On 7/11/21 11:15 PM, John Dammeyer wrote:
Essentially the process involves two touch off operations. First one side
until an LED comes on or even better the probe input goes active. At that
point touch off so the axis is set to 0.
Then you move in the opposite direction until the probe (or LED) goes active.
Divide that axis value by two and move back to that position. Now touch off
again to set the axis to 0. You are now in the middle.
Right, I can do that with a calculator and some arithmetic, and jog
there manually, but I am a mathematician, and we're known to be lazy,
so I am thinking about a button :)
It's probably possible with a fancy G-Code macro.
well, if one can write a plugin, it would probably be fairly easy (but
I am a CNC rookie) to do that, if that plugin can actually move the
tool/spindle
A number of different projects I've done have been set up that way. Find the
center of the object which is also where I've set the center in the CAM
software. Rather than top left or bottom left corner of something that has
been milled away.
right, I don't think it is not too difficult to find the center of all
kinds of shapes (geometrically or otherwise), in a math kinda way that is.
But I'm an amateur and probably do things the hard way. Often...
well, hobbyist that's trying to learn some stuff here, I am actually a
mathematician, I can calculate things, but I'd be a starving machinist
or CNC person/operator/machinist ... this weekend I created 4 proto
types of a stepper motor mount, aka scrap.
John
Ron
-----Original Message-----
From: R C [mailto:cjv...@gmail.com]
Sent: July-11-21 10:00 PM
To: emc-users@lists.sourceforge.net
Subject: Re: [Emc-users] 'automatically' go halfway between 2 points
On 7/11/21 10:47 PM, John Dammeyer wrote:
I still have my Shumatech DRO on my mill. I touch one side and zero the axis.
I then move across and jog until the LED goes on.
Then FCN 1 and the axis letter button. At that point the axis changes to minus
halfway between where I just touched off and the
original 0 point.
I move to make the DRO show 0 and then touch off that axis on the AXIS screen.
Now I have the center point between the two
edges. Since the LED indicator probe is 0.2" diameter the distance to the
center doesn't matter. Only if I am trying to find the edge
and the Shumatech can be told the diameter of the probe.
Certainly there must be an easy way to do this with LCNC? The Shumatech
software has been around for at least 13 years.
Oops,�� I didn't see this last line...�� I think so,��� either some
added functionality in the DRO� (that is where I was looking around),�
or else a plugin.�� it's probably not that hard,� if I knew how to write
a plugin for LCNC
John
-----Original Message-----
From: R C [mailto:cjv...@gmail.com]
Sent: July-11-21 9:29 PM
To: linuxcnc-users-list
Subject: [Emc-users] 'automatically' go halfway between 2 points
Hello,
in linuxcnc,? is there an easy/automated way to get halfway between two
points??? (Fort example, you'd touch off somewhere, move to some
coordinate (x, y)? (or even (x, y, z)) and go inbetween right to the the
middle of where you touched off and where the spindle is now?
thanks,
Ron
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