Re: [CAD_CAM_EDM_DRO] Inverse of G-code

Does your cam use a G31, G32? This will reverse the sign of the X and
the Y axis. Depending on you software to produce the gcode, whether you
can reverse the Z axis move. You will probably need to scale your image
down a bit for the punch side to allow for the thickness of the copper.
I have a program in the files section, although it doesn't mirror the x,
y, z axis, I don't think it would be that hard to add that feature
in. Let me know.

W. P. McGown wrote:

>I have a Gcode file that makes a negative image for a die/mold that I have
>used to cast some ceramic tiles from. Now I would like to make these same
>forms in copper by using a press. No problem on making the negative die but
>the positive one is going to be a bit of trouble if I have to code the thing
>by hand.
>
>Does anyone know of software or a technique that could be used to "invert"
>the G-code?
>
> Many thanks in advance.
>
>Bill
>
>"If nobody makes you do it, it counts as fun"-Hobbes
>----- Original Message -----
>From: "Jon Elson" <elson@...>
>To: <CAD_CAM_EDM_DRO@yahoogroups.com>
>Sent: Thursday, September 18, 2003 10:25 AM
>Subject: Re: [CAD_CAM_EDM_DRO] Servo motor question
>
>
>
>
>>Mina Aboul Saad wrote:
>>
>>
>>
>>>Hi group,
>>>
>>>I'm trying to do this for the first time, I'm planning to change the old
>>>Fanuc controller on a German lathe, with a new one.
>>>Servo motors are Siemens with the following specs:
>>>- Dc Servo, permenant magnet.
>>>- 1.03 KW
>>>- 2000 RPM
>>>- 176 V
>>>- 7.1 A
>>>- Max. torque 5 Nm
>>>With an optical encoder, +5v and 1024 count/turn.
>>>
>>>I was thinking of using Turbocnc with Gecko drivers.
>>>
>>>Will this setup work?
>>>
>>>
>>>
>>There's one big Uh-Oh! That is the motor's 2000 RPM at 176 V.
>>That means you will only get 1000 RPM at 80 V, the limit for the
>>Gecko. You can figure out how this will affect your feedrates,
>>and then decide whether to go ahead, swap motors, or whatever.
>>Rutex has a higher voltage servo driver. See
>>http://www.rutex.com/home/index.html for info on their products.
>>
>>
>>
>>>What is the required DC supply I need to build?
>>>
>>>
>>>
>>It should be no more than about 76 V for a Gecko drive.
>>
>>
>>
>>>Which Geckos to use G320 or G340, and what is the differnce between them.
>>>
>>>
>>>
>>>
>>The G340 has a step pulse multiplier. This is useful if the servo motor
>>
>>
>has
>
>
>>a high resolution encoder, and the computer is very limited in the step
>>pulses per second it can produce. Your motors have 256 cycle/rev encoders
>>
>>
>
>
>
>>that produce 1024 quadrature counts, if I read your data right. At 2000
>>RPM, that will produce 2000 * 1024 = 2,048,000 counts/min, or 34,133
>>counts/second. If your computer can produce 34000 steps/second, you
>>don't need the G340. And, using the step muliplier reduces the resolution
>>of the servo. But, the voltage problem is the big one.
>>
>>Jon
>>
>>
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>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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>Subscribe: CAD_CAM_EDM_DRO-subscribe@yahoogroups.com
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>URL to this group: http://groups.yahoo.com/group/CAD_CAM_EDM_DRO
>
>OFF Topic POSTS: General Machining
>If you wish to post on unlimited OT subjects goto: aol://5863:126/rec.crafts.metalworking or go thru Google.com to reach it if you have trouble.
>http://www.metalworking.com/news_servers.html
>
>http://groups.yahoo.com/group/jobshophomeshop I consider this to be a sister site to the CCED group, as many of the same members are there, for OT subjects, that are not allowed on the CCED list.
>
>NOTICE: ALL POSTINGS TO THIS GROUP BECOME PUBLIC DOMAIN BY POSTING THEM. DON'T POST IF YOU CAN NOT ACCEPT THIS.....NO EXCEPTIONS........
>bill
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