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Search: Posts Made By: jraef
Forum: LIVE PLC Questions And Answers July 12th, 2018, 12:33 PM
Replies: 1
Views: 109
Posted By jraef
The filters are mostly for compliance with the...

The filters are mostly for compliance with the tighter EU standards for EMI/RFI emissions (as opposed to the less stringent FCC regulations we have to adhere to in the US). If you are an OEM building...
Forum: LIVE PLC Questions And Answers July 12th, 2018, 09:48 AM
Replies: 5
Views: 253
Posted By jraef
The Rectifier damage might be related to your...

The Rectifier damage might be related to your power system. Most drives, especially those designed outside of North America, REQUIRE that the line power be from a solidly grounded Wye system. But...
Forum: LIVE PLC Questions And Answers July 11th, 2018, 03:29 PM
Replies: 5
Views: 253
Posted By jraef
Before you waste any more time on them, determine...

Before you waste any more time on them, determine how long they have been off line (un-powered). If more than a year sing being energized, the capacitors need to be reformed PRIOR to having ANY...
Forum: LIVE PLC Questions And Answers July 11th, 2018, 11:46 AM
Replies: 9
Views: 445
Posted By jraef
I don’t know where you heard this, but that...

I don’t know where you heard this, but that premise is grossly incorrect from the get-go. When you make contact with a live conductor in an ungrounded system, you become part of a capacitor between...
Forum: LIVE PLC Questions And Answers July 10th, 2018, 09:47 PM
Replies: 8
Views: 300
Posted By jraef
I know EXACTLY what your issue is... DC...

I know EXACTLY what your issue is...

DC Braking is totally DIFFERENT from Dynamic Braking, and it is only Dynamic Braking that uses the braking resistor! DC (Injection) Braking or DCIB means the...
Forum: LIVE PLC Questions And Answers July 5th, 2018, 12:34 PM
Replies: 2
Views: 143
Posted By jraef
Read the Knowledgebase article #29926. You likely...

Read the Knowledgebase article #29926. You likely have the wrong version. But you may want to just change over to CCW For programming, Drive Executive is not going to be kept up to date with any...
Forum: LIVE PLC Questions And Answers July 4th, 2018, 11:04 AM
Replies: 7
Views: 386
Posted By jraef
Almost all control component mfrs make one, it’s...

Almost all control component mfrs make one, it’s just that many of them don’t sell the actual pot itself, they just sell you the actuator that goes on the door and you get any pot you need with the...
Forum: LIVE PLC Questions And Answers July 4th, 2018, 11:01 AM
Replies: 24
Views: 1,200
Posted By jraef
Just a slight correction on that (and I...

Just a slight correction on that (and I understand that you haven’t used one yet). There are no “parameters” in a 527, it is fully programmed as a motion axis using motion profiles and commands, so...
Forum: LIVE PLC Questions And Answers July 3rd, 2018, 12:03 AM
Replies: 8
Views: 338
Posted By jraef
You know that you have to put your images in an...

You know that you have to put your images in an image hosting site, right? You can’t post images from your computer.

If you did use a hosting site, it must not be allowing remote calls. Some...
Forum: LIVE PLC Questions And Answers July 2nd, 2018, 10:17 AM
Replies: 56
Views: 3,977
Posted By jraef
The Tesla factory is a repurposed GM/Toyota Joint...

The Tesla factory is a repurposed GM/Toyota Joint Venture factory (called NUMI, New United Motors Inc) that was closed down for a couple of years before Tesla bought it. But GM and Toyota has...
Forum: LIVE PLC Questions And Answers July 2nd, 2018, 09:57 AM
Replies: 1
Views: 189
Posted By jraef
In my experience this is usually the result of a...

In my experience this is usually the result of a failed component inside the drive, like an A/D converter in the current sensing circuit that has failed and puts out a digital value of 65,536A, which...
Forum: LIVE PLC Questions And Answers July 1st, 2018, 12:00 PM
Replies: 56
Views: 3,977
Posted By jraef
I am periferally involved. The comments about...

