Messages

3041

General Mach Discussion / Re: New Chat room added..........

« on: December 11, 2011, 07:54:31 AM »

Fred may have looked in the mirror. 

RICH

3042

General Mach Discussion / Re: bench testing the parallel port and pins -questions and issues

« on: December 11, 2011, 07:51:22 AM »

Pins 18 to 25 are grd and i have been told to jumper / tie all the grd pins together . So a wire is run accross and ties each pin together at the connection on my controller / not at the pc. This is done since the pc internal resistance of each pin can be different and to avoid noise. That info came from a electronics engineer.

Like hood i have grounded pp output pins to the grd pins 18 to 25 with no problems when testing.

My electronics background is limited so lets see what the electronics guys out there have to say.

RICH



 

3043

General Mach Discussion / Re: New Chat room added..........

« on: December 11, 2011, 06:59:54 AM »

NOW WHAT do you guys consider OLD

When one looks into the mirror and can only hum the phrase from  Ray Orbitson's  song ....

"WHEN THE SIGNS OF TIME SHOW EVERY LNE"
and ya skip the remainder "I love you Pretty One, Pretty One, Pretty One"

RICH

3044

LazyCam (Beta) / Re: Z negative will not post

« on: December 10, 2011, 06:00:43 PM »

What does the graphic window display in LC show?
It will reflect your settings.  Post a pic of the Layers tab flyout which shows the settings.

RICH

3045

Newfangled Solutions Mach3 Wizards / Re: Threading Multiple Start

« on: December 10, 2011, 07:12:08 AM »

What obvious fubar am I am missing?

I am thinking that the gotcha will be timing even if you rotated the part 180 degrees.
I will admit that i never did any thread milling.

For the lathe, the G32 threading cycle index triggers the movement of the Z and feed rate is sampled and adjusted so that
the entry point would be exactly the same based on rpm of the rotating stock.......in the case of a 2 starts, Z is adjusted to offset the thread start by 180 degrees,but you still have the monitoring of movement from the new start point. For the mill you have no way of having the mills z travel monitored to make sure  the 2nd thread pass enters the piece 180 degrees from the first pass.
Any small difference in total Z travel timing (distance relative to acceleration and feedrate  and also start point) will affect the entry point of the cutter and it doesn't take much to throw it off by some amount of degrees. So the distance between pitches will not be correct. I am guessing that one could do some testing and see the how it goes but the outcome will be hit or miss.
FWIW
RICH

 

  

3046

Newfangled Solutions Mach3 Wizards / Re: Threading Multiple Start

« on: December 09, 2011, 06:24:47 PM »

I am threading a 3.5" minor diameter hole to 3.7" major thread diameter.

You could always use alternate flank cutting and a few fine spring passes on the lathe.
Would be fine for a single thread but never attempted the combo for a multiple thread.

That's a deep thread and also fast z axis move on a lathe.

Wish ya luck,
RICH
 

3047

Newfangled Solutions Mach3 Wizards / Re: Threading Multiple Start

« on: December 09, 2011, 06:16:37 PM »

That I can't help you with.
RICH

3048

Newfangled Solutions Mach3 Wizards / Re: Threading Multiple Start

« on: December 09, 2011, 06:15:19 PM »

I do not want to rotate the part.

No need to....... instead the start point of the thread cycle is changed in the code.
It would have been better if you tried multiple threading in advance of actually doing it the first time.

If you removed the stock or have already done one thread you can always pick up the thread and adjust for the second.
Be meticulous.

RICH

3049

Newfangled Solutions Mach3 Wizards / Re: Threading Multiple Start

« on: December 09, 2011, 06:04:47 PM »

Go to Members Doc's and you will find a write up called Threading on the Lathe ( See page 13 / section 3.6.3 )
Also see section 8.0 starting at page 48.

RICH

3050

General Mach Discussion / Re: New Chat room added..........

« on: December 09, 2011, 05:00:00 PM »

What the heck does that make me then

Moses 

RICH