Tuesday, October 3, 2017

Thursday, September 28, 2017

New MACM - Centering Unit from:

SMC's new MACM contributes to space saving on conveyor lines.  Heavy workpieces can now be aligned and positioned with small cylinders, resulting in compact conveyor lines.

Maximum allowable load weight 2205 lbs


Workpieces can be moved in any direction:  forward/backward, right/left, at an angle, and even rotated (360 degrees).  Ball bearings allow for smooth operation.


Table center has a moveable range of 100mm Max (MACM10-50)


Application Example:  Conveyor Line

1.  Transferred workpieces are stopped
Workpieces transferred at an angle are stopped at an alignment point (stops where the centering unit is installed).
2.  Centering unit rises
Cylinder rises to lift the workpiece (separates roller conveyor from workpiece).
3.  Workpiece alignment/table lock
Alignment cylinder correct skewed workpieces and realigns them.  After alignment the table of the centering unit is locked to maintain the corrected position even after the adjustment cylinders are released.

4.  Centering unit descends/workpiece is transferred to next step
Cylinder descends, places workpiece back on the roller conveyor, and transfers it to the next step.

Additional information available in SMC's New Products Guide Vol. 4

Contact us today for more information.

Friday, November 18, 2016

Lowering Dew Point to Protect Expensive Automation Equipment

Failure to remove water vapor from factory air can quickly become a costly maintenance headache.

Water vapor and the resulting water condensate are the foremost causes of costly downtime and maintenance, not the more visible culprit of oil or contaminants, which are easily removed with proper filtration.

Moisture in facility airlines can cause corrosion, rust and pipe scale which can break loose to block or adhere to air passageways that can lead to increased pressure drop and loss in machine performance.

Aftercoolers, drip legs and water separators are used to remove water condensate from factory compressed air. However, this air is still at 100% relative humidity and is still at risk of condensing into water should the surrounding temperatures drop to its dew point.

In order to increase protection of expensive automation equipment, factory compressed air must remove as much water vapor as possible to avoid any condensation further downstream.

This is done by lowering its dew point.

How is Dew Point Lowered in Factory Compressed Air? 

Drying compressed air at the highest pressure consistent with the facility’s demands will result in the most economical dryer operation. For most industrial applications, the rule is to first set the pressure dew point to meet general requirements, then adjust it 20 °F lower than the facility’s lowest ambient temperature.

Hence, factory air dryness or dew point is relative to the application’s specific requirements.

SMC Refrigerated Dryer
Refrigerated dryers are the most common measure to lower dew point. A refrigerated dryer will further cool the compressed air by removing heat at its inlet side and lowering its temperature dew point down to 37 °F, then expelling the condensate through an automatic condensate drain. The dryer will then reheat the dried compressed air back to ambient temperature by recycling the previously removed heat using a heat exchange process. This reheating of the compressed air to ambient temperature will eliminate “sweating” cold pipes when working in humid factory conditions.

It is recommended that a coalescing filter be installed upstream from the refrigerated dryer to remove any compressor oil and other contaminants that may still be trapped in the compressed air to ensure the dryer’s proper functioning. Oil coating the cooling surfaces decreases efficiency while coalescing filters saturated with liquid water will reduce its drying capacity.

In circumstances where factory piping is exposed to ambient temperatures lower than the dew point achievable by refrigerated drying, alternate methods of drying must be considered.

SMC Membrane Dryers
Membrane dryers use hollow fibers composed of a macro molecular membrane through which water vapor passes easily, but is difficult for air (oxygen and nitrogen) to pass through. When humid, compressed air is supplied to the inside of the hollow fibers, only the water vapor permeates the membrane and is drawn to the outside due to the pressure differential between the moisture inside and outside the hollow fibers. The compressed air becomes dry air and continues to flow unimpeded out of the membrane dryer.

A portion of the dry air from the outlet side is passed through a very small orifice to reduce the pressure and purge the outside of the hollow fibers. The moisture that permeated to the outside of the hollow fibers is discharged to atmosphere by the purge air which in turn creates a low partial pressure allowing the dehumidification process to continuously perform.

