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Motion Industries, a distributor of industrial maintenance, repair, and operation replacement parts, is pleased to announce that Ellen Holladay, the company’s SVP, Chief Information Officer and Operational Excellence Officer, is the 2018 recipient of the Bearings Specialists Association (BSA) Lifetime Achievement Award. The presentation was made at the association’s 2018 Annual Convention April 28 – May 1 at the Hyatt Regency Coconut Point Resort & Spa in Bonita Springs, Florida.

Ms. Holladay joined Motion Industries in 1990 as Manager of Systems Planning and has since led the development of Motion’s highly refined supply chain capabilities, including a comprehensive integration platform designed to address the complex requirements associated with business-to-business transactions among North America’s leading manufacturers and suppliers. In addition to CIO responsibilities, Ms. Holladay leads the eBusiness and Operational Excellence groups within Motion.

Ms. Holladay has been a BSA member since 2000 and immediately stepped into a leadership position the following year as Information Technology & Logistics, Chair. She has continually held a BSA leadership position since, including First Vice President in 2010 and President in 2011. Ms. Holladay has continued to support the organization as an active committee Chair and has contributed to the annual convention programs by participating in panel discussions and presenting reports.

According to the BSA, a recipient of its Lifetime Achievement Award must have been a member or participating manufacturer of BSA for at least 25 years, attended BSA events, been actively involved in the affairs of the association and demonstrated a leadership role within the industry.

Motion Industries
www.motionindustries.com

Morgan Advanced Materials’ Seals and Bearings business offers axial and radial bearings for applications in the petrochemical industry with severe service conditions. Morgan’s bearings are mechanically strong, even at high temperatures, and are suitable for applications where conventional lubricants are not effective. The bearings have a low wear rate due to their rugged construction from carbon, graphite, or silicon carbon based materials. They perform reliably under stress and can be tailored to best fit individual applications.

The bearings also feature high chemical inertness and dimensional stability, making them good for the petrochemical industry. They are easy to install and easily machined within tight tolerances, resulting in reliable performance.

Morgan Advanced Materials

www.morgansealsandbearings.com

By Christine Berlly

Bearings can come under attack from exposure to water and moisture, marine climates, and from a variety of chemicals (both gas and liquid). In today’s blog, we’ll look choosing seals and coatings in corrosive environments.

Seals
Certain types of bearings are available with integral seals. The seals protect the critical interior surfaces of the bearing from contaminant ingression. They also prevent lubricant leakage. When using bearings that do not have integral seals, consider external seal options.

Seals are typically a nitrile or Buna-N rubber compound. Teflon seals, which are highly resistant to most chemicals, are available on many types of bearings. Viton seals offer chemical resistance and are more robust than Teflon options.

Seal construction and shape can improve the effectiveness of the design. Labyrinth-type seals, where the seal lip sits in a groove machined in the inner ring, improve sealing capability without increasing torque. In addition, double-lip seals offer added protection compared to single-lip designs.

Coatings
Anticorrosion coatings can be applied to bearings manufactured from either chrome or stainless steel to make the surfaces less chemically reactive than the base metal.

Surface engineering is highly specialized, so experts recommend consulting with a bearing manufacturer in selecting a coating or treatment. Anticorrosion coatings include TDC (thin dense chrome), cadmium plating, nickel plating, galvanized zinc, titanium nitride and carbide, and passivation (of stainless steel).

AST
www.astbearings.com

NTN, the parent company of BCA Bearings, has announced the release of 23 new product SKUs. The additional products cover BCA’s wheel hubs, bearings and seals product lines.

“We are pleased with the progress we are making in the expansion of our product offering,” said Melissa Campobasso, Product Manager, Automotive & Heavy-Duty Truck. “This release of new products is specifically beneficial to our medium-duty customers as most of these parts fall within that product line. With that said, we assure all of our customers that we will continue to focus on our complete breadth of products in an effort to better provide the parts that the market requires.”

BCA Bearings, powered by NTN, is a long-time, trusted OE supplier to the automotive aftermarket. Proud to be providing solutions that include the most durable bearing products you need in the industry, BCA offers a full line of wheel hub assemblies, seals and loose bearings.

BCA
www.BCABearings.com 

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London Irish became the latest victims of the financial crisis gripping the Premiership after they were suspended by the Rugby Football Union on Tuesday.

The Exiles join Worcester and Wasps on the sidelines as the bleak outlook of the sport in England continues, with the top league now having 10 teams.

But the trio aren’t alone with struggles as here the PA news agency looks at their fate and those clubs that have also been affected by the grim outlook.

