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Messages - RICH

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4911
Well parts may fly, tools may be broken, but i got hurt once and have never fogotten it.
I was using a simple drill press, 1/2hp motor on it, 1/4" drill at say 40 rpm to drill though some wear material.
To clear the chips i was using a wooden stick, but for whatever reason i started using the kevlar gloves to move the
chips aside. The drill caught the tip of the glove on my left hand, it just started pulling and wrapping the glove around my hand.
I was lifted off my feet and thrown against the drill press. I screamed as i watched the drill now start cutting the glove and
could feel my thumb being pulled on and wrapped around and over the adjoining finger. I could now feel the drill cutting my
ger. The thumb and finger were just wrapped around the drill and was watching it twist the glove and start cutting it.
As the buzzing in my head started and i knew i was going to faint, i kicked the wall and hit the cord knocking it out of the wall.
I fainted for about a minute and then came through.  F.....did it ever hurt!  I slid the hand down the drill and told the wife
that to i cut my finger off. I now felt no pain so i removed the glove. The drill cut through the skin to the bone.
My thumb was pulled  out of it's socket and rotated about 90 degrees or so. Because the thumb was over top of the
finger it pushed the nail through the skin. It hurt just as much when the doctor pulled the thumb to reset it back into the socket.
I took about 6 months for all to heal. I would say that the finger felt like someone hit the nail  full force with a 10 # sludge hammer.
SO don't thing for a moment that a small machine can't do harm or underestimate the power of a motor.

RICH

4912
General Mach Discussion / Re: X0Y0 Jumping?
« on: February 15, 2010, 11:55:30 PM »
All looks good until you get to the letter  O and then that throws things off.
Do you have any problems when you try to do the  O by its self? I am wondering if its a rapid move and you  are skipping.


RICH

4913
Happy reading, this should do ya, there are programs that you can use.
RICH

4914
General Mach Discussion / Re: Rotary axis zeroing problem
« on: February 15, 2010, 06:00:13 PM »
Uli,
Glad you posted. This is a good discussion. I sometimes only wish that there was a one place stop to grasp all the things associated with using the rotary axis. In fact i started a write up about it but got side tracked in the last few weeks. So anything posted  is of value for me no matter what it is.
 
RICH


4915
Just from keeping up  on threadng, seems ver 033 is still the one to use for threading and you want to use spindle index as that is reading true rpm of the spindle.
now from memory .......
- there was a problem with some pc bus speeds which could cause problems and that was fixed with a later version ....but it realy didn't fix it  when an update was posted....

- i recently glanced through a posting on variable speed drives on the Yahoo site and ART made a whole bunch of comments about them...what i remember is that the VFD speed control could be fighting the program threading control ( based on rpm ) and the feed rate gets screwy for lack of better words. It was posted in the last week

So i am thinking that you want to set the spindle speed, that you want for threading, let the rpm vary if that is the case with you motor, and let the threading cylce do it's job varying the feed rate when it sees in a fluctuating spindle speed. 

Sorry i sound wishy wash and could be all goofed up on this, as i don't have a VFD or spindle speed control on mine. Maybe someone can chime in to give you more experience on the motor control side as it relates to threading.

RICH

4916
General Mach Discussion / Re: Rotary axis zeroing problem
« on: February 15, 2010, 04:17:15 PM »
Quote
what use I can make of the fact that a move G0 A0 ends at a position of A3600

I see what you mean, once A is set to home ( Zero world A axis here ) / there are no offsets for  A, machine coordinates will / are  keeping track of ALL the rotations.
You can at any time change A to 0 for the  program coordinates and that will not change the machine coordinates, if you do a G28 A0 it will home the A axis back to 0 doing  as many rotations as you have totaly moved.  Now if you G0 A-3600 for example it will go back to A = 0.

Thinking we / you / I need to look at Program and Machine coordinates and  get a better understanding of how things are being kept track of and then relate the appropriate G0 A... move for what needs to be done with different settings.

That said, just don't assume how something is supposed to work, need to see how it all works in light of it all. Not saying that anybody is right or wrong, just that from a simplistic read of the definitons of those posted config settings.....well, can get confusing if you go beyond them.

Will also add, not knowing the logic of the program writer,guess will need to figure it out, accept it or make recommendation for change which is more logical if logical. Hmm....sounds like Spock from StarTrek.  ;D

RICH
 

4917
General Mach Discussion / Re: NEED HELP IN CNC MILLING AND SOFTWARE
« on: February 15, 2010, 10:20:21 AM »
Like Tweakie said,you would be bypassing to the dirves , but, watch out / look into it more as the drives may not be worth a hoot even if they are step and direction.
RICH

4918
General Mach Discussion / Re: parallel cable
« on: February 15, 2010, 10:16:01 AM »
Then I suggest you use the usb along with something like the Smoothstepper.
RICH

4919
General Mach Discussion / Re: Rotary axis zeroing problem
« on: February 15, 2010, 10:11:16 AM »
If it is a lathe, use Phil's screen as it has the button already there for it.
RICH

4920
General Mach Discussion / Re: Lathe Probe
« on: February 15, 2010, 10:07:41 AM »
Russ,
Sooner or later, as i don't have a turret, i will do something as tool changes become a PITA if you using LT
or any other Cam software. May try making a turret using the gears out of a ratchet wrench ( talk about cheap
) since it will need to be a small for what i do.  Any way, just cheap thoughts of the day.....
RICH

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