The document discusses soft foot diagnosis and correction using laser alignment tools. It describes different types of soft foot issues like rocking, angled, and induced soft foot. Rocking soft foot has higher values at diagonally opposed corners. The document shows an example of diagnosing and correcting a rocking soft foot issue using laser measurement values and suggested shim corrections. It emphasizes that the type of soft foot must be correctly identified to determine the proper correction method. Laser tools can accurately detect and diagnose soft foot issues to expedite the correction process.
Vibration Analysis, Emerson Makes it Easy for YouDieter Charle
One of the most powerful tools to deploy reliability centered maintenance are portable vibration measurements. With the new portable vibration analyser of Emerson, portable vibration analysis is now made easier than ever before. By the following slidedeck you'll get an introduction to the basics of vibration analysis and the capabilities of the CSI2140
Balancing of rigid rotor and balancing of flexible rotor-A ReviewRahul Kshirsagar
The presentation details about types of rigid rotors and flexible rotors used in mechanical systems and experimental method of balancing these rotors to avoid mechanical vibrations.
Transcat and Fluke Present: Precision Shaft Alignment Made EasyTranscat
Visit www.transcat.com for more details.
Misalignment in rotating machinery wastes money, it’s that simple.
Shaft alignment is no longer reserved for large companies with internal alignment experts, or just the most critical machines; misalignment is no longer accepted as simply the cost of doing business.
Learn how new laser shaft alignment tools can eliminate difficult calculations and guess work, making precision alignment faster and easier than ever!
Topics Include:
- Symptoms and Consequences of Misalignment – the hidden costs of doing nothing
- The Benefits of Precision Shaft Alignment – energy savings, increased revenue, and safety
- Alignment Principles – how shafts have been aligned historically and recent technique improvements
- What's New in Laser Alignment Technology – how non-experts can align coupled machines like a pro in a fraction of the time
Vibration Analysis, Emerson Makes it Easy for YouDieter Charle
One of the most powerful tools to deploy reliability centered maintenance are portable vibration measurements. With the new portable vibration analyser of Emerson, portable vibration analysis is now made easier than ever before. By the following slidedeck you'll get an introduction to the basics of vibration analysis and the capabilities of the CSI2140
Balancing of rigid rotor and balancing of flexible rotor-A ReviewRahul Kshirsagar
The presentation details about types of rigid rotors and flexible rotors used in mechanical systems and experimental method of balancing these rotors to avoid mechanical vibrations.
Transcat and Fluke Present: Precision Shaft Alignment Made EasyTranscat
Visit www.transcat.com for more details.
Misalignment in rotating machinery wastes money, it’s that simple.
Shaft alignment is no longer reserved for large companies with internal alignment experts, or just the most critical machines; misalignment is no longer accepted as simply the cost of doing business.
Learn how new laser shaft alignment tools can eliminate difficult calculations and guess work, making precision alignment faster and easier than ever!
Topics Include:
- Symptoms and Consequences of Misalignment – the hidden costs of doing nothing
- The Benefits of Precision Shaft Alignment – energy savings, increased revenue, and safety
- Alignment Principles – how shafts have been aligned historically and recent technique improvements
- What's New in Laser Alignment Technology – how non-experts can align coupled machines like a pro in a fraction of the time
Misalignment is probably the most common cause of machinery malfunction. A poorly aligned machine can cost a factory 20% to 30% in machine down time, replacement parts, inventory, and energy consumption. The payback from aligning machinery to extend the operating life and optimize process conditions is very large. At first glance it seems that aligning two mating shafts should be a simple process. In the real world, however, there are many complicating factors. For example, either one or both shafts may be locked or have limited rotation. One or both shafts may float axially. The machine may have a soft or sprung foot at one or more locations along with a soft and/or warped baseplate. The alignment positions may become bolt bound. Keeping in mind that acceptable final alignment is typically less than 2 mils, maintenance professionals often find it very challenging to attain proper alignments.
The Ultimate Tool for Teaching Shaft Alignment
SpectraQuest’s Shaft Alignment Trainer (SAT) is the most comprehensive device on the market for shaft alignment training. It is designed for studying a wide variety of problems that can arise when two shafts are misaligned. It is a hands-on trainer for maintenance professionals. It provides a unique mechanism for studying soft and sprung foot. It is a realistic simulator with a one inch diameter shaft that fits standard couplings. Its modular design facilitates simulation of multiple element drive trains. The SAT is available in a two train and in a three train configuration. Each SAT incorporates two fully adjustable modular units featuring horizontal jack bolts, calibrated and reference dials, and replaceable feet. The three train SAT adds a fixed module which simulates a non-adjustable machine, but, the shaft can be offset and axially floated.
