Author Topic: CZ-82: Thank you SOG  (Read 18934 times)

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Offline Cosmij82

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Re: CZ-82: Thank you SOG
« Reply #30 on: December 20, 2010, 11:31:23 AM »
So, *does* anyone have access to the g-code?  A quick google search turned up a number of gun related code snippets,
and even someone who milled an entire 1911 from scratch, but nothing for the CZ82 grips.  But, like I said, it was a
*quick* search.

I could probably help do a google search, if I knew what to look for!  ;D
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Offline ck

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Re: CZ-82: Thank you SOG
« Reply #31 on: December 20, 2010, 01:46:32 PM »
I could probably help do a google search, if I knew what to look for!  ;D

G-Code is a series of numerical instructions, stored in a text file, which when run through an interpreter causes the CNC router to move and cut the shape.

The code below cuts a circle, a diamond, and a square...these code snippets, like all other code, can be used to generate all sorts of shapes, etc.  A grip is just a more complicated set of instructions, but it's the same basic stuff.

%
N1  O003 (DIAMOND SQUARE)
N2  G54  G90  G49 G80
N3  M6  T1 (1.ENDMILL)
N4  M3  S1800
N5  G0 X-.6  Y2.050
N6  G43  H1  Z.1
N7  G1 Z-.3 F50.
N8  G41 D1 Y1.45
N9  G1 X0 F20.
N10 G2 J-1.45
N11 G1 X.1
N12 G0 Z.1
N13 G40
N14 G0 X-1.590 Y1.590
N15 G1 Z-.2  F50.
N16 G41 D1 Y.990
N17 G1 X.990  F20.
N18 Y-.990
N19 X-.990
N20 Y1.09
N21 G0 Z.1
N22 G40
N23 G0 X-.6 Y1.590
N24 G1 Z-.1  F50.
N25 G41 D1 Y.990
N26 G1 X0  F20.
N27 X.75 Y0
N28 X0 Y-.990
N29 X-.75 Y0
N30 X0 Y.990
N31 X.1
N31 G0 Z.1
N32 G40
N33 M5 G49 G28 G91 Z0
N34 M3
%

This type of coding can be used to produce anything you want.  Here's someone cutting a 1911 frame from a solid billet.  Same type of instructions...just way more of them.
"When you get angry enough, grab your rifle and run outside. If you're the only one there, it's not time yet!"

Offline Cosmij82

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Re: CZ-82: Thank you SOG
« Reply #32 on: December 20, 2010, 02:14:55 PM »
I could probably help do a google search, if I knew what to look for!  ;D

G-Code is a series of numerical instructions, stored in a text file, which when run through an interpreter causes the CNC router to move and cut the shape.

Wow! This is way, way, way, above my pay grade! Hahaha!
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Offline ck

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Re: CZ-82: Thank you SOG
« Reply #33 on: December 20, 2010, 02:49:40 PM »
I'm a geek who enjoys wood working...but I'm not very good at it.  So, obviously, as a computer geek my solution is to build a robot to do the cutting for me!  Fun, fun, fun.

That's how CNC works...computer numerical control.  Simplicity, itself, really.  It's no different than an etch-a-sketch in principle, and we *all* played with those as kids, right?

Home Built CNC Hobby Router
"When you get angry enough, grab your rifle and run outside. If you're the only one there, it's not time yet!"

Offline Cosmij82

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Re: CZ-82: Thank you SOG
« Reply #34 on: December 20, 2010, 03:37:27 PM »
That's how CNC works...computer numerical control.  Simplicity, itself, really. 
It's no different than an etch-a-sketch in principle, and we *all* played with those as kids, right?

Very interesting! Where was all this when I was whittling walking sticks with my pocket knife?  ;D
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Offline ck

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Re: CZ-82: Thank you SOG
« Reply #35 on: December 20, 2010, 05:53:58 PM »
That's how CNC works...computer numerical control.  Simplicity, itself, really. 
It's no different than an etch-a-sketch in principle, and we *all* played with those as kids, right?

Very interesting! Where was all this when I was whittling walking sticks with my pocket knife?  ;D

In common use at high end shops...the home workshop crowd has only adopted it in the last decade.
"When you get angry enough, grab your rifle and run outside. If you're the only one there, it's not time yet!"

Offline geen

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Re: CZ-82: Thank you SOG
« Reply #36 on: December 21, 2010, 01:47:46 PM »
CK here are pics of the back of the grips



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Offline ck

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Re: CZ-82: Thank you SOG
« Reply #37 on: December 21, 2010, 05:08:53 PM »
CK here are pics of the back of the grips

So, there is some sculpting on the backs.  That'll make it harder to produce, since each piece will have to have both sides machined.

Oh well, it should still be relatively simple to make them, once my CNC is up and running.  Wonder if there will be any discounts on the circuit interfaces, for Christmas?
"When you get angry enough, grab your rifle and run outside. If you're the only one there, it's not time yet!"

Offline Cosmij82

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Re: CZ-82: Thank you SOG
« Reply #38 on: December 21, 2010, 11:10:42 PM »
So, there is some sculpting on the backs.
Oh well, it should still be relatively simple
to make them, once my CNC is up and running. 

