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| Power supply for Nema 23 Stepper ? |
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| Buell:
This is what I have ended up with and it works Hope the loop over cables is evident !! Did my best! |
| Buell:
With regards to cable sizes when I wire this for good can i just use standard .75 cable ? nema 23 motors. |
| awemawson:
0.75 CSA copper cable is supposedly good for 14 amps |
| John Swift:
Hi Buell on the pulse generator board I have now found out that the clock , direction & enable outputs have a 100ohm resistance in series the enable and direction switches do switch between 0V & +5V a NE555 IC is connected in its astable mode to run as an oscillator the output pin 3 is conncted to the CLK terminal via a 100 ohm resistor I have added the details to your diagram the effect of these 100 ohm resistors is , depending on the current limiting resistors inside of the stepper driver the pulse generator output will switch between +0.75V and + 4.25V or +1V and +4V not the 0V to +5V I initially expected in an earlier post inside various stepper drivers the manuals indicate the input opto-isolators have a resistor between 200 & 300 ohms to limit the LED current to a safe value with a 5V input John diagram re saved after correcting typo |
| Buell:
--- Quote from: John Swift on December 03, 2018, 01:05:42 PM ---Hi Buell on the pulse generator board I have now found out that the clock , direction & enable outputs have a 100ohm resistance in series the enable and direction switches do switch between 0V & +5V a NE555 IC is connected in its astable mode to run as an oscillator the output pin 3 is conncted to the CLK terminal via a 100 ohm resistor I have added the details to your diagram the effect of these 100 ohm resistors is , depending on the current limiting resistors inside of the stepper driver the pulse generator output will switch between +0.75V and + 4.25V or +1V and +4V not the 0V to +5V I initially expected in an earlier post inside various stepper drivers the manuals indicate the input opto-isolators have a resistor between 200 & 300 ohms to limit the LED current to a safe value with a 5V input John diagram re saved after correcting typo --- End quote --- THANKS VERY MUCH FOR THIS ....BUT WHAT DOES IT MEAN TO SOMEONE THAT DOESNT SPEAK A WORD OF ELECTRONICENGLISH ! or just layman terms. You will have to forgive me...looking at that reminded me of so many lessons at school where I couldn't understand what the hell the teacher was talking about ! But i do appreciate the effort you made to find out the details so thank you again. |
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