Gone

Worcester Warriors

The first club placed into administration back in September, Worcester‘s future is still uncertain despite being taken over by Jim O’Toole’s Atlas Group. Entrance into the second tier Championship has been blocked by the Rugby Football Union for their failure to meet certain conditions and their plan of joining with Stourbridge and relaunching in the fifth tier appears dead in the water.

Wasps

The month after Worcester folded, Wasps followed them into administration as the league suffered the crushing blow of losing one of English rugby’s most famous brands. Further misery was to come as having targeted rebirth in the Championship, the failure to meet certain conditions forced the RFU to revoke their license and demote them to the foot of the rugby pyramid.

London Irish

Burdened by debts of around £30million and with owner Mick Crossan desperate to sell, London Irish have followed Wasps and Worcester out of the Premiership. The RFU granted an extended deadline of June 6 for either the proposed takeover by an American consortium to be completed or for Crossan to prove he can finance Irish for the entire 2023/24 season. Neither came through, resulting in the club being suspended from the entire league structure.

London Irish GONE

Wasps GONE

Worcester GONE

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Another dreadful day for club rugby union

— Alex Spink (@alexspinkmirror) June 6, 2023

Shaky foundations

Leicester Tigers

Leicester needed an emergency cash injection of £13million from directors Peter Tom and Tom Scott in February to address what chief executive Andrea Pinchen described as “very challenging conditions”. A letter from the club to shareholders sent in March stated that if the funding was not approved, there would be no option but to appoint administrators.

Exeter Chiefs

Even Exeter, one of the few clubs in the pre-pandemic era to operate at a profit, were forced to take special measures in December. Chiefs owner Tony Rowe bought a stake in a hotel owned by the club in order for it to service its debts, including Covid loans issued by the Government. Rowe’s intervention has shored up the finances for the time being.

Blues skipper Dalton Papali’i waxed lyrical about his star winger Mark Telea ahead of the Aucklanders’ final game of the season against the Highlanders at home.

The 2023 regular season may not have been as glittering as last year but the Blues sit in a comfortable third place on the table heading into the final round.

Red-hot Telea

One highlight of the year so far has been the continued rise of Telea, who has shown his venom with ball in hand throughout and is establishing himself as one of the most effective runners in Super Rugby Pacific.

He makes people look SILLY 😵

Mark Telea is the full package right now 📦

Catch The Breakdown at 7.30pm Sundays on #SKYSportNZ and Youtube 🏉 pic.twitter.com/tUFwb1Qovf

— Sky Sport NZ (@skysportnz) June 2, 2023

Papali’i labelled Telea as a problem but not within the squad, rather one for any defenders trying to stop him.

“He’s unbelievable, man, seriously crazy,” said Papali’i. “He’s got really good balance, and for his size he’s bloody powerful. I’ve played him at NPC and gone to tackle him, and he’s just given me a bullet fend. Its like, ‘hey, I’ve got to think how to tackle this guy’.

“He’s been a problem, and he’s always going to be a problem.”

Will only improve

The captain joked about having Telea slow down once he almost inevitably breaks the line to let him catch up. Papali’i only expects him to get better.

”If he makes a break I tell him to pipe it down a little bit, let me catch up,” said Papali’i. “He is in exceptional form and if he carries on I’d say he’s either the best or one of the best wingers in the world. He’s just got to keep doing what he’s doing.

“He’s a hard worker, and has the gifts to take it all the way. I’ve seen him grow on and off the field. He’s already one of the best or if not the best winger in the game, and he’s still getting better.”

Papali’i is searching for a complete performance from the Blues to gather some momentum going into the play-offs.

“We’ve got to put an 80-minute-plus game together. We tend to fall off during games,” said Papali’i. “We know that’s the problem and we’ve talked as leaders that we need to bring the boys in … we call it a grip moment, where we need to take it by the hands and execute.”

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Table of Contents

In the modern manufacturing industry, CNC machining centers, as a kind of high-efficiency and precise machining equipment, are widely used in the machining of metals, plastics, and many other materials. However, in the actual operation process, many operators may encounter the problem of abnormal spindle speed. This will not only affect the machining quality but also may lead to equipment damage and increase production costs.

Therefore, understanding the causes and solutions of abnormal spindle speed is essential to ensure the normal operation of the equipment. In this paper, we will discuss the problems related to the abnormal spindle speed of CNC machining centers in depth, and discuss in detail the preparatory work, fault investigation, cause analysis, solutions, preventive measures, and other aspects.

