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Posts Made By:
Gerald D
Forum:
702. Power Supplies
Wed 13 January 2010, 22:36
Replies:
42
Transformer supply current versus Gecko output current . . . . .
Views:
47,841
Posted By
Gerald D
Leo, are you saying that you are not using...
Leo, are you saying that you are not using resistors on your geckos? (Because I can't think what other resistors you might be using)
Forum:
702. Power Supplies
Wed 13 January 2010, 22:20
Replies:
42
Transformer supply current versus Gecko output current . . . . .
Views:
47,841
Posted By
Gerald D
There are a couple of threads and posts that...
There are a couple of threads and posts that should be moved to the archives because they gave the wrong idea on the transformer size. I am glad that we are now getting more real life reports from...
Forum:
702. Power Supplies
Wed 13 January 2010, 06:01
Replies:
42
Transformer supply current versus Gecko output current . . . . .
Views:
47,841
Posted By
Gerald D
The Power Supply needs only to supply 2/3 of the...
The Power Supply needs only to supply 2/3 of the rated motor current (http://www.mechmate.com/forums/showthread.php?t=2324) <==== This addresses the 0.67 factor
Forum:
702. Power Supplies
Fri 26 September 2008, 06:11
Replies:
42
Transformer supply current versus Gecko output current . . . . .
Views:
47,841
Posted By
Gerald D
Correction: The crashing didn't raise the amps....
Correction: The crashing didn't raise the amps. It was the re-start after the E-stop that did it. That was the inrush current to a partially discharged capacitor.
Forum:
702. Power Supplies
Fri 26 September 2008, 04:31
Replies:
42
Transformer supply current versus Gecko output current . . . . .
Views:
47,841
Posted By
Gerald D
The transformer that was being monitored was...
The transformer that was being monitored was supplying 50V AC and powering 4 gecko's limited to 2 Amp each. The peak current draw on the transformer occurred during jogging and not during any...
Forum:
702. Power Supplies
Thu 18 September 2008, 11:43
Replies:
42
Transformer supply current versus Gecko output current . . . . .
Views:
47,841
Posted By
Gerald D
I don't think that the capacitor bank is intended...
I don't think that the capacitor bank is intended to actually supply the peak loads of the motors....I think their purpose is purely to smoothe the 100-120Hz ripple on the rectified AC. I think the...
Forum:
702. Power Supplies
Thu 18 September 2008, 10:17
Replies:
42
Transformer supply current versus Gecko output current . . . . .
Views:
47,841
Posted By
Gerald D
Heath, the purpose of my testing is to determine...
Heath, the purpose of my testing is to determine an adequate VA rating for transformers to be purchased. . . . . I can't figure out if you are suggesting that I might end up buying a transformer that...
Forum:
702. Power Supplies
Thu 18 September 2008, 07:50
Replies:
42
Transformer supply current versus Gecko output current . . . . .
Views:
47,841
Posted By
Gerald D
Well, the peak-hold meter has been on for a day,...
Well, the peak-hold meter has been on for a day, and a variety of programs have been air-cut. The max for the day was 119.6VA. The 300VA transformers are about to be ordered . . . . . . . but a few...
Forum:
702. Power Supplies
Sun 13 July 2008, 06:49
Replies:
42
Transformer supply current versus Gecko output current . . . . .
Views:
47,841
Posted By
Gerald D
Today I tried another experiment, with a good...
Today I tried another experiment, with a good ampmeter in the transformer's output, before the rectifier . . . . .
I wanted to see how much current is needed for a holding/static motor with...
Forum:
702. Power Supplies
Wed 09 July 2008, 10:05
Replies:
42
Transformer supply current versus Gecko output current . . . . .
Views:
47,841
Posted By
Gerald D
Mike, found this old thread: ...
Mike, found this old thread:
http://www.mechmate.com/forums/showthread.php?t=828
I think we need to move the last few posts over there . . .
Having read that one year old thread, I have...
Forum:
702. Power Supplies
Wed 09 July 2008, 09:46
Replies:
42
Transformer supply current versus Gecko output current . . . . .
Views:
47,841
Posted By
Gerald D
The rule of thumb for making a CNC power supply...
The rule of thumb for making a CNC power supply only 2/3 of the sum of the motor requirements has been around since before square versus round motors became an issue. I always thought this was...
Forum:
702. Power Supplies
Wed 09 July 2008, 06:45
Replies:
42
Transformer supply current versus Gecko output current . . . . .
Views:
47,841
Posted By
Gerald D
Mike, I would appreciate you doing those...
Mike, I would appreciate you doing those measurements - thanks!
Forum:
702. Power Supplies
Wed 09 July 2008, 06:19
Replies:
42
Transformer supply current versus Gecko output current . . . . .
Views:
47,841
Posted By
Gerald D
I had forgotten this thread.....the next few...
I had forgotten this thread.....the next few posts copied from another thread:
Mike, there is an experiment I want to do one day when I have G201 or G202 drive to hand . . . . . .
Disable its...
Showing results 1 to 13 of 13
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