For someone like me who used to make/modify semi-auto grips
by hand (with the aid of stencils, coping saw and sandpaper), this
"relatively simple" CNC process makes me green with envy!!!  :(
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Offline ck

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Re: CZ-82: Thank you SOG
« Reply #39 on: December 22, 2010, 12:12:36 AM »
For someone like me who used to make/modify semi-auto grips by hand (with the aid of stencils, coping saw and sandpaper), this "relatively simple" CNC process makes me green with envy!!!  :(
Build a CNC unit yourself, then...if you can make grips with a coping saw and stencils, then you're obviously handy.  Far handier than me.  A home workshop CNC is what happens, when a computer geek enjoys woodworking...he ends up building a robot to do it!

The machine I linked to, above, is made from some surplus rails bought on eBay (though black gas pipe can be substituted), some Roller Blade bearings, and the frame of the machine is built from MDF.  The spindle is a mounted laminate router, and the only particularly difficult part is the circuit interface which is available as an affordable kit.

Drive screws can be as "inaccurate" as allthread, but a better grade is always preferred.  The drive nuts are tapped plastic.  The motors are surplussed from old HP LASER printers.

An alternative construction method is to use commercial aluminum window rails...their offcuts are the right size and shape for each axis, and just use a thick nylon cutting board for the sled.

The interpreter software is a little complicated, but several free options exist, including an open sourced program that runs under LINUX.

Pretty straight forward, really.  The rest is just programming.

*I* envy the people like you who can do this stuff by hand, with traditional tools.  Definitely a skill that I lack.
"When you get angry enough, grab your rifle and run outside. If you're the only one there, it's not time yet!"

Offline ck

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Re: CZ-82: Thank you SOG
« Reply #40 on: December 22, 2010, 12:31:30 AM »
Easy to build Desktop CNC Mill

I think this is the simplest 3 axis machine I've ever seen.  Not much capacity, but great as a demonstration platform.

http://www.instructables.com/id/Easy-to-Build-Desk-Top-3-Axis-CNC-Milling-Machine/
"When you get angry enough, grab your rifle and run outside. If you're the only one there, it's not time yet!"

Offline Cosmij82

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Re: CZ-82: Thank you SOG
« Reply #41 on: December 22, 2010, 01:39:30 AM »

*I* envy the people like you who can do this stuff by hand, with traditional tools.  Definitely a skill that I lack.

As they say, "Necessity is the mother of invention," and I guess I was never
satisfied with "store-bought" grips (the only way to buy stuff then, before
"somebody" "invented the internet" and online shopping was born! Hehehe!

I started with modifying grips I bought, to suit my smallish hands. Then I found
a source for hardwood and I bought "cut-offs" from saw mills and carpentry shops.
I also looked for neighborhood woodworkers (a vanishing breed, if they haven't
yet disappeared altogether). And I would observe them for hours on end, as
I marvel at the fact that to them, time is inconsequential, deadlines are
non-existent and mass production is very much abhorred and detested.
They work at their own pace and produce works of art, from furniture
pieces to rifle stocks, in their own good time.:)

When I was starting out, the most intimidating thing about making grips was
doing the checkering...until I say a boy of 11 do it with just a wee wood file
and wet rag. Geez! Woodworkers belong to generations of craftsmen, and
they train their young to someday take over. I was fortunate to be allowed
to watch from the sidelines and learn without tuition fees (aside from the
box of doughnuts or whatnots that I would bring to them from time to time).
.

Offline tommypotatoes

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Re: CZ-82: Thank you SOG
« Reply #42 on: December 23, 2010, 07:31:40 AM »
Well, ck... If your steppers have encoders on them, couldn't you use a pair of grips as models and manually move the stages while tracing the pattern of the grip, and then capture the output positioning data? Punch that back into a text file and generate your own duplicate pattern? Maybe start with the stock grips to see if it's doable, first... It should get you into a mode where you could tweak the code a bit to get the effect you're looking for.  Then, cut the raw outline first, from flat stock, and do the back side routing. Flip the piece and do the top side after that... Just a thought, while drinking a cup of coffee.....

Offline Stringfellow

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Re: CZ-82: Thank you SOG
« Reply #43 on: December 23, 2010, 12:05:40 PM »
There is a lot of excess material in an '82 grip.  From my measurements, you could cut down the thickness of an '82 to 1.04" if you thinned the grips.  In other words, you could take off at least a 1/4" off the grips.  But I don't know if this is possible structurally with plastic.  I have a pair of thin wood grips coming any day now, but I don't know how thin or durable they will be.

If you could get a CNC machine up and going to produce thin grips out of metal, I suspect there would be a decent demand for them...
Well-armed liberal

Offline ck

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Re: CZ-82: Thank you SOG
« Reply #44 on: December 23, 2010, 02:33:29 PM »
Steppers don't have encoders...those are servos.  But, with a probe tip and a momentary switch I should be able to sample enough points to generate the shape.  It'd take forever, though, and require more than a bit of coding...not many interpreter programs have that functionality built in.

Good thought!

First things first.  Got to get my gun...and build my CNC machine...and...and...and...  ;)
"When you get angry enough, grab your rifle and run outside. If you're the only one there, it's not time yet!"