- motor, but single STEP and DIR signals

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28-01-2019
brebisson

DIR+/- and PUL+/- motor, but single STEP and DIR signals

Hello,

Sorry for I am a newbie on CNC...

I am trying to connect a motor driver with 4 wires names: DIR+, DIR-, PUL+ and PUL- to a control board that only have 3 wires: Axis_enable, DIR and STEP...

I am missing something, are these not compatible or is it that DIR- and PUL- should be grounded and STEP=PUL+ with DIR=DIR+?

Thanks!

Cyrille
28-01-2019
Clive S

Re: DIR+/- and PUL+/- motor, but single STEP and DIR signals

Quote:

Originally Posted by brebisson

Hello,

Sorry for I am a newbie on CNC...

I am trying to connect a motor driver with 4 wires names: DIR+, DIR-, PUL+ and PUL- to a control board that only have 3 wires: Axis_enable, DIR and STEP...

I am missing something, are these not compatible or is it that DIR- and PUL- should be grounded and STEP=PUL+ with DIR=DIR+?

Thanks!

Cyrille

Welcome to the forum Cyrille. Depending on the BOB you have usually you would have STEP=PUL+ with DIR=DIR+ both connected to 5V+ and STEP=PU- and Dir- going to the BOB
29-01-2019
Neale

Re: DIR+/- and PUL+/- motor, but single STEP and DIR signals

...and you can leave the axis-enable output from the from the BOB disconnected. Usually drivers are configured so that if you do not connect "enable" then the driver is enabled so a lot of people do not use the "enable" signal at all. However, in this case it sounds as if your driver does not have an "enable" input anyway so you only need to connect the step and direction wires as Clive has suggested.