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Customer Testimonials

Just a note to let you know, we completed alignment of the Mazak Slant bed lathe shortly after you and Guy finished your visit with us... Read more

Christopher G. Equipment Engineer, Rolls Royce Corporation

We have used the system now, and it really is good. We used it on an old (circa 1950) crusher motor (200 hp 550 RPM) with a horrible motor base...
Read more

Jeff F., Engineer Roanoke Cement Company

The machine move stage is the most critical step in any alignment. Behind its great graphics, this is where we have seen the very high resolution and accuracy of the system... Read more

Paul Frecker, IS Tecnik

ROI on our L-742 [Roll Alignment system] was 3 months! Thanks for a top-shelf ‘rubber meets the road’ solution.

John M. Shurtape Technologies, LLC

We have been using Hamar laser equipment for about 14 years and have had nothing but great support from your staff all around, from your... Read more

Charles Monestere, Operations Manager ‐ Alignment Services Mechanical Dynamics & Analysis, Ltd

We adopted the use of the Hamar Laser Alignment System since 2005 and have not looked back since. It has proven that with its high accuracy... Read more

Cheng L. C., Engineering Manager Mitsui Copper Foil Malaysia

In late 2010 our company received an order to develop a system that would make precise measurements of inner diameter and non - linearity of refurbished oil rig pipes... Read more

Yuri Bochavich, Diezel Test Kit, Ltd. Ekaterinburg, Russia.

Machine tools - industry overview

"Why Machine Tools Continue To Have Quality Problems after Linear Calibration"

Ok, so you've just spent two shifts completing the linear calibration on your machining center and the first batch of parts that comes out are out of tolerance. You ask, "What in the world could be wrong now?" If this has ever happened to you, chances are you've fallen into the linear positioning trap.

Why do we say trap? Most machine tool manufacturers only focus on linear positioning. Ask them for specifications on machine tool geometry and you get a lot of hemming and hawing. Why? Well, it's because linear positioning is an easy thing to calibrate. A good quality machine can probably position to .00005" or so without much trouble. That same machine, however, may, over time, have trouble holding .001"/ft. for straightness or squareness. This is especially so when you consider that seasonal temperature variation can have a profound impact on a machine tool's ability to hold alignment tolerance.

And because comprehensively checking alignment using conventional methods (levels, squares and straightedges) takes a lot of time, manufacturers of mass-produced machine tools have had to rely on their machining processes, designs and some quick go-no-go fixtures to "calibrate" machine geometry. As a result, they focus on linear positioning as the "true judge" of a machine's quality and performance and are very successful at promoting the linear positioning of their machine tools as the sole indicator of quality.

While it's true that linear positioning is indeed important, it is NOT the only story. Calibrated linear positioning will not correct a face cut that is out of tolerance due to a straightness problem or an elliptical hole in a part due to machine squareness problems. Even today's new controllers that purportedly correct geometry errors by programming geometry offsets cannot correct a column-squareness problem on a boring mill (the hole will be in the right place but will be elliptical). These and many other part-quality issues can only be cured by proper geometric alignment.

The right way to calibrate machinery is to check the geometry (alignment) FIRST. Once the machine has been properly aligned, then, and only then, should the linear calibration be calibrated.

Whether you use indicators, electronic levels, interferometers or geometry lasers, like our L-743, you will cut better parts, have less downtime, and save more money by checking BOTH alignment and linear positioning. So go fight the production manager, talk with the plant manager or who ever else will listen, but start aligning those machines and do it NOW.

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