The Xiris Blog

Using Pseudo Color to Highlight Features in Welding

Posted by Cameron Serles on Tuesday, November 12, 2019 @ 11:45 AM

Weld cameras can produce color and monochrome images. Often monochrome images are selected as they provide the best resolution for a wide variety of applications. The monochrome images generated by the camera are often further processed to make the informational detail of the weld process more useful and interesting to the observer.

Usually, a tone mapping process is applied to the weld camera images to provide an enhanced image with maximum contrast for the user, such as what is done with images from the Xiris XVC-1000 weld camera. However, sometimes an additional technique called pseudo coloring can be done on the tone mapped image to provide additional visibility of key features to the user.

 

Pseudo coloring is when each grey level (or intensity value) in a monochrome image is assigned a color. The resulting image can make the identification of certain features easier for the observer, as the perceived difference in color space for the operator is bigger than between successive grey levels alone. Details such as the leading edge of a melt pool, the boundary between a torch and weld arc, the interface between the weld arc and the melt pool, or the texture of the melt pool can all be made more visible to the operator using pseudo coloring.


Monochrome Image from a TIG Weld

TIG Weld with Pseudo Coloring
Monochrome Image from a TIG Weld Same Image, with Pseudo Coloring

 

Why bother with pseudo coloring? You might think that your images look just fine in black and white, right? And they probably do. However, in some welding applications, adding color to an image can make it much easier to distinguish between different objects especially when they are almost the same level of intensity such as in the images above. Try it in WeldStudio™, Xiris’ software utility for weld cameras, to see if it helps.

 

 

Better Images. Better Decisions. Better Process Control.

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Topics: quality control, weld camera, High Dynamic Range, HDR, pseudo color

What Does Welding Sound Like? GTAW

Posted by Cameron Serles on Tuesday, October 29, 2019 @ 11:30 AM

To accompany the launch of Xiris’ new audio monitoring technology, we are continuing our series about sound in welding. So far, we have covered the announcement of our audio monitoring equipment, benefits of adding audio to your weld camera, and sound in GMAW

Today we are investigating sound in GTAW, or TIG welding.
GTAWGTAW is typically characterized by a high-pitched hum or buzz.1

The polarity of the electrical current—whether it’s AC or DC—affects sound in TIG. AC TIG is much louder than DC. As amperage increases, welding noise will also increase.2

At lower frequencies, you will hear a slow pulse sound as you weld. One operator described it as “Braaap, Braaap, Braaap.” As the power frequency increases, such as to 80-90 hz, the sound becomes “sharper:” “BRAP, BRAP.” With the frequency between 100-120 hz, the “brap” sound becomes a whine. At this point, the arc is moving much more quickly, going from positive to negative hundreds of times a second.2

As in GMAW, sound in GTAW can alert operators to mistakes or faults in their welding.

For example, a torch-to-workpiece angle greater than 20-25 degrees may cause a popping sound as well as poor weld quality.3 A high pitched buzzing sound can signify lower penetration of the heat into the parent material.4

An important consideration in monitoring sound in welding is the environment that you’re working in. Each shop or factory has its own unique acoustics. Some frequencies may echo and welding machines can seem very loud or sound different depending on where they’re located.

For this reason, it is important to spend time assessing your welds, monitoring your equipment and learning what a good weld sounds like in your facility.

Watch a video of welding aluminum with GTAW, and how the frequency settings change the sound: https://www.youtube.com/watch?v=XzsfBV6_vNY

 

Better Images. Better Decisions. Better Process Control.

