Step1 stepper drive board from Conqueror Design

[pistolknight]

Hi John,
I've not managed to get pictures yet! Work is crazy right now. From what the blurb on the Conqueror Design website says, the drivers are interconnected with a ribbon cable and the direction signal form all the drivers is passed through one wire using a timing sequence. So, my issue is if I use a TB6600 which I have kicking around, how do I get it just the part of the signal intended for that driver?

David

[john swift]

Hi Dave

just looked at Conqueror Design website

if this is what you have


going by the width of the ribbon cable that is daisy chained between the driver boards

I expect all the step and direction signals go to each driver board

the pictures resolution is not good enough to see but I expect
each board has links to select the correct signals for that axis


John

[pistolknight]

Yeah that's what I have. According to the information in this link under step1(R4);

http://www.eaziform.co.uk/files/CNCComps.pdf

There is only one wire which contains all the direction signals but they are selected at the board. So if I substitute the driver then I somehow need the individual part of the direction signal for that driver

Any ideas?

David

[john swift]

Hi Dave

if I have read this correctly



it looks like for up to 4 drivers
you can have separate step & direction signals to each driver

for more axis they must multiplex the direction signals on pin 7
and store it the appropriate driver board until you need to change that axis direction

I would need to see the detailed data sheet for a stepper 1 driver board or
study a board to trace the direction signal path

I would expect the rest of the circuit to follow the data sheet for the stepper driver IC's used

John

[pistolknight]

I think I'll try wiring up the TB6600 using one of those pins as the direction and see if it works. I remember reading a paragraph in that manual about the timing signal settings but can't find it now

[john swift]

Hi Dave

going by what looks like two seperate H bridges on your stepper drivers
I guess instead of the usual L297 + L298 chip set
your stepper drivers use a L297 & two L6203 H bridges



John

[pistolknight]

Hi Dave

going by what looks like two seperate H bridges on your stepper drivers
I guess instead of the usual L297 + L298 chip set
your stepper drivers use a L297 & two L6203 H bridges



John

Hi John, my two H bridges are both L298N coupled with a PIC 16F87 I/P.
If it's the H bridges that need replaced that's no big deal but if it's the PIC won't I be up the creek without a paddle? What is actually happening is that when I jog the motor in one direction then stop, then jog in the same direction again, the motor doesn't always go in the right direction.

David