Search found 53 matches

by Crowbar
Fri Aug 27, 2010 3:18 pm
Forum: Computer Programming
Topic: Compact flash IDE ?
Replies: 4
Views: 1479

Re: Compact flash IDE ?

I have a large 8 axis lathe at work using a CF card drive in a 486 industrial PC running a C++ CNC program under DOS that has been trouble free in regards to the CF card drive for the last few years.
by Crowbar
Sat Oct 20, 2007 3:45 pm
Forum: General Discussion
Topic: 480VAC Indicator Panel LED
Replies: 22
Views: 5888

How about a standard 480VAC xfmr style panel indicator with an LED replacement for the incandescent bulb? Most of these operate off of 12 or 24 VAC and an LED replacement is readily available.
by Crowbar
Thu Sep 20, 2007 8:18 pm
Forum: General Discussion
Topic: Identifying electric motor lead wires
Replies: 6
Views: 3401

One of the best books on the subject... http://books.google.com/books?id=PpW71BbD8OYC&dq=&pg=PP1&ots=JC7RlaFtuC&sig=zMF8HpCmO7gj5BsD3HtlVYq-Ww4&prev=http://www.google.com/search%3Fq%3Delectric%2Bmotor%2Brepair%2Brosenberg%26ie%3Dutf-8%26oe%3Dutf-8%26aq%3Dt%26rls%3Dorg.mozilla:en-US:official%26client...
by Crowbar
Thu Sep 13, 2007 5:30 pm
Forum: General Discussion
Topic: motor connections
Replies: 1
Views: 1293

by Crowbar
Sun Apr 15, 2007 1:03 pm
Forum: General Discussion
Topic: transformer info
Replies: 15
Views: 3739

Turns ratio= 4:1
ohm's law for the rest...

30v @ 6.6 Amps
by Crowbar
Sun Apr 15, 2007 12:58 pm
Forum: General Discussion
Topic: electric solenoids
Replies: 5
Views: 1832

They will typically have a laminated armature with shading coils, if they don't completely close or chatter excessively they will burn burn out in short order.
by Crowbar
Thu Jan 25, 2007 6:18 pm
Forum: General Discussion
Topic: catching an intermittent
Replies: 8
Views: 2088

Installing first out indicators costs money initially, but reaps returns throughout its lifetime everytime someone needs to fix it, I'm all for going cheap, but if your fixing these things for a living there's no time to guess.
by Crowbar
Tue Jan 23, 2007 6:12 pm
Forum: General Discussion
Topic: catching an intermittent
Replies: 8
Views: 2088

Not knowing what your budget is, all I can suggest is what I use at a forging mill... http://www.protectioncontrolsinc.com/teleflt.htm . These are cheap compared to full blown annunciators, but still run around $800. They do offer first out indication and can be cascaded for more monitoring points. ...
by Crowbar
Mon Jan 15, 2007 6:35 pm
Forum: General Discussion
Topic: Vintage programable controllers
Replies: 4
Views: 1700

Here's the link for MEDOC

http://www.plcman.co.uk/page6.html
by Crowbar
Sun Jan 14, 2007 1:25 pm
Forum: General Discussion
Topic: Vintage programable controllers
Replies: 4
Views: 1700

The mistubishi is not a problem, should be able to use MEDOC, their DOS based software, it should still be available through their website, just try a Google search, the 32 bit version should be 2.41 if I remember right.
by Crowbar
Fri Nov 24, 2006 9:34 pm
Forum: General Discussion
Topic: Car Battery Questions
Replies: 20
Views: 6568

Anything above 13.8V is to be suspected.
Not true! 14.2 v is the typical spec for a healthy charging system, over 14.5 is reason for suspicion.
by Crowbar
Sun Nov 19, 2006 1:01 pm
Forum: General Discussion
Topic: Amperage, DC vs. AC
Replies: 4
Views: 1577

Amps are amps, it shouldn't affect the thermal-magnetics characteristics too much, although the DC arc is much more difficult to snuff out, therefore a DC rated breaker should be used.
by Crowbar
Sat Feb 25, 2006 7:58 am
Forum: General Discussion
Topic: running a vfd on single phase
Replies: 4
Views: 1110

Re: running a vfd on single phase

What is your motor voltage, we need to know that first. Remember that single phase capacitor motors will not operate off of VFDs. Most likely you will need a 220 3 phase motor and a 5 hp 220 VFD.
by Crowbar
Tue Jan 24, 2006 2:24 pm
Forum: General Discussion
Topic: Blocking direct sun from large air cooled electric motor
Replies: 15
Views: 3319

Re: Blocking direct sun from large air cooled electric motor

Most motors are designed for a temp rise of 40^C over ambient, depending on the insulation of the windings you could be good for 221^F (Class A) to 356^F (Class H). There might not be a problem with the windings, however you may be looking at a potential bearing failure, it would be wise to grease t...
by Crowbar
Wed Nov 30, 2005 1:05 pm
Forum: General Discussion
Topic: 3000 watt inverter
Replies: 6
Views: 1188

Re: 3000 watt inverter

I see that I erred on the current figure, however the connections should not offer a voltage drop, if they did they would have to be poorly made to be significant. 250 amps on an 8AWG will for any amount of time melt the insulation off regardless. 8AWG bare in free air is rated for 98 amps, that wou...