 

CNC machining center spindle maintenance before the preparatory work

 

1. Tools and equipment preparation

 

Before performing any maintenance or inspection, make sure you have the necessary tools and equipment. This includes:

(1) Multimeter: for measuring voltage, current, and resistance to help diagnose electrical problems.

(2) Lubricant: for checking the condition of the lubrication system and replenishing the lubricant.

(3) Wrenches and screwdrivers: for removing and installing parts.

(4) Paint brushes and cleaners: for cleaning equipment and removing oil and debris.

2. Recording phenomena

 

Before starting the inspection, record the specific manifestations of abnormal spindle speed. This includes:

(1) Frequency and range of speed instability.

(2) Changes in spindle speed under different operating conditions (e.g., idling, cutting).

(3) Any accompanying unusual sounds or vibrations.

3. Familiarize yourself with the equipment manual

 

Familiarize yourself with the operation manual of the CNC machining center, especially the maintenance requirements and troubleshooting guidelines for the spindle section. This will help you to diagnose and repair problems more effectively.

4. Personnel Training

 

Ensure that the operator is properly trained in the basic operation, maintenance requirements, and common troubleshooting methods of the equipment. Good operating habits and proper maintenance knowledge can significantly reduce the frequency of failures.

Pre-maintenance survey of CNC machining centers

 

It is vital to conduct a thorough investigation before getting your hands dirty with repairs. Here are a few survey points:

1. idle state observation

 

Observe the performance of the machining center in the idle state. Note if there is any instability in the spindle speed, especially at different idle speeds. This will help you make an initial judgment as to whether there is a problem with the equipment itself.

2. Performance under cutting conditions

 

When performing actual machining, especially under high loads and large depths of cut, carefully observe the change in spindle speed. If there is a noticeable loss of speed under these conditions, it may be related to the cutting force or load.

3. External environmental factors

 

Check the surroundings for factors that may affect the operation of the equipment. For example, unstable supply voltage, excessive temperature, or humidity may cause abnormalities in the equipment. Recording these environmental conditions can help you determine the source of the problem.

4. Equipment History

 

Review the equipment’s maintenance records and history of failures to see if the equipment has had similar problems. This can provide important clues to the diagnosis of the current problem.

Analyzing the Cause

 

After the investigation is complete, the cause of the abnormal RPM needs to be analyzed in depth. The following are some common causes:

1. Signal interference

 

The signal received by the spindle servo amplifier (inverter) of the CNC machining center may be interfered with during transmission. This interference can come from the external electromagnetic environment, wiring problems inside the machine, or poor connections. This can cause the spindle to receive incorrect speed commands.

2. Unstable voltage

 

Unstable power supply voltage can affect the normal operation of the equipment, especially if the load varies greatly. Voltage fluctuations may cause the servo system to fail to control the spindle speed correctly. Ensuring a stable power supply is an important measure to prevent abnormal speed.

3. Timing belt wear

 

A long or worn synchronous belt that transmits the spindle can lead to slippage. This is especially obvious at high speeds, and slippage will directly affect the spindle speed. Regular inspection and replacement of the synchronous belt is the key to ensuring the stable operation of the spindle.

4. Encoder Failure

 

Damage to the spindle encoder or poor feedback signal may cause the control system to be unable to accurately determine the actual spindle speed. Regularly check the status of the encoder to ensure its normal operation.

5. Bearing problems

 

Damaged or poorly lubricated bearings supporting the spindle will increase the spindle’s resistance to rotation, resulting in abnormal speed. Maintenance and replacement of the bearings are important to ensure the smooth operation of the spindle.

6. Lubrication system failure

 

Poor lubrication of the spindle may also lead to unstable speed. Insufficient or contaminated lubricant will affect the normal operation of the spindle, resulting in increased friction and thus affecting the speed.

7. Software setting problems

 

Improper parameter setting in the CNC system may also lead to abnormal rotation speed. Check the relevant parameter settings in the CNC system to ensure that they meet the processing requirements.

Determine the CNC machining center spindle troubleshooting steps

 

After analyzing the cause, you can start to gradually troubleshoot and solve the problem. The following are specific steps for troubleshooting:

1. Measure the voltage

 

Use a multimeter to measure the voltage of the CNC machining center. First, make sure that the power supply is turned on properly and check whether the input voltage is within the range specified by the equipment. If the voltage is found to be normal and other machines next to the machine using electricity from the same grid are working properly, the cause of unstable voltage can be ruled out.

2. Check the lubrication system

 

Check the amount of lubricating oil in the CNC machining center to ensure that it is within the normal working range. Confirm that the lubrication system is working properly and that there are no oil leaks or open-circuit faults in the oil circuit to rule out lubrication faults. If an oil line blockage or oil pump failure is found, it should be dealt with in time.

