I have some G320s that keep dropping out the motor power. Sometimes this happens while the servo is running, sometimes at power up. When it happens at power...
Hmmmm..... I have several G320s that always fault on the first power- up each day. But, I shut off power, wait 5 seconds, then turn power back on, and...
is there such a thing as 240 to 240v isolation transformer? i am sick of bad grounding.i want to isolate my pcs and cnc machine completely from my house in...
An isolation transformer may / will / possibly fix bad grounding systems. Power transformers of any size are expensive because of their copper content and...
jeetendra, A pair of 240v to whatever wired ass backwards to each other. 240/xx -- xx/240 Much better to solve the real problem rather than try to work...
There are two sides to the safety theory on this, and some will argue that the completely isolated system is safer. With a normal system where the mains...
Mark:
Just one addition-you say that in an isolated system, if you touch one conductor, you won't get a shock. This is possible-it is also possible that you...
If it's isolated no current can flow, and it's current that kills, whether from 1V or 50,000 volts, so isolated is safe. You may however get a shock, but it...
Mark:
From "Standard Handbook for Electrical Engineer", Frank E. Fowle, E.I.C, McGraw Hill Book Company, 1933, p. 1396:
" The disadvantages of the isolated...
By exceeding the insulation breakdown spec's for one. Maybe not so critical for very low voltage power but even in the 220-240 range you are suddenly over 375...
Yeah, I did some more reading up on isolated power systems in hospitals, and found that capacitance in the transformer can allow currents of up to a few...
I also have the same problem with a particular G320 drive. When first starting up or after an extended period of power off time (and only then) the G320 drive...
Sounds like exactly what I see. Like I said, it's only the first power-up of each day that I have to cycle the power once. After that, I can shut the machine...
Probably not relevant but nearly 30 years ago I had a home-brew (wire-wrap) Z-80 based microcomputer running CP/M that would do exactly this the first time I...
Hello, I'm making a breakout board for the G251, and have a few questions. For all my other breakout boards I've made, I've always first low pass filtered the...
The current G320 is REV7. This revision has been unchanged for nearly 3 years. A new revision is assigned if so much as even the position of a single part is...
Mariss, In my case, the problem started on one axis, a few weeks after I installed the G320s. The second axis started doing it a few weeks later. There are...
The G251 has a 1uS low-pass RC filter on STP and DIR. The inputs are 3K pull-ups to 3.3VDC, 10K series resistors to the CPLD inputs, 100pF caps from inputs...
... It sounds like your 1933 book is talking about high tension transmission systems, where the capacitance to ground is VERY substantial, both in the...
Try and think about this from what you know, not books almost 100 years old before electronics as we know it existed. We are playing with the small stuff here...
hi all, thanks everyone for their input on isolation transformer. actually,i am thinking for a cnc+computer combo to run off isolated from the house. i am...
Mark:
Thanks for the explanation, but I don't think you should necessarily knock a book because it was written is 1930. They knew a lot about electricity in...
Hi Andy In many cases a lot of the books of the long past can be more informative than the newer ones. I rely an awful lot on my Dad's and Uncles books from ...
I would do as Mariss suggests. Temporarily add a normally open momentary switch connecting the +5 from the encoder terminal on the Gecko to the err/res line. ...
I recently converted by BP clone knee mill, using servo motors and G320s. It's working beautifully. A friend, with an identical machine, just completed...
Ed, That is the first thing we'll try. I actually have a pair I bought for mine a few weeks ago. But, they've got me a bit confused. Given the weight of the...
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