By altering the air flow rate and membrane configurations, pressure dew points from +55 °F to -44 °F can be achieved. Membrane air dryers are a cost effective solution for point-of-use applications for pharmaceutical manufacturing, packaging, laboratory environments and other applications.

SMC Desiccant Dryers
Desiccant dryers pass air through beds of desiccant, an absorbent material such as silica gel or activated alumina, which adsorb water vapor to its surface to effectively lower dew points to temperatures well below that which a refrigerated dryer can achieve. Heatless regenerative models use a pair of desiccant beds which alternate in service while the off-line bed is regenerated via a pressure swing adsorption process. Pressure dew points from +16 °F to -40 °F and beyond can be achieved with a desiccant dryer.

Both membrane and desiccant dryers are adversely affected by the presence of oils or liquid water and must be protected with a quality coalescing filter.

What is the Appropriate Dew Point?

Over specifying an application’s or a facility’s dew point can be very costly due to exorbitant energy bills just as the maintenance costs for water vapor damage to product lines can be for an under specified dew point.

Drying the entire factory compressed air supply to -10 °F dew point is unnecessary and extremely wasteful. It is a sensible practice to dry the compressed air to a dew point 20 °F lower than the factory’s lowest ambient temperature then subdivide each compressed air supply by application using zone or point-of-use membrane or desiccant dryers to provide the appropriate level of dryness.

The costs of energy, downtime, replacing production components, end product defects or even loss of brand value are just a few factors to consider when determining an appropriate dew point.

For more on dryers and lowering your dew point, visit www.smcusa.com or contact Scott Equipment

Content from SMC Insider Best Practices 1.2

Wednesday, August 31, 2016

Hiwin Take 5

Now through the end of the year, mention Hiwin take 5, when you request a quote or place an order with Scott Equipment, and receive an extra 5% off your Hiwin guideway order.  If you need assistance crossing over a competitive product let us help.  Contact us to receive a quote or assistance in specifying your guideway.

About Hiwin Linear Guideway:
Linear guideways provide a type of linear motion that utilizes re-circulating rolling elements between a profiled rail and a bearing block.  The coefficient of friction on a linear guideway is only 1/50 compared to a traditional slide and are able to take loads in all directions.  With these features, a linear guideway can achieve high precision and greatly enhanced moving accuracy.  Hiwin Corporation offers multiple linear guideway series and each series features different options for sizes, loading capabilities, accuracy, and more.


 Special offer only valid for orders that are placed and scheduled for shipment with Scott Equipment Company, Inc. between 9/1/2016 and 12/31/2016.  The Hiwin Take 5 promotion will appear on quotes, orders, and invoices as a single order discount.  For example, if your order for Hiwin Guideway is $5,000, a line item “HIWIN TAKE 5 PROMOTION” with a negative sale amount of -$250 will appear on your order, invoice, and quote.  

Tuesday, August 23, 2016

Scott Equipment is thrilled to announce the addition of the Murrelektronik line of products.

Murrelektronik is your system partner to help reduce your wiring effort.

Control Cabinet
Murrelektronik views power management as the starting point
for machine efficiency. Power conditioning, properly sized power
supplies, current monitoring, redundancy and energy
savings are all considered when we assemble a power
management solution for our partners.

The combined technologies offered by Murrelektronik help you
to achieve a power management solution tailored to your
application, your budget and your peace of mind.

Filter – Power – Redundancy – Current Monitoring - Buffer :

all available from Murrelektronik

Interfaces
Signal transferring and processing happens all over in industrial
machine environments. Communicating the signals between the
cabinet and field is where Murrelektronik has multiple solutions
for creating the right interface for your application. Convenient
service outlets, space saving control panel interface, Ethernet
switches, and signal convertors are all available from
Murrelektronik. Combining our array of cabinet signal interface
products with the rest of our connectivity solutions will help to
improve machine reliability and serviceability.

Modlink MSDD | Modlight | MIRO GSM | Ethernet Switch

Fieldbus
With Murrelektronik‘s fieldbus technology you can connect
sensors and actuators conveniently and systematically to a higher
control level. This allows cost-effective installation and
automation solutions in machines and plants for many industries.