3. Bearing sound check

 

When the spindle is running, use a long rod (such as a screwdriver) to lean near the spindle box, with one end leaning on the ear, and listen to the sound of the bearing when it is running. If no abnormal sound is heard, the possibility of bearing failure can be ruled out. If there is noise, the bearing may be damaged or lacking lubrication.

4. Check the synchronous belt

 

Open the spindle box and check the synchronous belt connection between the spindle motor and the spindle. Press the belt between the two pulleys by hand to confirm its tightness. If the timing belt is found to be worn, it needs to be replaced promptly.

5. Encoder Inspection

 

Check the synchronous belt between the spindle and the encoder to make sure it is not worn or slipping. If problems are found, replace the timing belt promptly. At the same time, check the connection line of the encoder to make sure the signal transmission is normal.

6. Signal line check

 

Check the signal line from the encoder to the servo amplifier to make sure there is no external interference. If there is a problem with the signal line, it may need to be rewired or shielded.

Table 1 Troubleshooting Steps for CNC Machining Center Spindle Failures

 

Solution

 

After completing the troubleshooting, take appropriate solutions according to the problems found:

1. Replace the timing belt

 

If the timing belt is found to be worn, it needs to be replaced with a new one. Select a high-quality timing belt that matches the equipment to ensure its stability during operation.

2. Repair or replace the bearings

 

If the bearings are faulty, repair or replace them in time to ensure smooth rotation of the spindle. Use reliable bearings to avoid the recurrence of failure.

3. Optimize the lubrication system

 

If there is a problem with the lubrication system, clean the system and replace the lubricant to ensure good lubrication to reduce friction. It is recommended to use a high-quality lubricant suitable for the requirements of the equipment.

4. Adjust the power system

 

If the power supply voltage is unstable, consider installing a voltage regulator or UPS system to ensure the normal operation of the equipment. Make sure the power supply line is good to avoid failure caused by power supply problems.

5. Software parameter adjustment

 

Check the parameter settings in the CNC system to ensure that they meet the processing requirements. If necessary, carry out software upgrades or resets to solve software problems.

Table 2 CNC machining center spindle speed abnormal solution

 

Preventive measures

 

To avoid the recurrence of the problem of abnormal spindle speed in the CNC machining center, the following preventive measures are recommended:

1. Regular Maintenance

 

Develop and follow a regular maintenance schedule to regularly check the condition of key components such as lubricants, synchronous belts, and bearings. It is recommended to conduct a comprehensive inspection once a month to ensure that the equipment is in good condition.

2. Power supply management

 

Ensure that the power supply is stable and use a voltage regulator if necessary to ensure the normal operation of the equipment. Check the power lines to make sure there is no looseness or aging.

3. Operation training

 

Provide relevant training to the operators to improve their ability to recognize and handle equipment faults, find problems, and handle them in time. Organize regular technical training to ensure that the operators have the latest maintenance knowledge.

4. Use of monitoring system

 

Consider installing a monitoring system to monitor the operating status of the spindle in real-time, so that potential problems can be identified and solved promptly. Through data recording and analysis, early warning can be given to prevent problems from expanding.

5. Strengthen site management

 

Ensure that the site environment is neat, and regularly clean up debris around the equipment to avoid interference with the equipment. Develop a site management system to ensure that the equipment operates in a good environment.

Table 3 CNC machining center spindle speed abnormal preventive measures

 

Summarize

 

Abnormal spindle speed of CNC machining centers is a common problem, but through systematic troubleshooting and analysis, a suitable solution can be found. Maintenance and management are the keys to preventing the problem from occurring, through regular inspection and timely processing, it can effectively extend the service life of the equipment and improve processing efficiency.

I hope that the sharing of this article can help the majority of operators in the use of CNC machining centers to ensure smooth production. In the future, with the continuous progress and development of technology, we have reason to believe that the CNC machining centers will be more intelligent, and the failure rate will be reduced, thus bringing greater development opportunities for the manufacturing industry.

New Zealand’s two-time Rugby World Cup-winning captain Richie McCaw has backed arch-rivals Australia to spring a surprise in France.

After reaching the World Cup final in 2015, the Wallabies have struggled to remain at the top table of the global game.

They exited the 2019 showpiece at the quarter-final stage before Dave Rennie took over from Michael Cheika.

Rennie would only last until the start of 2023 when he was sacked, ending his tenure with a 38 per cent win record.

Former head coach Eddie Jones, who led Australia to a runners up spot in 2003, has since returned and McCaw knows the immediate impact he could have.

