[GrahamIT]

Hello everyone,

Just a quick question, has anyone had experience of this cheap breakout board please?

CNC 5 Axis Breakout Board interface for Stepper Motor Driver Mill/Input Power:5V | eBay

I'm an electronics engineer and was thinking of making a taylormade board myself, but at this price it's hardly worth the effort.

Eventually I'll upgrade to an ESS Smooth Stepper and 3 of these, but for initial playing around I thought this would be a start at least. I've got 3 Geckodrives for my steppers already.

Thanks

Graham

[109jb]

I have one of those on my mill drill and it has worked just fine for me.

[john-100]

Hi Graham ,

the breakout boards do work but like the tb6560 boards they do break a few design rules

not connecting a +5V supply to pin 14 of one of the 74HC14 IC's
or not connecting the unused input pin 13 to 0V or +5V - OK for a 7414 but not the CMOS version !!!!
the 1K resistors connecting the 74HC244 output to the boards enable output terinals could be a problem with some stepper drivers


John

[GrahamIT]

Hi Graham ,

the breakout boards do work but like the tb6560 boards they do break a few design rules

not connecting a +5V supply to pin 14 of one of the 74HC14 IC's
or not connecting the unused input pin 13 to 0V or +5V - OK for a 7414 but not the CMOS version !!!!
the 1K resistors connecting the 74HC244 output to the boards enable output terinals could be a problem with some stepper drivers


John

Thanks Guys.. John in particular that's very helpful, thanks. Nothing there that can't be fixed easily, so all in all a good buy at under £10.00

[john-100]

Hi Graham ,

the circuit notes are my attempt to fill in some of the details missing from the breakout boards manual ,eg the signals on the 9 , 11 and 13 pin connectors

John

PS on the board there is a resistor thats only connected to one terminal ! -
its one of the seven resistors that I removed from between the two 74HC244 IS's in the picture

[GrahamIT]

Hi Graham ,

the breakout boards do work but like the tb6560 boards they do break a few design rules

not connecting a +5V supply to pin 14 of one of the 74HC14 IC's
or not connecting the unused input pin 13 to 0V or +5V - OK for a 7414 but not the CMOS version !!!!
the 1K resistors connecting the 74HC244 output to the boards enable output terinals could be a problem with some stepper drivers


John

I wonder why they connected dir X to both pins 14 and 17?

[john-100]

Hi Graham ,

its my error

when I've copied from an earlier diagram used in post 9 in this thread :-

http://www.cnczone.com/forums/genera...out_board.html

I've typed X dir for pin 17 instead of B dir !!

John

[alcor]

Hello,

I'm not electronics engineer and CNC hobbyist beginner, I'd like to get your advices :

Is this breakout board only able to work with opened circuit limit switches ?
(Is there any workaround to work with closed circuit ?)

Is this breakout board never "resetting" DB25 state after a limit is reached ?
My card is rising state on all input pins - 10,11,12,13,15 - when only one limit is reached and did not release state after limit switch is released.
(Is there any workaround to reset state automatically ? i'd like to use one switch to probe surface).

thanks