I am periferally involved. The comments about “automation failing” and “cars being built by hand” are extreme exaggerations. The main issue they are having, in my opinion, is that fixture vendors...
Forum: LIVE PLC Questions And Answers June 29th, 2018, 10:33 AM
Replies: 8
Views: 420
Posted By jraef
I love it how some people seem to think that the...

I love it how some people seem to think that the meager up-front savings from buying used junk is a better business plan that continuous reliable operation of their equipment...
Forum: LIVE PLC Questions And Answers June 28th, 2018, 05:34 PM
Replies: 8
Views: 420
Posted By jraef
As it was explained to me, the Gen 4 IIGBTs used...

As it was explained to me, the Gen 4 IIGBTs used in the newest drives, like the 520s and 750s for Rockwell, are smaller/cheaper/faster because the transistors have lower switching losses because they...
Forum: LIVE PLC Questions And Answers June 28th, 2018, 05:29 PM
Replies: 5
Views: 365
Posted By jraef
Electromate used to be a separate enclosure mfr....

Electromate used to be a separate enclosure mfr. in Indiana, owned by Stahlin to supplement their fiberglass enclosures with metallic versions. Rittal bought the metallic enclosure line from Stahlin...
Forum: LIVE PLC Questions And Answers June 28th, 2018, 03:16 PM
Replies: 8
Views: 336
Posted By jraef
You need to know the base motor speed or the gear...

You need to know the base motor speed or the gear ratio of that gear motor for that. For example if the base motor speed is 1725 RPM at 60Hz to get the shaft speed of 28 RPM, that’s a gear ratio of...
Forum: LIVE PLC Questions And Answers June 28th, 2018, 02:34 PM
Replies: 8
Views: 420
Posted By jraef
You must always perform an Autotune before...

You must always perform an Autotune before running, with or without the reactor. The default settings for the motor circuit are just a best guess and are rarely correct because all motors are...
Forum: LIVE PLC Questions And Answers June 28th, 2018, 02:24 PM
Replies: 1
Views: 137
Posted By jraef
Turn off the flying restart. Most people don’t...

Turn off the flying restart. Most people don’t really need it and in fans, where back drafting can happen, this is why you don’t want it.
Forum: LIVE PLC Questions And Answers June 26th, 2018, 06:07 PM
Replies: 8
Views: 381
Posted By jraef
That drive never had an encoder feedback option. ...

That drive never had an encoder feedback option.



It sounds like something is losing communications between boards and it's not likely fixable. They were last sold new 20 years ago, kept...
Forum: LIVE PLC Questions And Answers June 26th, 2018, 10:55 AM
Replies: 12
Views: 470
Posted By jraef
42

42
Forum: LIVE PLC Questions And Answers June 26th, 2018, 03:20 AM
Replies: 7
Views: 299
Posted By jraef
It’s done all the time.

It’s done all the time.
Forum: LIVE PLC Questions And Answers June 25th, 2018, 01:14 AM
Replies: 7
Views: 334
Posted By jraef
Energy consumed in a task is a combination of...

Energy consumed in a task is a combination of work performed and losses incurred as a result of that work being performed. You cannot save energy on the work performed, the only thing you can do is...
Forum: LIVE PLC Questions And Answers June 22nd, 2018, 02:05 PM
Replies: 4
Views: 339
Posted By jraef
Basics: STO is a verified safe method of...

Basics:
STO is a verified safe method of disabling the output of the drive so that, even though there might be detectable leakage current through the power devices that can be read with a meter, it...
Forum: LIVE PLC Questions And Answers June 19th, 2018, 07:51 PM
Replies: 24
Views: 1,200
Posted By jraef
The 525 does NOT do torque control. It does SVC...

The 525 does NOT do torque control. It does SVC and it can do Flux Vector Control with an encoder feedback, but only VELOCITY FVC, not torque. It doesn't have a torque regulator like the 755 does and...
Forum: LIVE PLC Questions And Answers June 19th, 2018, 01:25 PM
Replies: 24
Views: 1,200
Posted By jraef
At that HP and that application, it’s almosr a...

At that HP and that application, it’s almosr a toss-up. But there IS a difference.

The 750 series is an “Architecture” Class drive, they are designed with the end user in mind, so they are...
Showing results 1 to 25 of 500

 
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