In the mix

“Eddie Jones, whatever team he takes over, he usually causes some change pretty quick and they get a real bounce and he will probably do the same with the Aussies,” he told World Rugby.

“You might think they might not be where you would usually consider them to be, but they have a unique way of using what they have got to be right in the mix.”

McCaw doesn’t have a clear favourite for the Webb Ellis Cup and believes that the upcoming tournament is “pretty wide open”.

“You are not too sure what might happen. So there is that side of it and, I guess from a New Zealand point of view, in the past you have sort of always knew that if they can put it together they can go and get the job done, whereas after the last year you sort of go, ‘jeepers, there is going to have to be some improvements to put the team in the right spot’,” he said.

Ireland and France

“I guess from a northern hemisphere point of view, Ireland have set the pace in the Six Nations and the French aren’t that far behind, so it makes it pretty intriguing.

“There is no doubt that people consider the French and the Irish have got a pretty good chance of winning.”

The top two ranked teams are currently Ireland and France, with the latter also benefiting from having home advantage.

McCaw sees both teams as title challengers but has been particularly impressed by how Andy Farrell’s men have progressed.

“As we have found out in years gone by, where you are ranked going into a World Cup, actually doesn’t necessarily count for a whole lot,” he added.

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“But just to put aside the rankings, I got to see the Irish in New Zealand last year for three Tests and there is a quite a strong resolve about them, of knowing they are on a mission.

“The way they put together that series win was pretty impressive and they have backed it up again just recently so it is going to make it interesting.”

Wallabies head coach Eddie Jones has claimed that he will be leaving the side after the 2023 Rugby World Cup in France. 

The news comes as a surprise with Jones’ deal signed until the 2027 World Cup which will be hosted in Australia. The prescribed tenure over his contract period would also include the 2025 British & Irish Lions tour down under.

However, Jones seems insistent that he will be leaving his role after the World Cup regardless of their performance.

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“It will be time to go”

“I’m only coaching to this World Cup. I’ve signed, but as I’ve made the mistake before, I’ve stayed too long. So we win the World Cup it will be time to go. If we lose the World Cup it will be time to go,” Jones told The Evening Standard podcast.

Rugby Australia (RA) responded swiftly by claiming that Jones is still locked in and they have no concerns that he will leave the job.

“Eddie’s contract runs until 2027,” the RA spokesperson told the Sydney Morning Herald.

Meanwhile, Jones is hoping for changes in Giteau’s Law that restricts the coach to selecting only three overseas-based players with a minimum of 30 Test caps. It is designed to incentivise players to remain in Australia and offer reward to locally-based talent.

Jones suggested that even though he has not approached the RA regarding a policy change he believes there will be a good response.

“Can’t snub that sort of talent”

The veteran coach outlined four stars who could not be looked past including gargantuan lock Will Skelton who has recently added another Champions Cup medal to his collection.

“They [Rugby Australia] had a law called the Giteau Law which was you could only get three players outside Australia with 30 caps,” Jones said.

“But we haven’t tabled that [a policy change] with the board yet, but I’m sure we’re going to get a positive response about more players. Because we’ve got [Will] Skelton, who’s probably the best right-hand-side lock in the world. Richie Arnold at Toulouse, who’s a fantastic player in the Top 14. Quade Cooper, [Samu] Kerevi, [Marika] Koroibete, we can’t snub that sort of talent.”

Big packs are important at Test level

Jones, who coached the Barbarians against a World XV last weekend, outlined the importance of a big pack of forwards in the modern game especially considering the physicality of teams like France and the Springboks.

“You look at the game statistically, 70% of the game is played within one pass, so they’re big man carries,” he said.

“Just yesterday with the Barbarians we had a tighthead prop from the Sharks, [Carlu] Sadie, comes on the second half; he’s got no leg speed but when he carries he takes men with him so it gives you a good base to work off.

“So a big right-hand side lock, big number eight, big number three [is what we need] mate.”

Plenty of time to make a difference

Jones’ second stint with the Wallabies well and truly kicks off against the Springboks at Loftus Versfeld in the Rugby Championship on July 8. Even with the limited time to prepare for a World Cup charge, the veteran is upbeat about his chances to improve the side.

“We’ve got five Tests matches, which is plenty. [World Cup-winning coach] Bob Dwyer used to say if you can’t change a team in a week, you can’t coach. So we’ll give it a go,” he added.

Ligue 1 side PSG are interested in signing Bayern Munich winger Douglas Costa, according to Gianluca di Marzio.

Juventus are also pushing for the Brazilian in a major way and hope to convince him to join Serie A this summer.

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