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Messages - TomWh

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1
General Mach Discussion / Re: Drill chuck reference on lathe table!!!
« on: March 11, 2020, 10:02:01 AM »
Hey Rich

Did a far amount of searching on probing but mostly found getting touch off points and reverse engineering part tracing.  Not sure how you would reference a drill chuck to x center point after you start the machine.  If there is somewhere to look to find more information or you could give me the procedure you would use to center this chuck after a start up, I would appreciate it.  Also are you using a touch plate device or a probe with internal switching? 

I am not rapping my head around with out a reference point how you can hit a button and have the machine take the tool post to a certain position. 

Thanks
Tom






















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General Mach Discussion / Drill chuck reference on lathe table!!!
« on: March 10, 2020, 12:24:49 PM »
It seems with out switches on mach 3 turn you can not restart your machine and have a reference home.  I do not have a tail stock on my lathe.  So when I want to drill something I need to have something to bring back the tool post to proper x axis to be centered.

In researching switches it seems that they can be less than accurate unless you spend alot. 
This a hobby for me.  The closet thing I have been able to come up with is getting the drill post centered and making that machine cordinate x0 z0.   When I restart the machine the machine cordinates are the same as when you turned the machine off.  If I get the machine coordinates back to zero it seems to be at center.  This method requires you never change the machine coordinates.

Any ideas on best way to be able to call back the drill center?  Would home mechanical switches be OK ? 

Thanks in advance
Tom

4
I was using a external mechanical switch.  Could set up a solenoid/relay switch and trigger it through Mach 3 and breakout board.  There doesn't seem to be an issue with starting the motor when the screen is already showing a number.  Do you see any potential problems or would you just click off then on , on the spindle screen?

Thanks
Tom

5
Just got Mach 3 and have been setting it up. On the lathe I got the adjustments to where the spindle rpm seems to be correct with the readout. 
The weird thing is when you turn the spindle off the rpm readout goes back to 60 to 150 never to zero.  Was watching a video and his lathe and mach 3 where doing the same thing as mine  Is this a problem or is there a fix?  Been all over the net but could not find anything.

Thanks Tom

6
If any one is following this thread I could use some help.  New to the cnc game and just got mach 3.  Will be doing some simple threading and ran accross this thread.  I down loaded the zip file and pasted into mach 3 on the hard drive.  I can not seem to get it to come up in mach 3 turn.  Also can not get g76 to come up anywhere.  Thought I would try this and the wizard that is on the mach 3 turn. 

Thanks Tom

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