Re: [CAD_CAM_EDM_DRO] Help?? CNC PCB Drilling Machine

Hi Sammy,

A few months ago I helped build a similar pcb drilling machine for the final
year students of a local engineering school. They used drawer channels for
the x, y and z ways. X and Y axes were driven by a couple of nema23 steppers
through timing belts and the z axis was driven by a screw through dc motor
and limit switches. Base of machine was of mild steel plates and y and z
axis channels rested on aluminium brackets. Allegro's 5804B chip was used to
drive the steppers. You can use turbocnc as the controller to feed step &
direction signals. I can send you sketches of the the structure if you wish.

Regards,
Zafar

----- Original Message -----
From: "Sammy" <sammytaggart@...>
To: <CAD_CAM_EDM_DRO@yahoogroups.com>
Sent: Wednesday, August 06, 2003 4:15 AM
Subject: [CAD_CAM_EDM_DRO] Help?? CNC PCB Drilling Machine


> Hello all,
>
> Firstly, my apologises for my "newbieness". Im very sorry if i annoy
> anyone cause what im doing sound a whole lot easier than what u folks
> are all talking about.
>
> so, Im a final year technology and design (With education..teacher
> to be) student in Belfast, northern ireland and as part of my final
> year assignment i have chosen to design and manufacture a CNC PCB
> Milling machine.
>
> As most schools in northern ireland, i am forced to use PCB Wizard as
> the mask creating software, but it produces an nc .drl file hich i
> can easily convert to g-code using a converter i found on the net. I
> have then chosen to use Master 5 to control the system via parallel
> port. this i think is the most of the software/gcode problems sort.
> the next and most ambitous problem is making the actual machine.
>
> Stepper motor control of and xy table with a gantry type z axis i
> feel would probably work best for me. My question is,
>
> what do i need to make such a board
>
> Is anyone aware of the stepper motor drivers required to operate a
> stepper frm the parallel port?
>
> What sort of stepper
>
> How do i make the xy table....
>
> im pretty new to all this so sorry again.
>
> Also i cant really buy "kits" or a complete xy table..i cant just
> assemble the thing..i must design and make the whole thing so thats
> going to be time consuming.
>
> I'd really appreciate help on this one. I'm only 22 with no
> qualifications/experience on this topic
>
> Any education from anyone about ANY of this stuff would be much
> appreciated
>
> THANK YOU
>
> Sammy Taggart
>
> Northern ireland
>
>
>
>
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