[gene8522]

Hi Guys,
I have a DIY 3 axis wooden CNC that I'm planing to up grade to a R&P aluminum extruded Joe's EVO look alike. I Have 3 steppers driving my CNC but i will need to add a 4 steppers for the R&P set-up. At present I'm using three Micro Stepping Drivers CW230 and I know that I will have to add a forth stepping driver for the 4th stepper motor. I will need to have two motors on X axis spinning in opposite directions. I have read that I can do this with the use of a "Hex Inverter". I have found the hex inverter that I need but I'm not at all sure about the wiring between the BOB and stepper driver. Could anyone help with a wire diagram for the 14 pin Hex Inverter from the BOB to stepper driver?

[john-100]

it would be easier to reverse the connections to 1 coil on the 2nd X axis motor

John

[gene8522]

it would be easier to reverse the connections to 1 coil on the 2nd X axis motor

John

Thanks John for the come back,
May I ask which wires would I switch? I am using Bipolar Parallel steppers so would that be ---- A+ to B+ or A+ to A-?

Gene

[john-100]

Hi Gene

reverse the two wires to any 1 coil

either A+ & A-- or B+ & B--

John





coil A reversed

[gene8522]

Thank John-100. I knew that there had to be a simple answer..........:cheers:
I'll print this and save it.

[john-100]

Hi Gene

I forgot to ask last time

which breakout board do you have ?

boards using 74hc244 or 74hc245 (20pin) IC's to buffer the outputs are more likely to be able to drive two CW230 stepper drivers than
boards using 74hc14 (14pin) IC's

an alternative solution is to slave 2 axis in software as in this post
http://www.cnczone.com/forums/steppe...726-cnc-2.html


John

[gene8522]

Hi John,
I'm not sure what BOB I have but here is a photo if that helps answer your question.

Attachment 335336

[john-100]

Hi Gene

good its a C10 board from CNC4PC

Attachment 335338

the board uses 74ACT245 octal buffers
unlike other boards they (CNC4PC) only use 4 buffers in each IC to buffer the outputs instead of all 8 buffers
so you should be able to connect 2 stepper drivers to 1 output if you don't want to slave 2 outputs in software


John

[mactec54]

gene8522

Most control software you can reverse the motor direction, if you are using Mach3 it is very easy