Subject: RE: Feedback from MTS-EP

Date: Wed, 7 Aug 2002 11:05:00 -0500

From: "Berkner, Pat" <Pat.Berkner@mts.com>

To: "Larson, Rod" <Rod.Larson@mts.com>

CC: "Berg, Allen" <Allen.Berg@mts.com>



Rod,

What you are explaining is very strange. I have not seen anything like

this.

I don't know why you need to wait 30 seconds before you enable the

drive.

I copied Allen Berg on this issue. He will contact you concerning this

problem.



Best Regards,



Pat Berkner



-----Original Message-----

From: Rod Larson [mailto:rod.larson@mts.com]

Sent: Tuesday, August 06, 2002 4:33 PM

To: Berkner, Pat

Subject: RE: Feedback from MTS-EP



Pat,

After applying 110V, the "enable" cannot be jumpered until about 30

seconds

have passed. If the jumper is installed, then power applied, the motor

NEVER runs. The jumper has to be open until the controller has gone

through

some kind of start-up. This is not only quite annoying, but will cause

us

some strange hardware just to get around this "feature". A time-delay

relay

is not cheap and becomes a reliability issue. I am not pleased about the

prospect to re-layout the PC board either to accomodate CPU control of

this

controller input. Let me know if we can somehow get around this

difficulty.

Rod Larson



>From: "Bushey, John" <John.Bushey@mts.com>

>To: "Berkner, Pat" <Pat.Berkner@mts.com>, "Benecke, Dierk"

>        <Dierk.Benecke@mts.com>

>Cc: "Larson, Rod" <Rod.Larson@mts.com>

>Subject: RE: Feedback from MTS-EP

>Date: Thu, 25 Jul 2002 16:23:36 -0500

>

>

>I'll let Rod comment on what he is seeing on SFD start up.

>

>Also Dierk, it  is the SFA that has the commutation tick, as Pat and I

>have discussed.

>

>John

>> -----Original Message-----

>> From:        Berkner, Pat

>> Sent:        Thursday, July 25, 2002 4:14 PM

>> To:  Benecke, Dierk

>> Cc:  Bushey, John

>> Subject:     RE: Feedback from MTS-EP

>>

>> Dierk, John,

>>

>> It should not take 35 seconds for the SFD to power up! Assume you are

>> running on 110. This works very well here.

>> Give  me a yell.

>>

>> Pat

>>

>>       -----Original Message-----

>>      From:   Benecke, Dierk

>>      Sent:   Thursday, July 25, 2002 3:58 PM

>>      To:     Fenstermacher, Brian; Berkner, Pat; Hendrickson, Eric

>>      Cc:     Walraven, Perry

>>      Subject:        Feedback from MTS-EP

>>

>>      All:

>>              I spoke with several of the engineers in Eden Prairie

>> and received the following feedback.  The main impression I got was

>> that they do not feel that our products are reliable.  The MPA-50-460

>> that they use fail on a regular basis, several MP-FLX have failed,

the

>> ServoBlok has an annoying commutation tick, and the SFD230 has

several

>> annoyances.

>>

>>

>>      Brian:

>>              The following are requests for the MP-FLX.

>>

>>      1) Notch Filters - they would like to have at least one notch

>> filter and two would be sufficient.

>>

>>      2) Field Buses - Sercos is the first choice if the system

>> requires coordinated motion and Profibus is the first choice for

basic

>> system control.

>>

>>      3) Absolute Encoder - SinCos (Stegmann) is the first choice for

>> absolute or high-resolution feedback.

>>

>>      4) They would prefer a real-time o-scope.  This requires higher

>> speed communications in the drive, which they have requested in

>> general.  They like Modbus for HMI communications when a field bus is

>> not used.

>>

>>      5) They have been using Animatics smart motors for moving tire

>> patches because no cabinet is required.  We can probably offer a

>> similar solution if we mount the ServoBlok on the back of a motor.

>> Requires research.

>>

>>      Eric:

>>              They indicated that they returned several MP-FLX drives

>> for repair, but they do not know why they failed and they did not get

>> a failure analysis.  Can you provide a list of the returns from MTS

>> and an analysis for each?

>>

>>      Pat:

>>              John Bushy is using SFD230 drives for a desk-top

>> earthquake simulator.  He worked around some issues (not specified)

>> and is satisfied with the size and performance; however, he said that

>> the drive takes 35 seconds to power-up.  Is this normal?

>>

>>

>>

>>

>>      Regards,

>>

>>      Dierk Benecke

>>      Product Manager, Custom and Military Electronics

>>      MTS Systems - Automation Division

>>      151 Domorah Drive

>>      Montgomeryville, PA 18936

>>      voice: 215-619-4920 x 245

>>      fax:    215-619-4999

>>

>

