> On Sep 8, 2015, at 7:44 PM, Jon Elson <[email protected]> wrote:
>
> On 09/08/2015 07:30 PM, Jeshua Lacock wrote:
>>
>> I am trying to add a 4th axis to my USC from Pico Systems. My set of config
>> files is at:
>>
>> <http://3DTOPO.com/pico-univstep.tar.gz>
>>
>> I defined the new axis as W and set it up the way the other axes are setup
>> as far as I can tell. I didn’t set up the limit switches because I wasn’t
>> sure what pins to use.
>>
>> Anyhow, I can’t get Axis to launch with the W enabled. I get the error:
> At least with the old LinuxCNC, you had to define enough
> axes (without skipping over any) to include the last axis
> name. So, I think you might need to set it for 9 axes : X
> Y Z A B C U V W (note that R and P are NOT legal names for
> axes, these names are strictly defined by the RS-274 language.)
I just called it A as X Y Z A (still called W in the ini files) and seems to
work now - well at least it launches - I have to wire up the 5V and and enable
next.
>> BTW: I assume the 5V pin on the stepper drive goes to the 5V on the USC, but
>> where does the enable go (been a while!)?
>
> If your stepper drivers have a common + terminal, then that
> is right. If it has opto-inputs that can be split, it may
> be better to connect the minus of the input optos to GND,
> and the + inputs to the step and dir outputs of the USC
> board. Note that the step output of the USC is low for
> no-step and high for the step pulse. This makes a
> difference as some stepper drives do not like having the DIR
> input change while the STEP input is "on", which could be
> with the optoisolator's LED lit.
So the enable goes where again? Note for this 4th axis it is just a stepper I
am trying to drive not a servo like my other axes…
The driver has:
5V Enable Dir Step Gnd Power
I have dir, step gnd, power and now 5V figured...
Thanks!
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