[Message Prev][Message Next][Thread Prev][Thread Next][Message Index][Thread Index]

Re: CNC - Positive Quadrant



"NickMark" <nmarkowitz@xxxxxxxxx> wrote in message
news:df093553-4fd5-4180-92e8-1becec010d87@xxxxxxxxxxxxxxxxxxx
> On Monday, August 19, 2013 2:01:04 PM UTC-4, Bob La Londe wrote:
>> I have noticed that quite a lot of people position parts in CAM in the
>>
>> positive quadrant of the Cartesian plane.  It makes a lot of calculation
>> and
>>
>> planning easy so it makes sense.
>>
>>
>>
>> When you place a vise square on the table the moving jaw to accommodate
>>
>> different size stock is in the negative direction usually.  This requires
>>
>> touching off and relocating ZERO for Y a requirement for every single job
>> or
>>
>> part of a job after rotating a part.  Even those that don't require a
>> huge
>>
>> amount of precision.
>>
>>
>>
>> The obvious solution is to design a vise with the screw drive on the
>> other
>>
>> end positioning the moveable jaw in the positive direction.
>>
>>
>>
>> The less obvious but much easier solution, is to work in the X+ Y-
>> quadrant
>>
>> or move your work to X+ Y- quadrant after you have done all your
>>
>> calculations, layout, and planning.
>>
>>
>>
>> (FYI:  I tend to work with XY ZERO in the center of my stock because I do
>> a
>>
>> lot of rotations around an axis and/or symmetrical work, then I move my
>> work
>>
>> to the positive quadrant so I can just touch off rather than touch off
>> and
>>
>> calculate.)
>>
>>
>>
>> I was trying to develop some work processes that allow me to do certain
>>
>> types of jobs and setups faster, but then after typing all this it
>> occurred
>>
>> to me that for most of you guys its probably all mind numbingly obvious.
>>
>> LOL.
>
> I have several machine shops i do repairs for and its amazing to watch
> those machines work and do there thing. One of these days when i have time
> and shop owner has time wants to show me how to program one

Its easy.  Just turn off the limits and program:

M3 S40000
G00 X-5000 Y-5000 Z-2000
G00 G00 X5000 Y5000
G00 Z 1
M5
M30

Even on a machine big enough to handle that it will give the owner
conniptions.  LOL






alt.security.alarms Main Index | alt.security.alarms Thread Index | alt.security.alarms Home | Archives Home