Murrelektronik offers solutions for any application. Our fieldbus
modules enable convenient and thorough diagnostics. While the
principle of “changing the bus without changing the system”
provides flexibility.

Cube20 | Cube20S | Cube67+ | Impact20 | Impact67 | MVK

Connectivity
Versatile, easy to use, interchangeable M12 connectors for
industrial applications reduce your wiring effort and ease
installations.

Murrelektronik offers a wide variety of M12 & M8 components in
several color and cable choices for your applications. Distribution
boxes are available to handle up to 16 signals. The cost effective
overmmolded cable design will simplify your wiring and replace
junction boxes.

M8 | M12 | Valve Plugs | Distribution Boxes | Field Wireables

For more information about Murrelektronik visit their webpage:  http://www.murrinc.com/

Contact Scott Equipment today to find out how Murr can help you reduce your wiring effort.

Wednesday, January 20, 2016

SMC Best Practices - Remove Water from Factory Air and Minimize Costly Downtime



 One of the foremost causes of costly downtime and emergency maintenance is not oil or contaminants, which are easily removed with proper filtration, but water vapor and the resulting condensed water that is trapped in factory compressed air.
Water in facility airlines can cause corrosion, rust and pipe scale which can break loose to block or adhere to air passageways that can lead to increased pressure drop and loss in machine performance.
 

Machine components will suffer premature wear and parts deterioration from water:

  • pneumatic cylinders will have their pre-lubricants washed away, corrode and respond slower
  • solenoid valves’ rubber seals will stiffen, become more susceptible to rupturing and leaking
  • instrumentation can malfunction even with the presence of a small amount of moisture/water
  • air powered tools will likely stick, jam and perform less efficiently

 

End products are also at risk of suffering from quality deterioration because of water:

  • spray painting will be adversely affected by change in color, adherence and finish quality
  • industrial ink-jet printers will be adversely affected by change in adherence and finish quality
  • blow molding plastic bottles’ viscosity and material consistency could be adversely affect
  • gluing / taping adhesiveness of cardboard boxes could be adversely affected
  • pharmaceuticals compound mixing and integrity could be adversely affected
  • food processing may be contaminated because of micro-organism growth
 

How does Water Vapor Enter Factory Compressed Air?

 
All atmospheric air contains various contaminants and water vapor which is concentrated during the compression process. The heat generated during compression increases the capacity of the compressed air to hold moisture, thus avoiding condensation inside the compressor. Lubricants used to improve the efficiency and life of the compressor also become part of the contaminant load as do wear particles.
 
A compressor with a 100 hp capacity, operating at 86 °F ambient temperature, a relative humidity of 80%, compressing air to 100 psi, can produce approximately 30 gallons of condensate during an eight hour shift.
 

Removing Liquefied Water from Factory Compressed Air

 
Aftercoolers
The compressed air exiting the compressor can reach temperatures as high as 300 °F, which is unusable for industrial applications. This hot, saturated air will release 70-80% of its excess water vapor if simply cooled to near room temperatures. To achieve this type of cooling and bulk moisture removal, air or water cooled aftercoolers are often employed. Condensed liquid is removed from the aftercooler via automatic condensate drains and disposed.
 
The air exiting the aftercooler will still be saturated but at a much more manageable temperature. Because the air is at a dew point of 100oF or more, it is still very vulnerable to further condensation into liquid water should it be exposed to temperatures lower than this dew point. The piping in most industrial facilities would provide such temperatures and opportunities for condensation as the air moves throughout the plant.
 
Drip Legs
The next line of defense for removing the water vapor saturated compressed air is a drip leg. A drip leg is a vertical pipe plumbed at the air drop line (below the horizontal header pipe) to allow for water to be easily and efficiently drained away using the principle of rapid air expansion, or adiabatic expansion, to condensate water vapor into liquefied water.

To broadly summarize adiabatic expansion, temperature is the average heat or kinetic energy of all the particles divided by a given volume of air; if the volume of air is increased through expansion, the heat is divided by a larger volume number, therefore decreasing the air temperature. If the drop in air temperature falls below its dew point, then a condensate will form.

The condensate is then removed by a drain at the bottom of the drip leg which can be automatically or manually drained to avoid overflow of contaminants.
 