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Sources: 

1https://weldtalk.hobartwelders.com/forum/weld-talk-topic-archive/welding-processes/12469-a-few-questions-on-tig

2https://weldingweb.com/showthread.php?23153-AC-TIG-Aluminum-Noise

3https://forum.millerwelds.com/forum/welding-discussions/3973-sound-of-tig-welding

4https://www.youtube.com/watch?v=XzsfBV6_vNY

 

Topics: quality control, weld camera, welding, GTAW, weld monitoring, audio

Using Weld Cameras to Reduce Health Risks

Posted by Robin Montgomery on Thursday, October 03, 2019 @ 11:30 AM

High Dynamic Range (HDR) weld cameras provide clear images of a welding process including detail of the weld arc as well as the darker surrounding background environment, making it easy to monitor and control precise welding processes. Not only do weld cameras enable operators to see more detail of the welding process, by allowing them to see it remotely, they can improve the health and safety of operators on the job and reduce workplace costs associated with safety.

 

Common on-the-job risks that can be eliminated by removing the operator from the immediate welding environment include:

·         electrical shock 

·         "welding eye" (direct exposure of the weld arc to the human eye)

·         contact with weld spatter

·         injuries from moving or falling objects 

·         welding fume inhalation

 

Many of these risks can cause serious damage to a weld operator. It is proven that workers exposed to welding fumes are more likely to develop lung cancer than those who are not1. Adding a weld camera eliminates the need to be close to the welding process, significantly reducing operators’ risk. Using a high dynamic range weld camera can also reduce fatigue and stress, making the job safer, more enjoyable, and more appealing to existing and prospective operators.
Introducing a weld camera will also reduce costs that are associated with health and safety, such as:

·        workers' compensation insurance rates

·        employee health insurance rates

·        costs due to lost productivity

·      possible litigation

There are many other benefits to using a weld camera, but health and safety is such an important factor that cannot be overlooked. When operators are able to view the welding process in a safe, remote location, there are a multitude of positive results.

For more information visit our website or contact us!

 

Better Images. Better Decisions. Better Process Control.

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Sources:

1https://www.channelnewsasia.com/news/world/more-evidence-welding-fumes-raise-lung-cancer-risk-11553186

Topics: quality control, weld environment, High Dynamic Range, safety, health, HDR, weld camera system, consistent

What Does Welding Sound Like? GMAW

Posted by Cameron Serles on Wednesday, October 02, 2019 @ 01:00 PM

Each type of welding has a unique sound. Sometimes that sound can signify problems. Other times it tells the operator that everything is going exactly right. Xiris has now added audio monitoring to our industry-leading weld cameras. This innovative system gives welders a new tool to monitor and improve their operations.

However, it often takes years of experience to be able to distinguish the slight differences in sound that separate a good weld from a bad one. And if you’re new to welding or you’ve not been monitoring by sound before, how do you know what to listen for?
GMAW

Today, we’re looking at GMAW, or MIG welding, and sharing the various sounds you may hear and what they mean.

  1. Frying Bacon: This is the most common description for what GMAW sounds like. The torch will sizzle, with the occasional pop. This usually means that your welder is set up properly and you are laying a quality bead.
  2. Popcorn Popping: If your welding sounds more like popcorn than bacon, with lots of snapping and popping, this may signify that your wire speed is too fast. “The wire is hitting the surface and not melting into the metal fully, creating a weak and dangerous weld.”1
  3. Hissing, as though gas is leaking: Often means too slow of a wire speed. This is also a weak, unsafe weld.1
  4. -  Popping and Hissing: This usually signifies a problem with the shielding gas. You will also see excessive sparks and slag, and pores in the finished weld. Check that the gas is on, there is gas in the tank and the tank pressure is correct.1
  5. Irregular: Another issue that can be identified by sound is wire stickout. If your stickout is too long, the arc may sound irregular – constantly changing in pitch and/or volume.2

The voltage and current setting on your welder, as well as the metal that you are welding, all affect the sound of the arc in GMAW.3 For example, stainless steel welding uses three different approaches: dip transfer, globular transfer or spray arc. Each of these techniques has a different sound, as the arc moves from low power to high through the metal transfer cycle.4

In dip transfer (low amperage welding, which is ideal for thinner materials), you hear a fast crackling—the coveted bacon sound. Globular transfer, which is not often used, makes an uneven, splattering sound, with occasional hisses. Spray transfer has a consistent hissing sound as the hot metal transfers to the parent material in a steady stream.

