Re: [CAD_CAM_EDM_DRO] Re: Stepper motors only turning one directi on

Hi Andy,

Actually, it can happen. If the 5V is missing, the module will draw a
little power from the direction line when it is high. So, the stepper
will drive in THAT direction, but not the other! (Guess how I found out
THAT one).

Alan KM6VV

Andy Wander wrote:

> If the step signal is getting through, and the motor is moving, I don't
> think it can be a problem with the 5V line.
>
> Andy Wander
> Verrex Corporation
>
>
> -----Original Message-----
> From: coldfusionracingproducts [mailto:gokarts164@...]
> Sent: Monday, June 07, 2004 10:36 AM
> To: CAD_CAM_EDM_DRO@yahoogroups.com
> Subject: [CAD_CAM_EDM_DRO] Re: Stepper motors only turning one
> direction
>
> Dan, your correct about the 5v line.
>
> --- In CAD_CAM_EDM_DRO@yahoogroups.com, "Dan Mauch" <dmauch@s...>
> wrote:
>
>>If that older drive is like the Gecko then do you have the +5
>
> connected from
>
>>the PC to the driver?
>>dan
>>----- Original Message -----
>>From: "Peter Homann" <peter.homann@a...>
>>To: <CAD_CAM_EDM_DRO@yahoogroups.com>
>>Sent: Monday, June 07, 2004 1:24 AM
>>Subject: RE: [CAD_CAM_EDM_DRO] Stepper motors only turning one
>
> direction
>
>>
>>>I'm guessing, but, it sounds like the direction signal is not
>
> getting
>
>>>through to the drive circuitry.
>>>
>>>Since you have tested that the dir voltage is changing with
>
> direction,
>
>>>ensure that it is getting to the Centent drive. If the dir goes
>
> through an
>
>>>opto-isolator or buffer. check that the dir voltages is getting
>
> past that.
>
>>>Cheers,
>>>
>>>
>>>Peter Homann
>>>mailto:Peter.Homann@a...
>>>Adacel Technologies Limited,
>>>250 Bay St, BRIGHTON, 3186, AUSTRALIA
>>>http://www.adacel.com <http://www.adacel.com>
>>>Telephone +61 (3) 8530 7777, Facsimile +61 (3) 9596 2960
>>>Mobile 0421-601 665
>>>
>>>
>>>
>>>>-----Original Message-----
>>>>From: coldfusionracingproducts [mailto:gokarts164@h...]
>>>>Sent: Monday, 7 June 2004 1:17 PM
>>>>To: CAD_CAM_EDM_DRO@yahoogroups.com
>>>>Subject: [CAD_CAM_EDM_DRO] Stepper motors only turning one
>
> direction
>
>>>>
>>>>Here is my setup:
>>>>
>>>>Centent Cn0143 Microstepping drives (older geckos)
>>>>680oz Camtronics Steppers
>>>>24v power supply
>>>>PC with Mach2
>>>>
>>>>My motors are only turning in one direction. The distance
>
> traveled
>
>>>>is perfect though. When I jog 1 inch left then 1 inch right, it
>>>>makes it 2 inches right...
>>>>
>>>>I measured the signals coming out of the Parallel Port and I am
>>>>getting changes in the direction voltage.
>>>>
>>>>Any advice?
>>>>