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Messages - zarzul

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121
Nice work!!

Arnie

122
Works in progress / simple turn screen
« on: December 10, 2007, 03:29:32 PM »
Just thought I would share this turn screen that I am using.   It is simply a modified version of the original with a new page.  I made the new page show up first when opening the mach because it is generally the only one I use.
The new page is an auto & manual screen.
It has most everything you need to do manual control and auto all on one screen.  My pet peeve was having to swap from screen to screen to do many things in turn, this cures that problem.

Arnie

123
I would recommend you go read the mach book on printer ports,  also do a google search on parallel port IO. 

Basically you don't change the port itself, in mach3 configuration you change the logic determination on what input state  is considered high or low, +5 input hi or +5 input low.   

What is normally done is 5v is supplied to the port inputs from a breakout board, this would be with the limit switch open,  then with the limit switch closed, it pulls (shorts) the input to signal ground.  You need to have current limiting resistors in your circuit so that you are not directly shorting the 5v to ground. 

Hope this helps you in the right direction.

Arnie

124
Video P*r*o*b*i*n*g / Re: First Mesh
« on: December 09, 2007, 02:05:05 PM »
That is too cool!!!  I ahve been playing with it a little but haven't done anything that good yet.

125
I have been using the find "find center of hole"  on the pull down menu from Mach.  Also the wizard that Art made, the bed of nails approach.  I didn't realize I could change the speed but I would guess is is running at about 8"/min.  I will check later today.  The LED just lights from the parallel port breakout board, that uses 5volts for sensing voltage on the contacts.   

I am not sure about the different direction response.  One of the tests I do after centering the probe using a dial indicator on the ball point, I rotate the probe in the spindle and fine tune the centering adjusting screws.  I get it down to .001 runout or less.  Then I do the "find center of hole" routine a couple of times, it comes back repeating from .0006 to .0000 each time,  then I rotate the spindle 180 deg and run it again.  This time it comes back at .003 on the x and .002 on the y.  A small amount .001 or so would be the centering adjustment.  The remainder would be the difference in actuation direction. 

I think that it is pretty good, it can't compete with the precision of a Renishaw, but not everyone has that kind of money to spend.

126
Show"N"Tell ( What you have made with your CNC machine.) / Re: Cameo
« on: December 05, 2007, 11:05:20 AM »
Nice work,  that gives all of us some new ideas to try.

Arnie

127
Bob,

This might be a double reply to your question.  I must have sent it to you on a pm already. 

It probes both types of objects,  the probe doesn't rely on electrical contact with the object, just mechanical contact.   It sends a open contact signal to Mach3 to trigger the probe input and lights up the LED.

It actuates in the x y & z directions.  Repeatability has been excellent,  the centering of the stylus works well but it takes a steady hand to calibrate,  I have been using an indicator on it mounted in the spindle, then rotate the spindle by hand and adjust the screws until the runout on the ball tip is 0.0005.  My indicator doesn't read much better than that.

Arnie

128
Well I got some changes made to the probe design.  The attached pictures show some of the internals and the finished product with relative size.

Note the LED, it lights up when the probe touches an object.

I have now put an ad on bargain basment for these for those interested.  It is all machined using mach3 mill and lathe.

Arnie

129
Newfangled Solutions Mach3 Wizards / Re: Writing Wizards
« on: November 27, 2007, 11:22:55 AM »
The screen editors are separate programs.  To get the screen editor go to the downloads area of the machsupport page, not to be confused with the downloads section of the forums,
and you will find the screen4 and some others. 
You run these separately. 
From their file menu you will want to open a wizard screen set, they are located under the \mach3\turnaddons . 
Once they are opened you can go to the different pages and edit the buttons and controls. 

There is a way do look at the code from right in Mach3 but I have never used it so I couldn't comment on it.


130
Newfangled Solutions Mach3 Wizards / Re: Writing Wizards
« on: November 26, 2007, 03:51:30 PM »
If you send me some more details, maybe even post the gcode you wrote here and I may be able to do up a wizard in a couple of weeks.

I have been playing with the G3, 
z-.2
x1
g3 x.4 z-.2 i.7 k-.5

makes a nice rounded donut shape
 
a wizard that selects different styles would be nice, then entering the barrel id & od, clearance, feed speeds, rough & finish cuts.

Arnie

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