Re: [CAD_CAM_EDM_DRO] checking parallel port

Hi Hugo,

If you look closely at the DB25 connectors, you'll see that there are
small numbers in the insulation, next to the pins. Or check some other
connectors until you find one that does. Then mark it on the housing
with a Sharpie marker. Insure that all 25 pins are connected 1:1. Some
DB25 connectored cables are really RS232 cables (serial) and DON'T have
all their wires!

If you setup your controller for the slowest jog possible, and connect a
multimeter set for a 5V range to the direction pin, and ground on pin
18-25 (normally, all these are ground), you should be able to make the
voltage on that pin swing from about .2V to about 3.5V when you first
command a jog in one direction, and then another. If not, insure you
are checking the right pins for the controller! Insure you have the
right port address selected!

24V 2A is fine for initial experiments. You just won't be able to move
a big load. You probably want to get +5V from the PC, as has been
mentioned many times on this list.

HTH

Alan KM6VV

hugo_cnc wrote:

>
> Hi all,
>
> Is there a way to check if there coming a signal out of the parallel
> port, with something like a voltage/amperage/resistance meter. I use
> a geckodrive 201, a 1300 oz/in motor and 24V 2A power supply. The
> power supply is just for testing, could it be that the power supply
> is not powerful enough to move the motor at all. I use the same power
> supply which also have a +5V terminal, to connect to the common
> (terminal 10) of the geckodrive, the ground is connected to the
> ground (terminal 1). I have tried different controllers Desknc,
> Master5 and Cncpro, but the motor won't move.
> I use a standard parallel cable but the numbering is a bit different
> that what is described in DeskNC. If you look at the pins numbers,
> pin one is upper left instead of upper right (the wide side above),
> could this be part of the problem.
> Thanks
>
> Hugo
>
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