Comments for EMA Inc.

Comment on Service Report: Retrofitting an old PLC by Jessie Phillips

Jessie Phillips — Tue, 20 Jul 2010 19:08:22 +0000

You guys really are terrific.. most folks would have walked away from that.

Comment on EMA’s underground business: tunnel boring machines by Eddie Mayfield

Eddie Mayfield — Fri, 18 Jun 2010 12:41:26 +0000

Jessie, our expertise is primarily in the electrical/electronic portion.. so I may not explain this well.. but the tunnel engineers are careful to analyze the types of earth they are tunneling through, and that determines how the materials created by the tunneling are removed.

When using pumps, they inject liquid into the cutting area, and the only “pulverizing” is done by the cutting head itself. The liquid and material is then pumped to the surface by large horsepower pumps, where it’s separated, and the liquid is then pumped back into the tunnel to be used again.

Look at the Herrenknecht video link I put near the end of the article, it has a great animation that explains this.

Comment on EMA’s underground business: tunnel boring machines by Jessie Phillips

Jessie Phillips — Fri, 18 Jun 2010 12:33:03 +0000

Curious about liquifying and pumping out the earth that they tunnel through.. how are they doing that? Do they pulverize the rock into powder?

Comment on EMA’s underground business: tunnel boring machines by Al Smitherman

Al Smitherman — Thu, 17 Jun 2010 04:10:08 +0000

Really interesting look at a fascinating technology. Thanks for posting this.

Comment on Give it Time by Dr. John Maxwell by J.D. Meier

J.D. Meier — Thu, 27 May 2010 00:40:09 +0000

Maxwell really sets the bar for leadership and I like the way he paves paths and blazes trails for others.

Comment on Service Report: Ross Hill Load Commutated Inverter by Adam Miller

Adam Miller — Thu, 20 May 2010 17:45:06 +0000

I didn’t have any idea that you guys could work on that sort of equipment. Thanks for the post.

Comment on Medium Voltage Drive Market by Susan Campbell

Susan Campbell — Thu, 06 May 2010 04:10:36 +0000

Very interesting article.. thanks for sharing.

Comment on Energy Savings with Variable Frequency Drives by A Peterson

A Peterson — Tue, 27 Apr 2010 16:05:03 +0000

After being skeptical of how much energy a drive could save, we installed 2 on some large fans. The energy savings were amazing, and I was surprised at how much more gently the fans started as well on the drives. We recovered the entire cost of the installation in just over 12 months, and now enjoy the benefits at essentially no cost to us. It is wonderful technology.

Comment on Yaskawa “B” bypass vs Yaskawa “N” bypass by Harold Newberry

Harold Newberry — Thu, 22 Apr 2010 15:37:02 +0000

My experience with the “B” cabinet is very good. I think that for us maintenance people, its an easier drive to work with than either the N or the L.

Comment on Organic Technology by Derrick Jeter

Derrick Jeter — Wed, 21 Apr 2010 01:42:36 +0000

Good job Eddie….Very funny article…