Gallery, Projects and General > How do I??
Power supply for Nema 23 Stepper ?
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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