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Messages - chad

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General Mach Discussion / Re: Tapping on a mill--- HELP !?!
« on: October 20, 2006, 03:59:39 AM »
Hmmm nope, same thing.

Thanks for the offer on the g code, i really would like to get some basics down.



General Mach Discussion / Re: Tapping on a mill--- HELP !?!
« on: October 20, 2006, 03:44:52 AM »
HI Graham I just tried it at home on mach without a machine hooked up just to watch what happened on the dro's. It went through one iteration of the z but the x and y didn't move? I just copy and pasted what you wrote?

I just looked at the m codes list and it says that P is dwell time in a sub..  I must be missing something.

BTW I am not a g code guy at all. I understand some stuff but a lot is just gobblety-gook.  Do you know of any good g code for noobies info?


General Mach Discussion / Re: Tapping on a mill--- HELP !?!
« on: October 20, 2006, 03:21:42 AM »
AAAH I forgot about that, i remember reading this back when...

Thanks !!

I will give it a try tomorrow.


General Mach Discussion / Fog Buster - mist / flood coolent review
« on: October 20, 2006, 02:49:02 AM »
Just a little fyi for those looking at coolant options.

I received my fog buster today and after a day of playing with it I have to say that it is awesome. It is like a mister that doesn't atomize the coolant. You still get an air stream and coolant but you don't get the haze around the machine. It is adjustable from just air to a downpour of coolant and works very well.

I am not affiliated in any way just a happy consumer. linky:



General Mach Discussion / Re: Debounce quetion
« on: October 20, 2006, 02:34:09 AM »
No problem.


General Mach Discussion / Re: Semi ridgid Tapping Wizzard
« on: October 20, 2006, 02:29:00 AM »
Brian? Did you ever get this going?


General Mach Discussion / Tapping on a mill--- HELP !?!
« on: October 20, 2006, 02:26:28 AM »
Hi All,

I am making just for fun a optics breadboard. It is just a slab of 6061 with 8/32 tapped holes every 1/2 inch. For the first little one i am building it is 15 x15 grid of holes that works out to 225 holes to tap. My wrist hurts just thinking about it. I could do the old tap in the cordless drill trick but i was hoping to get them all straight and would like to figure out a way to do it on the mill.

I have a grex so rigid tapping is out of the question. I do have a cheapish auto reversing head that I can use in the mill but the problem is it reverses out at 1.75 times the down speed. The other problem it takes about 1 inch to engage the reverse gear.

So I would need a way to set up the grid, feed in at the pitch/rpm to the correct depth, rapid up about an inch then feed out at 1.75 times the pitch/rpm.  yuck.

Any one have any ideas??


This would be a great addition to the drilling operations wizards ;) Brian? lol

General Mach Discussion / Re: Debounce quetion
« on: October 20, 2006, 02:07:36 AM »
Debouncing; What is it and what is used for? Well, if you ever looked at the current through (or the voltage across) a mechanical switch or a relay as it was changing states you would notice that the transition is not always a nice, clean step function. Often there are several changes before the switch makes its transition. In this case, the switch is said to be "bouncing". However, the same behavior can be observed in dirty switches or switches that are switching a heavy load.
Debouncing routines sample the switch's state at a fairly high rate. When a change in the state is detected, the routine will count anywhere from 1 to whatever the debounce number is set to. Mach samples to make sure the transition was not a glitch and that the switch has settled to its new state. The higher the number the longer it waits to verify that the switch has indeed been triggered and is not just noise from servo,spindle, etc.

As hood pointed out "debounce interval" I believe applies to every input except the spindle sensor (index debounce). The spindle sensor is used for rigid tapping, motor speed control, and turning and css on a lathe.


General Mach Discussion / Re: Digital scales as input?
« on: October 18, 2006, 12:38:56 PM »
Are you doing this in an attempt to get mach to close the pid loop for positioning? If so then sorry will not work, mach spends most of it's time worrying about a steady pulse train out to the motors. It doesn't have enough time to do high speed pid loops.
The other problem with using encoders on the axis and not the motor/servo is if there is ANY backlash in the mechanical then a pid driver will cause the motor to constantly hunt and eventually burn it out.

  If you just want to use these as a dro for manual machining then a plug in probably could be written just to display position but it probably would be easier just to write your own little dro app. 


Galil / Re: Mach3 + Galil
« on: October 15, 2006, 02:32:55 PM »
So do those cards have step and Dir out or they only analog ? 


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