A complete guide on machinery oil analysis and oil condition monitoring.
Topics covered:
1. Oil sampling procedures
2. Oil analysis process
3. Oil analysis parameters
4. Oil specs and oil selection methodology
5. Case study: Car Engine
6. Case study: Power Turbine
7. Case study: Electric Transformer
The ultimate guide on constructing a FMEA process for Manufacturing, Maintenance, Services and Design.
The presentation include step by step on how to determine the failure modes, failure effects, assign severity, assign occurrence, assign detection, calculate risk priority numbers and prioritize the RPNs for action. With some examples and illustrations.
Presentation contents:
1. Determing failure modes, effects and causes.
2. FMEA team & team leader.
3. Brainstorming.
4. The basic steps of FMEA.
5. Examples.
Fault Diagnostics of Rolling Bearing based on Improve Time and Frequency Doma...ijsrd.com
The neural network based approaches a feed forward neural network trained with Back Propagation technique was used for automatic diagnosis of defects in bearings. Vibration time domain signals were collected from a normal bearing and defective bearings under various speed conditions. The signals were processed to obtain various statistical parameters, which are good indicators of bearing condition, then best features are selected from graphical method and these inputs were used to train the neural network and the output represented the bearing states. The trained neural networks were used for the recognition of bearing states. The results showed that the trained neural networks were able to distinguish a normal bearing from defective bearings with 83.33 % reliability. Moreover, the network was able to classify the bearings into different states with success rates better than those achieved with the best among the state-of-the-art techniques.
4. Some Types of Soft Foot
Rocking Soft Foot (highest values diagonally opposed)
Three types:
Short foot rocking soft foot:
Parallel airgap under foot with largest soft foot reading.
Tapered airgap (inwards) under diagonally opposite foot.
Even Rocking soft foot:
Inward tapers under both diagonally opposite soft feet.
High Foot rocking soft foot:
Outward tapers under both diagonally opposite soft feet.
Larger soft foot value on foot nearest the high foot.
5. Soft Foot Diagnosis
The type of soft foot can usually be determined by comparing
the measured values.
Different types of Soft Foot yield different combinations of
values.
Diagnosis and correction is expedited by recognizing the type
of soft foot problem, then seeking appropriate additional data
required to solve it.
6. Diagnostic Process
Number inside circle Number in parentheses
represents a laser soft represents a shimming
foot reading. correction to make.
20 (Step Shim)
25 25
3 12
0 0
Numbers in the
8 8 corners of each foot
6 10 represent feeler
16 16 gauge value of the
air gap measured.
Arrow represents direction
of taper of airgap, from
highest to lowest.
7. Rocking Soft Foot
Imagine this condition on your machine. The front right foot is short. If you
tighten the anchor bolt, the foot will bend until it can’t bend any more.
Then, if you continue tightening the anchor bolt, you’ll either break the foot
off, or distort the rest of the machine frame. If the foot does not break off...
8. Rocking Soft Foot
Suppose the short foot is now tight to the base. The frame is distorted and
under stress. How will that stress relieve itself as you loosen each of the
anchor bolts in turn, always with the others tight? Obviously, the short foot
will come up as fast and as much as you allow it to, if you loosen its bolt.
9. Rocking Soft Foot
On the other hand, if the short foot is tight, the opposite corner (the back
left foot) will also come up if you let it. So the machine “rocks” diagonally.
Now imagine for a moment what the air gaps under each of these feet will
look like, if you loosen these feet...
11. Short Foot Rocking Soft Foot
Please view our QuickTime video on rocking soft foot in action...
Available as a separate download from our Learning Center page.
12. Induced Soft Foot
Laser tools will show soft foot
values on two, three or even all
four feet of the machine. The two
highest values tend to be along
the same side or the same end of
the machine frame.
The distribution pattern of
the values does not match
any angled soft foot patterns.
13. Induced Soft Foot
Laser tools will show soft foot
values on two, three or even all
four feet of the machine. The two
If you suspect pipehighest values tend to be along
strain, the
Optalign Smart will let you check the same end of
the same side or
for that and quantify its impact
the machine frame.
on the shaft alignment, so you
can take this information to the
pipe fitters as proof of the
problem...
The distribution pattern of
the values does not match
any angled soft foot patterns.
15. Laser Alignment Systems
Rotalign Ultra is ideal for
soft foot because:
It has a high resolution
sensor for accurate detection.
It will diagnose the problem
and suggest a solution for it.
24. Conclusions
Soft Foot diagnosis & correction is always a challenge.
Consistently accurate Soft Foot diagnosis is possible.
Rotalign® Ultra makes this a breeze!