Machsupport Forum
Mach Discussion => General Mach Discussion => Topic started by: rwskinner on February 11, 2010, 12:32:02 PM
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Hello to all. I'm a new Mach3Turn user and I finally got all my settings and calibrations done. My motor tuning turned out fine and extended testing show no lost steps and my travel is correct. I run a 4.500" OD Disc on my spindle, with a single notch of 0.250" wide. My spindle speed in Mach3 is dead on as verified with a photo tach and is steady.
I'm sure I'm overlooking a setting somewhere, but my problem is that my threads that are cut (Using simple threading wizard) come out really bad, as in no threads. The first past is correct, the seconds pass seems like it's 180 out because the threads are between the first set of threads. The third pass pretty much takes all the threads off. The fourth pass looks like it's correct and so on. I end up with the final finish looking like a metal file !!!
Can anyone give me ideas where to look in order to correct this please?
Richard
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Hi Richard,
What version of Mach3 are you using ?
I would also go in the members document section as Rich has done a mega document about it "Threading On The Lathe"
Phil
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First, are you running a licensed copy of Mach ?
Russ
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..oh, and as Phil says, 033 reports to work well, 036 not so good.
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Richard,
See section 7.1 in the manual / configuration, sounds like you are not triggering, should have... Use Spindle Feedback in Sync Mode ...checked.... as shown in figure 7.1.2.
See section 3.5 about triggering test.
RICH
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To answer some of the questions: Yes, it's Licensed. The Demo wouldn't thread at all.
I'm using the current, stable release: 3.042.034
Thanks.
Richard
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This is from another thread in this forum:
> Just to let everyone know version 3.042.029, 3.042.034, 3.042.035, 3.042.036 do not thread right at all!
Maybe, you should just try v3.042.033....?
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I installed 3.042.033
Now, that made all the difference in the world. Nice looking threads !!!
You know, I even search the forums here for Threading Problems and it never pulled that forum thread up.
So I guess the last stable version isn't 034 like it said :(
Thanks for all the help !!!!
Richard
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The updated versions have fixes for whatever, but i know 033 works for threading.
That's why i haven't updated here and the manual stops at 033. It took 1 1/2 years to get threading fixed.
Let's just blame it all on BRIAN.........i remember telling him not to break threading.....guess he forgot. ;)
RICH
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yup...33 still works for me. ;D
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Hi All,
Just got a sensor fitted to the spindle on my colchester - followed the "Rich guide to threading"
Working spot on - after I set the feed override to 100% !! (for a moment I could not understand why the pitch was way off :D)
All hail Rich ;D
Derek
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I Have 032 and was trying a thread a coupe days ago. The thread worked but it didn't look great. Do you guys know if this version has threading issues? If so, where can I get 033?
Thanks.
Eric
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You can find old versions here:
ftp://ftp.machsupport.com/Mach/
RICH
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Hi, haven't been on here in awhile. I am STILL using version 1.84 on my lathe, and have had great success with threading and found no reason to upgrade, especially after the massive threading problems that the newer versions seemed to suffer. But, I usually make both parts of a thread, the male and female pieces, and have no issues. However I recently had to do some very long threads that were to screw into a deep threaded hole, and found that the pitch is off by maybe a half pitch over 1.25" of length, and nothing I could do would fix it. So, wondering if the newer versions of Mach have that issue fixed, and are as stable as my old reliable standby 1.84?
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DAlgie,
I don't go back to V1.84 so can't relate to that.
A lot of effort was done to correct the pitch, feedrate, etc in threading.
There is a chart in the write up which gives allowable error as compared to pitch and that was the basis for how accurate the threading should turn out.
Most of the testing i did was with 2" lengths ( becuase i could more easily measure that length with the microscope) but i did tests
out to 4 or 6" and had no problems with the results.
I am still using 3.042.033 ( don't use anything lower than that version ). I don't remember any problems reported since then .
Let us know how you make out.
RICH
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Just reading through the post i see here that you guy's are using v3.042.033 for the lathe and threading i have been trying to get this to work since i purchased Mach 3 are these older version's available where do i find them thanks
Dennis
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Just reading through the post i see here that you guy's are using v3.042.033 for the lathe and threading i have been trying to get this to work since i purchased Mach 3 are these older version's available where do i find them thanks
Dennis
ftp://anonymous@machsupport.com/Mach/
Hood
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Link didn't work Hood and i tried a diffferent one and it didn't work.
So.......Under the Artsoft logo above:
Support>Tutorial Videos>FTP
( "FTP" IS ON THE SECOND LINE, CLICK ON IT)
Click on the "Directory MACH" and you will find older versions listed there that can be downloaded.
Takes a little longer but you get there! ;)
RICH
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Ah, forgot the forum automatically puts a http:// before any posted link which is no use for a ftp :(
Hood
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Hood / Rich
Thanks i did manage to get to the list of older version's also found a lot of other help full stuff i didn't know of.
Dennis
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Thanks Hood, Rich, will give that a try. Save XML to another folder first and then put that back in the right place after installing that version Mach again?
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Hello. I have a question about disk to recognize velocity and position of spindle. At older versions of mach I could use disk with some slots and one wider. Now i had to change PC in my turning machine and install the newest mach,but It works with one slot only! I dot like it. From time to time I have to cut thread on quit big pipes (~10"), then speed of spindle is rather low (~50 RPM). In spite of high power of spindle motor - 10HP, the rpm is not so rigid and plays according size of chips. At low spindle speed, it makes problems, thread is imprecision. So do you have any ideas to solve this problem?
Regards Marek.
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Can you attach your xml please.
Hood
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Yes, of course, see my XML attached.
I still can not understand why is changed measuring spindle's velocity. Does any body could explain me?
Regards Marek.
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You have your Index Debounce set to 50, try setting at 0
Hood
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We are rookies to Mach 3 Turn and would like to learn how to use the threading wizard, is there a tips and tricks section on the setups? Highland Community College Technical Center
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http://www.machsupport.com/forum/index.php/topic,13017.0.html
RIch did a write-up here, might help ya.
Look through the other Members Docs at the bottom of the HOME page.
Russ
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Thanks we will check it out.
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MARGOR,
I dot like it.
Dosen't matter if you like it or not, it is the way it is. There is no advantage to multiple slots as compared to a single slot.
In spite of high power of spindle motor - 10HP, the rpm is not so rigid and plays according size of chips. At low spindle speed, it makes problems, thread is imprecision. So do you have any ideas to solve this problem?
Adjust the type of thread cut or the depth such that rpm is stable or at least dosen't vary significantly.
RICH
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We are rookies to Mach 3 Turn and would like to learn how to use the threading wizard, is there a tips and tricks section on the setups? Highland Community College Technical Center
I think everything you need to know is in the write up. There is nothing special about the using the wizard. You basicaly turn down your piece to a correct diameter, deifine the pitch and how far you want to thread,
the Z start should be about 3 to 5 x pitch to allow for aceleration, x end is depth of the thread ( and for a SHARP V THREAD DEPTH=.866P ).
RICH