Messages

5281

Share Your GCode / Re: Spindle speed increaser for engraving...

« on: December 16, 2009, 05:22:19 PM »

Bill,
It's an air driven small die grinder and yes it makes plenty of noise. But i have never broken any of the small end mills
with it. The small ones like 0.020" are not cheap!
RICH

5282

General Mach Discussion / Re: Help with Spindle Index please

« on: December 16, 2009, 05:15:06 PM »

YES, just click the spindle button ....even if you are turning the motor on manualy or you will not get an  rpm readng. I actualy have M3 as part of my Iniatlization String in config...... NOTE THAT I AM "MANUALY" TURNING MY MOTOR ON. You may want to provide an iniatialization via a macro like it shows in the write-up in Appendix "C". This way you can always just type M1111 in the MDI and it will reset your lathe back to YOUR prefered state.
You may forget for instance, after threading. to provide a G94.

Index Debounce here is 10 and works, like Hood said, play with number some by lowering it.

RICH

5283

General Mach Discussion / Re: Use Spindle Feedback in Syn Modes ? Experiences

« on: December 16, 2009, 11:54:57 AM »

 "I must verify the results for myself. Somebody elses testing procedure could have been different or flawed."
Convince yourself and if you come up with an easier or  better one than is in the write-up let me know.

"Btw I start the thread .1 away from the piece."
3 to 5 pitch diameters away is a general rule of thumb, but, it depends on your system.

"in the turn mode my accel is different"
The accel will vary and is dependant on how far you are away from the start point to the thread and how fast the spindle is turning. Make note of the accel required for a particular threading operation in the wzard.

"Seems to stay within 3-4 rpms while cutting and 1-2 if no load"
Waite until you try doing larger threads, or threading material other than Al.
That's were experimenting helps. Also consider doing flank cutting.


 "Btw did I tell you how much abuse a little Sherline can take waiting for an idiot to hit the Estop? What an excellent learning tool. "
I sure had fun with mine and at least it will stop if there is a problem. You get a bigger lathe / horsepower it will do damage. 
RICH

5284

General Mach Discussion / Re: Use Spindle Feedback in Syn Modes ? Experiences

« on: December 16, 2009, 11:32:50 AM »

Hood,
I may be confused with something else.....that's why i need to go back and look through the testing information.
It's one of those "the light bulb comes on but it's kind of dim". 
RICH

5285

Share Your GCode / Re: Spindle speed increaser for engraving...

« on: December 16, 2009, 10:57:59 AM »

Interesting gadget. I do engraving at 18,000 to 60,000 rpm.  9000 seems slow but is surely better than 2600.
RICH

5286

General Mach Discussion / Re: Turn Threading working at last

« on: December 16, 2009, 10:50:56 AM »

You can use the threading wizard in Mach3 Turn with optional postings of code. Additionaly note that there are threading settings you can take advantage of for the cut & infeed type. See page 44 in the Threading On the Lathe write up which can be found in SUPPORT>DOCUMENTATION above or in the Members Docs.
Glad it is working fine for you all.
RICH

5287

General Mach Discussion / Re: Use Spindle Feedback in Syn Modes ? Experiences

« on: December 16, 2009, 10:36:15 AM »

"So for correct threading I can see where spindle feedback would be a necessity however is speed averaging also to be checked?"

YES ( checking it should do no harm and i need to go back and find some specific info on it . There is only 450 pages of stuff on threading, so don't hold you breath while i look ).

"What is up with the first pass?"Do you mean what happens during the first pass? That is explained in section 2.1 of the write-up.
RICH

5288

Works in progress / Re: Lathe screen re worked

« on: December 16, 2009, 09:55:32 AM »

Great work Phil,
I have attached some pics with comments. In the future it would be nice to have a screen with an enlarged grahics area. I am struggling some with the value of the Manual screen. I am only quessing that the logic was you set the job up in the manual screen and then go to the cycle screen to run the piece. Fine if you did multiple pieces but practicaly for the usual one of a kind turning i find it to just be a real PITA. I have never found any information on "Zero World" definition ( it will cancel all offsets and resets home to 0,0 ) maybe it was just a wording thing and reference all home would be more appropriate.

So for the a new enlarged screen maybe it can be the Manual Screen. Actauly i think a more logical / visual set up screen would also be a nice addition, but, want to think about that one some more.

Is there any reason you would not want an MDI line on the Cycle Screen?
Is the scale x & Z worth while?


So take a look at the comments and see if they make sense to you
RICH

5289

General Mach Discussion / Re: HUMS, LOCKS UP, NOISY SERVOs and ERRATIC OPERATION - RF NOISE

« on: December 16, 2009, 05:51:00 AM »

"DON'T YOU GUYS HAVE SOMETHING BETTER TO DO? - GO MAKE SOMETHING, GET A LIFE "   

I take it you didn't like the replies to your posting?
RICH

5290

General Mach Discussion / Re: Use Spindle Feedback in Syn Modes ? Experiences

« on: December 16, 2009, 05:37:32 AM »

Like Hood, I am also suprised. You should use always have spindle feedback checked. That provides for monitoring of the rpm while doing actual threading. Spindle speed averaging took the  rpms and adjusts the next pass based on an average of the monitored rpms. If there was not much change in the rpm then you may get away with it. Don't fool yourself, as the spindle rpm changes even when not under load, and you don't have the equipment to  measure it.
Not having those checked you will find that you have lead error or run into problems. If you do find you have lead tolerance issues it's your lathe system and not MACH. Testing shows the software can meet the criteria shown in figure 4.4.5 in threading on the lathe write up. The accuracy of the software exceeded my measuring capabilty.
RICH