Water Separators
Water separators will use mechanical separation techniques to remove condensed water in bulk from factory air either by directing inlet air into a spiral and using centrifugal force to separate the water out from the compressed air or by passing the inlet air through a special resin filter element with large meshes to trap water particles that will drop down to a collection bowl allowing the compressed air to pass through.
SMC’s AMG Series water separator is capable of removing water droplets up to a 99% water removal rate, using a special resin filter to trap water droplets. The AMG is easy to install and requires no electrical power and can be either a standalone unit or integrated in to a modular air prep system.

However, the AMG water separator is not designed to remove water vapor or lower dew point which will require a refrigerated air dryer or desiccant dryer.

For more on refrigerated air dryer or desiccant dryer, visit www.smcusa.com or contact Scott Equipment

Tuesday, July 14, 2015

New from SMC - Vacuum Pad with built on Ejector Series ZHP


SMC's new ZHP series vacuum pad with ejector saves space and reduces piping labor.  The two-stage ejector features a 50% increase in flow (over single stage ejectors) and a reduction in air consumption by 30%.

Other features:
  • One-touch fitting connection (4mm, 6mm, 5/32", 1/4")
  • Strainer
  • Built in silencer
  • Port for vacuum release, pressure sensor or daisy-chain piping
For additional information:
Contact Scott Equipment

Catalog Link
http://content2.smcetech.com/pdf/North_American_Catalog/SMC-ZHP-14-E632.PDF

Wednesday, June 17, 2015

New Whitepaper: Introduction to accuracy and repeatability in linear motion systems

Tolomatic

How accurate is an actuator?


The answer to this question is more than a number. Accuracy and repeatability are two important specifications of a linear motion platform. Though they are related, accuracy and repeatability in linear motion systems are not the same thing. The motor, drive and actuator itself all influence these specifications. Sometimes, repeatability is more important than overall accuracy. The relative importance of the two depends on a thorough understanding of your application.

http://engineering.whitepapers.s3.amazonaws.com/Tolomatic/9900-9231_00_AccuracyRepeatability.pdf
To learn how accuracy and repeatability affect a rodless actuator platform, download the Tolomatic white paper.

Friday, May 29, 2015

New Hazardous Location Magnetic Proximity Sensor - 7HL




New from Canfield Connector - Hazardous Location Magnetic Proximity Sensor
This 7HL rugged magnetic proximity sensor is designed to sense actuator position in stringent, hazardous location applications. The switch features a robust, epoxy-filled, aircraft aluminum body, and has a vibration and shock resistant, electronic circuit. The 7HL is an expansion of the popular Series 7000 "floating" clamp design and will clamp on 2 to 8 inch bore NFPA tie rod linear actuators.

Canfield Magnetic Sensors are available in either reed or electronic sensing styles, the sensors are fully encapsulated for IP 67 service.


Additional Information:

Catalog Link: 7HL Catalog Page

Installation Guide: 7HL Installation Guide

Wednesday, May 20, 2015

SMC's New Modular Style FRL Combination - AC-B Series

SMC's new Modular AC-B Series is an addition to the popular AC-A series of air preparation, filter regulator lubricator (FRL) units.  The AC-B series varies from the AC-A series in a couple of ways.  It has an increased set pressure range of 125 psi.  Additionally, the handle dimensions on the regulators and integral filter/regulators are interchangeable with the old AC series.  Embedded gauge options are also available in the AC-B version but not in the AC-A.

Feature Overview:

  • Mounting interchangeable with existing model
  • Better visibility and safety from the Double Layer Polycarbonate bowl
  • Easy maintenance and installation with the new spacer
  • 7 to 125 PSI set pressure range

 

 

 


 

Better Environmental Resistance


The inner bowl is protected by a transparent polycarbonate bowl guard for complete protection without the need for viewing windows.  Even when the unit is exposed to chemicals or oil, the inner pressure retaining bowl does not come in contact with the external contaminants.

Selection of Pressure Displays


Modular Connection


 
SMC AC-B and AC-A units are available from stock in all configurations.  Contact Scott Equipment  and we will be glad to assist you with any FRL configuration your application requires.