Hi Everyone,

Has anyone successfully threaded with version Mach3 R3.042.036?  I have not gotten it to thread correctly.  I have version R3.042.020 threading well but the current feed rate DRO is not even close to reading the right values.

Thanks,
Andrew

So, my lathe ist still in construction...   

But on the other hand, I am quite interested what's going on with lathe. So I will be able to get it to run quickly when mechanical thing are completed...


Just one question:
Are you using Index or Timing input for sensing the spindle?

As I understood from the documents, Timing is no longer supported starting from version R3.042.030.


Regards
Konrad

"As I understood from the documents, Timing is no longer supported starting from version R3.042.030."

What I wanted to say:

As I understood from the documents, "Timing" is no longer supported starting from version R3.042.030, while you have to use "Index" input

Thanks for the reply,

No, I am not using the timing input and I haven't ever used it.  I have been playing around with a few different versions and can't seem to find one that will run this program and display the feedrate correctly every time.

G20
G95
G97 S1400
M3
G0 X0 Z0
G1 Z5 F0.1
G1 X5
G1 X0 Z0
M5
M30

The first time I start up mach3 and run this program it looks like it is working right. The feed dro reads 0.09 to .1, but the second time I run it the motion is very slow and the feed dro reads around 0.045.

I have version R3.042.020 threading fine but I can't seam to get passed this feed problem.  I just tested version R3.042.030 and still have the feed problem... I haven't tried threading on this version yet.  I did find that installing mach3 over top of another version sometimes messed a lot of things up so this is how I have been installing every version I try:

Backup XML, licence, screen set and macros.
Goto Device Manager and uninstall the Mach3 Pulsing Engine.
Goto Ad and Remove programs and uninstall mach3.
Delete the Mach3 Folder.

Reinstalling....

Install the new version.
Copy backed up files into the mach3 directory.
Restart Computer.

If anyone has seen this problem please let me know!

Thanks,
Andrew

Note: I know my spindle feedback is working right because I can thread fine with version R3.042.020...

Do you have any delay set in your spindle setup page?

Hood

Hood,

I think I have my spin up time set to the default 1 second... But I tried slowing the feed down to F0.003 and move 5 inches and it ran at 0.0007 so it would have had plenty of time to spin up to the full speed. It took about 5 min to make the pass and the feed was wrong the whole way!

Andrew

I noticed something similar the last day, I use a SmoothStepper and an older version of Mach but I had retuned the servo spindle and the feed seemed to crawl at times. I had zero in for spin up time but when I put that to 2 seconds there wasnt a problem.
What I think was happening was the spindle was being read before it had got to speed and the feedrate set accordingly, but with the delay it had got to speed and was feeding correctly.
As a test it might be worth a try increasing the delay or even putting a G4 in your code after the spindle start.
Hood

Hood,

I will test that... But I would think that if I told it to move a few inches at a slow speed after a few seconds I know the spindle would be up to full speed so shouldn't mach3 have sped up the motion to match the spindle speed?

Yes it should, not even sure if my problem was Mach or SS related and not had a chance to investigate further as I needed to get some lathe work done and have been too busy with a load of welding to test more.
Hood

Hmm.....
All the threading i have done was with version .030 to .033 and haven't even updated to .036 yet.
But i manualy set the rpm. When you thread, the feedrate will be changed based on the actual rpm Mach is reading.
The reading is based on the index pulse.
-Disable any Turn Diagnostics plug in
-check Use spindle feedback in syn mode

Rather than seeing what Mach is displaying for a feedate maybe you may want to thread a "scribed  line" and see what happens.
 I see two different issues, namely a threaded feedrate and an unthreaded feedrate.
There is a difference in G94  to G95. So not sure for a controlled spindle if one, both, or whatever is possibly screwed up.
FWIW,
RICH

BTW,
Release 3.042.033
-- Fix for - scale and IJK arc commands
-- Spindle speed register expanded for computers over 3GHz (they where reading - speed)
-- Rotational feed correction fixed for moves with Z axis !=0
-- Rotational Dia feed changed to Radius rather then Dia