Warren Osak
sales@servo2go.com
Toll Free Phone:  877-378-0240
Toll Free Fax:   877-378-0249
www.servo2go.com

Tags:  Gam, Gam Gear, Servo2Go, Linear Mount Products, Coupling, Couplings, Gearbox, Gearboxes

Mass, Force and Torque Equations February 10, 2014

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Reprint of Chapter 1 of the maxon Formulae Handbook, by Jan Braun

The Formulae Handbook lists the most important formulae in relation to the components of a complete electro-mechanical drive system.  Numerous illustrations and clear descriptions of the symbols on the respective pages makes it easy for the reader to understand the formulae.

Typical Component Forces in a Drive System

Typical Component Forces in a Drive System

This chapter focuses on Mass, Force and Torque Equations.

Click on the link below to down this chapter.

https://www.servo2go.com/support/downloads/Pages%20from%20Maxon%20Formula%20Handbook%2010-2012.pdf

For more information, please contact:

Editorial Contact:

Warren Osak
sales@servo2go.com
Toll Free Phone:  877-378-0240
Toll Free Fax:       877-378-0249
www.servo2go.com

Tags:  mass equations, force equations, torque equations