Help please. Dip switches and mach 3 settings

[john swift]

going by the photo linked to in post 38

it looks like the BOB is as I expected with pull up resistors on the outputs



unless you connect the - enable to a BOB output
having the + enable connected to +5V will have no effect

what could be a problem is having the BOB's output optoisolator being connected to another optoisolator inside the stepper driver

having the step signal passing through two optoisolators could distort the pulses too much at high step rates

John

PS
in the photo of the BOB you can see two links that connect the +5V in to Vdd and connects the two GND's together so you don't need the external wire link as in post 37

PPS
a while ago I produced this circuit diagram from photos taken from the net



what I need to confirm is the connection of the 10K resistor connected to the 74HC14 input
it was not clear from the photos if the resistor was a pull up to +5v or pull down to GND