It is important to learn your equipment, understand your materials and experiment with different settings. Monitor the sound and appearance of the arc and critically evaluate the quality of your welds. Soon you will know what to listen for.

Watch a video that shows how varying the wire feed speed and voltage changes the sound of MIG welding: https://www.youtube.com/watch?v=kmcO0lFfn1k.

 

Better Images. Better Decisions. Better Process Control.

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Sources: 

1https://garage.eastwood.com/eastwood-chatter/listen-to-your-mig/

2https://www.millerwelds.com/resources/article-library/mig-welding-the-basics-for-mild-steel

3https://forum.millerwelds.com/forum/welding-discussions/4179-mig-welding-sound

4https://www.theshedmag.co.nz/home/2018/7/8/tackling-stainless-a-guide-to-stainless-steel-welding

 

Topics: quality control, weld camera, GMAW, weld monitoring, audio

Xiris Celebrates 30 Years!

Posted by David Giannotti on Tuesday, September 24, 2019 @ 10:00 AM

Xiris is pleased to celebrate its 30th anniversary in September, 2019. Founded 30 years ago by Cameron Serles, the business was set up to commercialize the budding technology of machine vision, using cameras to acquire images and send to computers to process those images. Back in 1989 when the company started, most manufacturers were highly skeptical of the possibility of cameras being able to inspect manufactured goods by measuring the size or shape of manufactured goods. As a result, the first few years were tough until the technology slowly gained acceptance, initially in the automotive and semiconductor industries, then eventually being embraced into all kinds of applications across all forms of manufacturing and materials processing.

Xiris LogoOver the years, Xiris developed inspection systems for the automotive, semiconductor, electronics, pharmaceutical, steel, plastics, compact disc and printing industries.For the past 10 years or so Xiris' focus has been on the metal fabrication industry.

We would like to thank everyone who has contributed to our success over these past three decades. We would not have been able to do it without all of our customers, partners, and employees. Our team at Xiris Automation Inc. is grateful for our journey thus far and we are looking forward to another 30 years of advancing inspection technology.

Topics: quality control, welding

How to Make Welding More Environmentally Friendly

Posted by Robin Montgomery on Wednesday, September 18, 2019 @ 02:05 PM

In today’s world, environmental issues are becoming more and more important in all aspect of business. Currently, “humanity uses the equivalent of 1.7 Earths to provide the resources we use and absorb our waste”1. So, we want to share how you can do your part by making your welding processes more environmentally friendly through scrap and waste reduction.

 

Implementing camera systems for inspection and monitoring can help you reduce waste in your welding processes. Camera systems give you instantaneous feedback, allowing operators to immediately adjust their process before defects or scrap is created. Our customers are often our best cheerleaders: Brian Dobben, from Flowserve, credits Xiris’ dual-camera weld monitoring system with roughly an 80-95% reduction in weld defects long-term. The monitoring feedback helps reduce the scrap from welding processes that are not in control, helping operators to weld with better precision, making better, stronger welds. The end result? Final products that last longer, with less frequent replacements in the field, contributing to less waste. 


Enviro Blog XVC

Enviro Blog - Tennaco WI
Weld Camera System Weld Inspection System

 

Other examples exist, such as use of cameras in the classroom. By using weld cameras at schools, weld instructors can drastically reduce the weld coupons, energy and consumable materials they use by recording some of their welding lessons using a weld camera. By recording some welding lessons, the instructor doesn’t have to waste energy and materials by continuously repeating their demonstrations.

 

Cameras for monitoring and inspection can be used in a variety of different welding applications to help operators improve their quality and therefore reduce their scrap. Every step counts towards helping the environment, so take that first step by implementing a camera system with that automated welding process.

 

 

Better Images. Better Decisions. Better Process Control.

Follow Xiris on social media for regular updates and welding videos!

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Source: 

1https://www.footprintnetwork.org/our-work/ecological-footprint/

Topics: quality control, weld camera, weld inspection, High Dynamic Range, HDR, sustainable, environmentally friendly

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