I plan to run my new Acorn CNC control with Gecko G203V drivers. I see that according to drawing S14842 from the website this configuration requires the use of an external 5vdc power supply and 220 ohm resistors. Scott form Centroid tech support explained that the resistors are needed to insure a clean output signal.
I think I understand what it is doing, but I am still not clear about how to wire it up. Do I need to isolate the different axes? I probably just don't understand the theory but in my head there should be signal crossover with the way it is wired in the diagram.
Also, what wattage of resistor is required? I have some 1/4w ones, are they large enough?
Just hesitant to release any magic white smoke!
Thanks
Acorn to G203v Pullup Resistor
Moderator: cnckeith
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Re: Acorn to G203v Pullup Resistor
You would want to wire up each axis as shown on the drawing.
A lot of us use the Meanwell RD-35B to power the Acorn and supply the +5 VDC for the stepper or servo drivers. You can get them from Jameco for $11.95 + shipping.
A lot of us use the Meanwell RD-35B to power the Acorn and supply the +5 VDC for the stepper or servo drivers. You can get them from Jameco for $11.95 + shipping.
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Re: Acorn to G203v Pullup Resistor
1/4W resistors are fine for pull-ups. These maintain 5V on the data lines until a device pulls them down to ground. There is very little current involved.
Cheers,
Tom
Confidence is the feeling you have before you fully understand the situation.
I have CDO. It's like OCD, but the letters are where they should be.
Tom
Confidence is the feeling you have before you fully understand the situation.
I have CDO. It's like OCD, but the letters are where they should be.
Re: Acorn to G203v Pullup Resistor
FWIW (Assuming no internal pull ups)
5VDC = 470 ohm
12VDC = 1.1K ohm
24VDC = 2.2K ohm
All = ~10ma
5VDC = ~.05W
12VDC = ~.13W
24VDC = ~.26W
5VDC = 470 ohm
12VDC = 1.1K ohm
24VDC = 2.2K ohm
All = ~10ma
5VDC = ~.05W
12VDC = ~.13W
24VDC = ~.26W
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Re: Acorn to G203v Pullup Resistor
The drawing only shows the one axis. I have modified it to include the other two as I assume it needs to be.
I know that this is simple, but I really don't feel like cooking something.
I know that this is simple, but I really don't feel like cooking something.
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Re: Acorn to G203v Pullup Resistor
You have it right - Nice job of modifying the drawinglegacytorch wrote: ↑Fri Dec 29, 2017 10:32 pm The drawing only shows the one axis. I have modified it to include the other two as I assume it needs to be.
I know that this is simple, but I really don't feel like cooking something.