Re: [CAD_CAM_EDM_DRO] DIY Three Axis DRO Kit

On Tue Aug 5 15:57:19 2003 Carlos Guillermo wrote:

>Hi Scott -
>
>That's a very nice job! Does the kit include the membrane overlay
>and the tactile buttons? If not, is that what is shown in the
>photos?
>
>Regards,
>
>Carlos Guillermo
>VERVE Engineering & Design
>
>-----Original Message-----
>From: ccq@... [mailto:ccq@...]
>Sent: Friday, August 01, 2003 12:29 PM
>To: CAD_CAM_EDM_DRO@yahoogroups.com
>Subject: Re: [CAD_CAM_EDM_DRO] DIY Three Axis DRO Kit
>
>Sounds good, but I can't afford it till next month.....:-(
>
>Do you have soft ware for anything besides windoze? (Linux?)
>
>Bill
>
>On Fri Aug 1 04:37:49 2003 Bob Muse wrote:
>
>>Hi Scott
>>Very nice job! I would probably buy one at least. Where can you
>get the
>>scales and cables and how much?
>>Bob
>>
>>
>>----- Original Message -----
>>From: "sshumate" <sshumate@...>
>>To: <CAD_CAM_EDM_DRO@yahoogroups.com>
>>Sent: Thursday, July 31, 2003 12:41 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
>
>
>
>
>
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