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Author Topic: Problems threading on the lathe  (Read 330122 times)

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Offline RICH

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Re: Problems threading on the lathe
« Reply #690 on: November 15, 2009, 09:00:43 PM »
ART,
Just a few things on version 032, some may have been posted:
1. Spindle rpm DRO dosn't return to zero....it will if you command M5
2.At low rpm here,ie 55 rpm, the DRO reads properly, but the Turn Diagnostics shows values from -1400 to +700
    for the Real Time rpm, the application rpm is ok though. No other problem for the other rpm ranges i have.
3.A G32 command will run even though the spindle is turned off / no index. ( it shouldn't run?, in diagnostics it
   shows  the  triggering  even though there is no index ) . Turn Diagnostics not enabled. It runs to the first G32
    line / shouldn't execute that line. No error reported.
    Note that this is not the case if you run a file out of the wizard, as it will give you an error.
No big deal to me but a newbie may do a bad.
   Here is the file to try.  
N10 (Z AXIS TEST NO 1 )
N20 M3 G18 G20 G40 G49 G61 G80 G90 G94
N30 M98 P01 L10
N40 M30
O01
G32 Z-1 F0.1
G95
G4 P4
G00 Z 0.001
G94
G32 Z-1.0 F.1
G95
G00 Z0.0
N130 M99

RICH

Offline RICH

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Re: Problems threading on the lathe
« Reply #691 on: November 15, 2009, 09:19:46 PM »
Is  it  possible to have  a setting / check box / option added to Mach3 Turn, such that you would not need to go into the M1076 macro via VB Script editor to change the true / false for code output ?

RICH

Offline ART

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Re: Problems threading on the lathe
« Reply #692 on: November 15, 2009, 09:40:16 PM »
Rich:

 Problems noted.

  Ill discuss with Brian an easier way to turn on the G76 diags .. must be an easier way than what we use. :)

Johns machien reports a bit of RPM sensitivity, threads OK, but slightly different at different RPM's.. He suspects its the machine,
Im tempted to agree, but over time more info will come in.

Thx
ARt

Offline RICH

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Re: Problems threading on the lathe
« Reply #693 on: November 16, 2009, 08:36:42 PM »
Hi All,
Rev 0 - Threading On the Lathe was posted in Members Docs.
Good until the next version of Mach,  ;)
RICH
Re: Problems threading on the lathe
« Reply #694 on: November 24, 2009, 08:57:44 PM »
Has anyone with lathe spindle control successfully updated to the latest lockdown? I have a Wabeco lathe that has never had a problem and I've been using the .029 release with no issues. The recommendation for improved threading seems to be to update to .032 the latest lockdown and so I did. After the update my spindle dro indicates -602 rpm when commanded to 1000 rpm and a tach measurement shows the 1000 rpm to be the actual speed. The index pulse is functioning. I'm using speed averaging and index feedback control. Threading doesn't work anymore. Going back to .029 solves the problem. I went back and forth three times and the spindle issues follow .032. At leat three others have reported similar issues and eventually went back to much older versions.
I was following the threading improvement progress in this thread which seemed to finally solve the lathe threading issues and so .030 was released as the new lockdown after the improvement were included into the .029 release. Unfortunately the guys working on the threading issues used manual spindle control and a few reports from others resulted in two more quick releases to .032 which is where we are now. I waited a week to see if any other reports came in before upgrading, and when I did I ran into spindle problems. It could be just my particular setup but I'm curious as to whether anyone else has gotten it to work with auto spindle control. - Terry
Re: Problems threading on the lathe
« Reply #695 on: November 25, 2009, 06:16:10 AM »
I don't think it is a problem of auto versus manual spindle control, as I am seeing the problem under both, although it does appear that others who are not having any problems are running the spindle under manual control.

The index signal is getting through as can be seen by a reasonably stable and true speed indication  in the rotation speed realtime box in turn diagnostics. The problem appears to be in the conditioning of this signal as displayed in the application end RPM which is negative and is the same as the spindle speed indication given in the true speed DRO. Further details in my other posting " Indexing problem with R.042.032"

The same problem existed in versions .30 and .31. 

Peter

Offline Hood

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Re: Problems threading on the lathe
« Reply #696 on: November 25, 2009, 06:23:51 AM »
Can you attach the xml that you have when running the latest version, probably wont see anything wrong, but you never know.

Hood
Re: Problems threading on the lathe
« Reply #697 on: November 25, 2009, 06:43:29 AM »
Hi Hood

XML attatched,
Peter

Offline Hood

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Re: Problems threading on the lathe
« Reply #698 on: November 25, 2009, 07:02:48 AM »
Ok try this, when using the 032 version go to Ports and Pins and disable the Spindle relays and click apply. Then enable and apply again and see if that cures your problem.

Hood
Re: Problems threading on the lathe
« Reply #699 on: November 25, 2009, 08:38:20 AM »
Hi Hood

Thanks for your help. No, the problem remains after carrying out the test with the spindle relays.

Peter