Can geckodrive drive DC motor with a nominal rated voltage supply of 15V , the minimal voltage is 18V for the drive, these motors are very big with 1,2 Nm...
Pascal, Are you asking about a two wire DC motor or a stepper motor? Robert Colin Campbell Bob Campbell Designs www.Campbelldesigns.net Mach 2/3 breakout...
... Why? Having more voltage than you need isn't something that I can see as being a problem, unless that 80VDC mentioned is the same as the 80VDC that's the ...
... being a ... that's the ... Do you spec out 24 VAC for a PC board that will never use more than 5 volts ? and you have to use a voltage regulator to bring...
Pascal, Baldor makes a board that you can use with our combo breakout board (0~10 DC) to control the speed. I built one up for a customer last year. Robert...
Hi All, A novice to cnc so I'm expecting that this qualifies as a 'dumb question'! Would be interesting to see what current my steppers are actually using. ...
thanks les. the issue is using a wire brush tool. the low rev speed is just too much for the brush as it eats off the whole sculpture instead of giving a minor...
hello all, what interface would you recomend for like a dozen 2 axis + on/off gobo projectors from single pc. if synchronised good,otherwise a small delay is...
Where ever you put the ammeter it won't be designed to work at the frequency driving the stepper. We normally put a very small resistance inline say 0.1 ohm...
Thanks Mark I thought that there was probably a reason why no one was doing it...Now I know why! John ... frequency ... connect ... value etc. ... RMS ones. ...
The quality of a true RMS meter is described by it's "crest factor" It is described here; http://en.wikipedia.org/wiki/Crest_factor The problem with designing...
I don't know Dave-in my book, if it's a rapidly changing voltage, I consider it AC. But I suppose that by definition, if it doesn't reverse polarity, then it's...
You can put an ammeter in series with a step motor winding. The problem is while the motor is stopped, the current is DC. When it's moving it's an AC current....
It is actually both. DC can be superimposed on AC. That is why true RMS matters, it will give the correct reading for DC, AC, and the combination of them...
I spent a lot of time in my youth developing transistor based analogue log amplifiers, multipliers, quadratic function generators and the like, made quite a...
It's not DC, depending where you measure it's a bit of DC and a bit of AC. Or DC with a ripple on it, but the information in the ripple AC bit is important. ...
I looked around the Fluke site. Their best true RMS meter seems to be the Fluke 8846A which specs AC voltage accuracy of >4% at 100 KHz and a RMS bandwidth...
This is good stuff guys -fascinating. One Q regarding what Mariss said re: measuring the dc current on the power supply side, not the drive side. Does not the...
... I would want a general reading of the total of power the drivers are using at any time. I would not have any actual use for a meter, but having a large...
Exactly my point. So would not 4 analog meters be the qood choice ? I for total and one for each axis ? As an analog meter they are "slower" and therefore...
To a degree the conversation about RMS has been from the test equipment designer's point of view. He faces the problem of how to design an instrument that...
If all you want is a general reading then you will be all right with a meter anywhere. After running for a while you could get a feel for the maximum limit and...
I can’t remember which fluke model I have, but that has specs quoted at 100KHz and 300KHz with similar figures if memory serves me correctly. You would thus...
Thanks - thats what I thought - but was afraid I was not seeing something. I think the cap does not really affect the results. I´ll probably try this, just...
The position of the DC amp meter with respect to the capacitors affects the reading in this way; The current from the power supply's rectifier to the cap has a...
I see what you mean ... but - I did suggest an analog meter. It will be naturally resistant to these effects, no? Anyway, I may try it with an analog panel...
for the meter, I can see two actual uses. #1) kicks and giggles. a readout of approximate power consumption with no real practical use except something to...
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