Re: DIY Three Axis DRO Kit

--- In CAD_CAM_EDM_DRO@yahoogroups.com, "questo999" <questo999@h...>
wrote:
Hi Scott
Sign me up as well - jv

> Hello Scott,
> Sounds very much interesting and would like to purchase a kit from
> you. Let me know when your ready.
>
> Regards Dave Haddock
>
> --- In CAD_CAM_EDM_DRO@yahoogroups.com, "Kevin" <kratliff01@c...>
> wrote:
> > Hello Scott,
> > I am interested as well.
> > Let me know if/when your ready.
> > Regards,
> > Kevin
> >
> > ----- Original Message -----
> > From: "sshumate" <sshumate@y...>
> > To: <CAD_CAM_EDM_DRO@yahoogroups.com>
> > Sent: Thursday, July 31, 2003 02:41 PM
> > Subject: [CAD_CAM_EDM_DRO] DIY Three Axis DRO Kit
> >
> >
> > I have finally finished my DIY three axis DRO. I set out to make a
> > DRO as capable as the commercial versions but use the cheap

Chinese

> > digital scales and be low cost in its own right. The cost of the
> > DRO parts minus the scale cables and PCB should be around $60-$70.
> > I designed it to use common parts available at Digikey, Mouser, or
> > the like and be all DIP devices to make it easier for someone to
> > assemble it as a kit.
> >
> > Here are the set of features I included:
> > · Software upgradeable over RS-232 serial port with free
> > Windows software
> > · Fast scale reading with a display update rate of up to 50
> > times a second per axis
> > · Powers scales for battery-free operation
> > · Triple data sampling for glitch free readings
> > · Three axis display with super high efficiency LEDS for
> > maximum brightness
> > · Display brightness configurable in 10% increments
> > · Max display range of ±99.9995 inches (±999.995 mm)
> > · Six display resolutions: ±99.9995, ±99.999, ±99.995,
> > ±99.99, ±99.95, ±99.9 inches (±999.995, ±999.99,
> > ±999.95, ±999.9, ±999.5, ±999 mm)
> > · Incremental and absolute coordinate systems
> > · Enter zero values for both coordinate systems entered via
> > keypad
> > · Enter incremental presets via keypad
> > · Separate zero and preset buttons for each axis
> > · Centerline function
> > · Bolt hole patterns with programmable start and end angles
> > · Linear error correction factors for each axis
> > · Two data display modes: data averaging for a more stable
> > display reading when the scale is at rest or direct data
> > display to show the data unfiltered from the scale
> > · Auxiliary input for either an electronic edge finder or
> > tachometer
> > · Electronic edge finder optical coupling so any optical
> > electronic edge finder, like Enco's $19.99 Machinist's Mate,
> > can be used.
> > · Third axis configurable to display RPM or SFM from
> > tachometer for lathe operations
> > · Reversible axis directions
> > · Diameter mode (2X) for any axis
> > · Configurable auto power-off time (1 min, 5 min, 15 min, 30
> > min)
> > · Near zero warning by flashing display
> > · Configurable tool offsets entered via keypad
> > · Setup through display and keypad
> > · Setup is retained even if power is removed
> >
> > Of course, being software upgradeable means that any conceivable
> > feature could be added or changed in the future. Here are some
> > pictures:
> >
> > http://www.shumatech.com/images/dro1.jpg
> > http://www.shumatech.com/images/dro2.jpg
> > http://www.shumatech.com/images/dro3.jpg
> > http://www.shumatech.com/images/dro4.jpg
> >
> > I am going to build at least three more, one for my lathe, and two
> > for friends. I am willing to offer the DRO as a build-it-yourself
> > kit if there is enough interest to make the PCB manufacture
> > affordable. I figure if 20 or so people are interested, the PCB
> > should cost $10-$15 to produce. I am not willing to produce a
> > finished product since I am way too busy at my day job. There are
> > several commercial alternatives like Zietlow's, Positron, etc.
> > that offer a finished product, albeit for a finished price. What I
> > don't know is how many people are either willing or feel they are
> > capable of soldering the components together and machining the

case

> > themselves.
> >
> > The case machining is very straightforward consisting of three
> > windows for the LEDs and 28 holes of four different diameters. It
> > took me about two hours to machine mine going very slow to double
> > check everything. The PCB will consist of about 15-20 DIP IC's,
> > the LEDs, and 30-40 resistors/capacitors/diodes. It should take
> > someone 3-4 hours to solder together the whole thing.
> >
> > I might be willing to offer a few pre-assembled and tested PCBs

but

> > it will be on a time-allowed basis only.
> >
> > Any interest?
> >
> > -Scott
> >
> >
> >
> > Addresses:
> > FAQ: http://www.ktmarketing.com/faq.html
> > FILES: http://groups.yahoo.com/group/CAD_CAM_EDM_DRO/files/
> > Post Messages: CAD_CAM_EDM_DRO@yahoogroups.com
> >
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wanliker@a...,

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