In rotating equipment installations, there are many tools employed by the concrete pouring team, the baseplate fabricator, the rotating equipment installer, the pipe fitter, the alignment team, etc., to get the job the done as effectively and efficiently as possible. “Square, plumb, level and true” is what allows those teams to work together. “True”means something is exact or accurate. In rotating machinery, true can encompass how accurately equipment is aligned, in flatness, straightness, or rotational centerline (coupling) alignment.
Cutting corners in square, plumb, level and true is non-negotiable. If one team does not hold to this principle, it can cause significant problems for the rest of the teams in the form of delays involved in having to work around and remedy the alignment problem. We’ve heard the stories of machinery installations that have bolt-bound issues, pipes that don’t fit, baseplates that are warped, many resulting in a need for extreme soft-foot corrections. These are all symptoms of some part of the installation not holding to square, plumb, level and true. When all teams abide by this principle of square, plumb, level and true, the installation will be more efficient, have fewer delays and ensure that no costly rework will be needed to undo incorrect installation.
by Daus Studenberg CRL
Reposted from Easy-Laser®
We had a little chat with Eskil Norberg at the company Maskincentrum, who has many years of experience from measuring and aligning machine tools for the manufacturing industry in Sweden.
Because you must be able to predict the level of precision you can achieve for manufactured parts, especially when it comes to large and complicated items, items that can be tough to measure, and also costly to recover if anything goes wrong.
What does your normal work procedure look like?
We always start with a thorough analysis of the problem, and then continue by choosing the best method and instruments for the specific job.
What type of guarantees do you give before performing a job?
That depends on each individual problem I would say. Normally we guarantee that we can identify the problem, and then present a solution for how to bring the machine to a level where it can produce within tolerance again.
As I said, that depends on the problem, but for example an electronic precision level for levelling, interferometer laser for distance, speed, pitch and yaw measurements. Then a double ball bar for circular interpolation according to ISO 230-4. Easy-Laser® E940 is used for straightness, angles and spindle pointing direction. It has wireless communication which is very convenient and safe for us because the machine can be run with all safety guards on. The system also provides a measurement report directly on site thanks to the built-in documentation possibilities. This is highly appreciated by the client. Then we also use vibration analyzers to check for unbalances, bearing failures and sprocket damages.
Of course. Recently when we aligned with our Easy-Laser® on a machine for the manufacturing of steel beams 6 to 12 meters long [20 to 40 feet] we improved the accuracy of the parts from nearly rejection, i.e. 100% of the tolerance range, down to 10 to 15% of the tolerance range.
First you must understand the effects that follow on the different error conditions in the machine and how they affect the finished products. Always start from the ground up when adjusting the machine, followed by adjustments dependent on previous adjustments. What I try to say is you must adjust in the right order. You should also be aware of how possible electronic compensations affect the machine and its measurement result, so these don’t make the problem worse or maybe disguise any mechanical problem. So, always start from the ground up with the geometry of the machine, that’s my advice. To measure is to know!
by Ana Maria Delgado, CRL