Re: Anyone programmed a PIC16F84A for Linistepper?

thanks that explains why the berger lahr stepper motor doesn't seem
to have to much torque. OK low end but drops off considerably at
higher rpm's. The motor namplate lists 1.15amp/phase so I'm only
feeding it about 60% of rated current.

Jim

--- In CAD_CAM_EDM_DRO@yahoogroups.com, "Zafar Salam" <zafar@s...>
wrote:

> Jim,
> I have a few vexta drives too. These are all UDX5128. It is 2.8 A

driver.

> Judging from that your driver might be 0.7 A.
>
> Zafar
>
> ----- Original Message -----
> From: "jm_fong" <jm_fong@y...>
> To: <CAD_CAM_EDM_DRO@yahoogroups.com>
> Sent: Wednesday, October 22, 2003 9:17 AM
> Subject: [CAD_CAM_EDM_DRO] Re: Vexta 5 phase drive hookup
>
>
> > I found some time this evening to look at it again, couldn't

give up

> > now that I had it all apart. Decided to clean it out really well.
> > There was alot of caked on dirt and probably some metal shavings.
> > Well on the bottom side of the board under a layer of dust is a
> > small switch I did not see before. It happens to be the step/dir
> > switch.
> >
> > Put it back together, hooked up the motor and got it to spin both
> > directions. It now works in step/dir and CC/CCW mode by flipping
> > the switch.
> >
> > Here are the Berger Lahr 10 wires to Vexta drive hookup. The

Vexta

> > terminals are labeled BLUE,RED,WHITE,BROWN,BLACK.
> >
> > YELLOW&GREY >>> BLUE
> > GREEN&BROWN >>> RED
> > RED&BLACK >>> WHITE
> > WHITE&ORANGE >>> BROWN
> > BLUE&VIOLET >>> BLACK
> >
> > In step/dir mode, CW input is step and CCW is dir. These are opto
> > inputs so the + terminals need to be connected to +5volts.
> >
> > There are 3 small pots on the board. Left one is unknown,

middle is

> > the current reduction setting, right one seems to be the max

output

> > current setting.
> >
> > This may be usefull for someone who finds these older drives on

ebay.

> >
> > Does anyone know what the max rated output current this drive can
> > put out? model UDX5107
> >
> > Regards,
> >
> > Jim