Wednesday, February 10, 2016

REVO – Versatility Redefined

When buying a car, most people have a list of what they want as they start shopping. For some people it’s the performance of a sports car; others want serious off-road capability, or the highest fuel economy, and some are focused on safety.

But when the deal is done, and the keys are handed over, most of us wind up with a vehicle that possesses some of the attributes we wanted, but also makes the best sense for our daily lives, not to mention our budget. Because our lives are not one dimensional, our decision process can’t be either.

These same types of factors appear in our work lives as well. There are many companies and facilities that specialize and make a single part type. For these situations, a single purpose specialized inspection solution is a great choice. You can read about an example of this in our other post here. In the majority of facilities though, we are faced with a range of parts and needs that change daily, if not hourly, and require a more versatile CMM solution.

In the past, finding this versatility was often a series of compromises; between accuracy, working envelope, sensor type, ease of use, and budget. Maximizing any one of these factors would often mean sacrificing another and would ultimately reduce the overall performance of the solution.

With REVO however, we can have the maximum versatility, without sacrificing any of the other attributes you want in a CMM.

Accuracy: REVO uses synchronous 5 Axis motion to reduce the dynamic errors inherent in moving CMM structures. This allows you minimize measurement uncertainty in your process.

Work Envelope: The flexibility of 5 Axis motion allows the programmer to navigate around and into parts that otherwise would not fit on a particular size machine. This increases the effective work envelope of your CMM, saving you money and floor space.

Sensor Type: REVO can accommodate a variety of tactile scanning solutions, as well as a surface finish sensor, and optical scanning. This provides you a very versatile and cost effective technology platform, reducing the number of different processes and unique machines required to measure your parts.

Ease of use: REVO offers infinite positioning capabilities, but uses a simple calibration routine that eliminates the need calibrate each unique position. This makes it easy to change quickly from job to job, without spending hours building and calibrating specific tools for the next batch of parts to be checked.

Budget: When compared to other high accuracy scanning CMM solutions; REVO’s initial costs, throughput savings, cost of styli, and reduced downtime for probe calibrations, typically provide an ROI of 10-14 months, many times even reducing the total number of CMMs required to meet production needs.

Supporting today’s manufacturing is a challenge for inspection, requiring versatile solutions that provide good value and are simple to use. REVO is the single tool that can meet these demands and provide a platform of technology and efficiency to build your inspection capabilities around. To see the REVO in action, check out our videos below.

Tuesday, February 9, 2016

CORE – THE Optical CMM

The Wenzel CORE is the best machine to measure turbine blades, medical implants and any other difficult to measure part with the same awkward characteristics of the blades and knee joints (polished surfaces, sharp edges, tiny features).

Like with any Wenzel Metrology System the key to success is in the structure, the sensor, the speed, the implementation, the support and the accuracy.

Why is the CORE the best?


Here are some numbers for the CORE;

Scanning / movement speed  
Blade length  
Cycle time  
Calibration time  
ISO calibration test  
Shop floor operation  
Robotic Interface Protocol  
Axes of operation  
Access problems for blades  
Point cloud handling experience needed  
Point cloud stitching experience needed  
Point cloud sectioning experience needed  
Budget for spray paint  
Budget for CMM room/enclosure  
Cost of compressed air  
Tip radius compensation error  
Maximum out of plane error  
Max degrees from surface normal  
Number of cameras in the sensor  
Number of days training  
Speed of light  

Number of minutes you’ll regret buying one?  
4 to 8 microns
400 to 800mm/s
1" to 100"
¼ of that of a traditional CMM
¼ of that of a traditional CMM
less than 1 minute
18 to 30 ºC (64 to 86 ºF)
5 or 6
0 microns
0 microns
671,000,000 miles/hour

Zero (0)

CORE is a shop-floor, optical CMM which we say “measures at the speed of light”. If fact, the CO at the start of the product name is a corruption of Cₒ, the symbol for the speed of light in a vacuum.

If you would like more information about the CORE, watch our video presentation below and then contact us for your free time study and gage R&R test.

SP25 – Economical scanning

Need accuracy? You might need scanning.

One of the main reasons you may choose to use tactile scanning technology is the improved accuracy that scanning affords. For example, in some cases, the choice of a scanning alone will improve the accuracy of the system nearly 30% with the remaining variables being equal.

Additionally, by increasing the number of points you take on your considered features, you improve the accuracy and confidence in the data captured. One of the caveats of scanning is that it is more expensive, but in the case of the SP25M it is not necessarily true. Lets find out more about the SP25M.

One way to maximize your scanning technology is to have a good platform that you are putting the scanning on. If you think about how a CMM acquires discrete points, the scanning system is much more dynamic. The CMM can move in up to 3 axis while scanning versus moving in one axis for taking a single point.

You need an inherently rigid platform, that resists deformation, and minimizes the impact of these dynamic forces. In our opinion, Wenzel America CMM’s provide a variety of  platforms great for the purpose of scanning.

How it works
"The probe body houses the probe electronics and two of the three components which comprise the ‘isolated optical metrology’ transducer system, these being a pair of infrared beam sources (IREDs) and a pair of light sensitive position sensing devices (PSDs).

The scanning module houses the remaining components of the isolated optical metrology system which are a patented pivot spring motion system with an integral pair of reflective concave mirrors.

The pivoting motion system comprises two diaphragm springs and a ferrofluid damping system. One spring allows movement in all directions whilst the other (pivot) spring is stiff in (probe) X & Y but allows movement in Z. 

The reflective mirrors are integrally mounted to the motion system and therefore move directly with stylus deflection.

In operation, the IRED beams, originated in the probe body, are directed onto the mirrors inside the scanning module. These beams are then focussed and reflected back onto the PSDs in the probe body and can then be translated into spatial measurement coordinates."

What this means for you?

There is some forethought that needs to go into the selection of which module you will use most. After that, however it is a simple matter of picking up the module, qualifying your stylus and start measuring.

The sensor physics dictate how much the maximum deflection can be. For any scanning systems based on these principles (Zeiss XXT, Hexagon LSP-X1, Renishaw SP25), some consideration has to be given to what expected working length (EWL) you need for your application.

If you are reaching into a deep bore, for example, you may choose something like the SM25-4 which gives you an EWL between 220-400mm.

Even if you are moving up from a TP20 situation, you can get the TM25-20, which allows you to use your existing stock of TP20 modules for your existing applications that you are not going to use scanning.

This is the beauty of the SP25 system. You can add it to your existing PH10 system relatively painlessly. You do not have to lose your library of existing TP20 programs and accessories. For your existing applications, just carrying on as usual. For new programs and programs that you want to re-write you can take advantage of your new SP25 scanning system.

Is the SP25 scanning solution for you?

The following check list will help you.

  • Do you have a PH10 probehead? If so, jumping into SP25 scanning could be as easy as buying the scanning module, you may have to add scanning capabilities to your controller.
  • Do you have a need for increased accuracy over your current probing system? In most cases, there is an immediate increase in accuracy by the use of a SP25.
  • Do you need a way to increase throughput and data confidence? Many applications will improve the throughput and confidence by scanning. How? Reducing machine positioning moves when the CMM hunts and pecks with a touch trigger probe. While scanning, the stylus stays in contact with the part as it is simultaneously collecting hundreds, if not thousands of points. This provides the dimensional data for the feature as well as giving you an idea of the form.

If you need even greater throughput check out our other posts this month on the:

REVO scanning system
CORE non contact scanning system