Machsupport Forum
Mach Discussion => General Mach Discussion => Topic started by: Vortex on March 20, 2013, 03:48:11 PM
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Hello
today I wanted to thread on my Lathe...
The Thread works but with an issue I can´t explain my self.
here is the program for the Thread´s
N690 T0404
( Thread )
N710 S600
N720 G0 X11 Z1
N730 G76 X9.25 Z-4.5 P0.75 H0.25 C1 I30
N740 G1 X13 F200
N750 G1 Z-4.5
N760 G76 X11.25 Z-9.5 P0.75 H0.25 C1 I30
N770 G0 X28
N780 G0 Z20
N790 M30
The Problem is that the tool cut the first pass and till here all is fine ...but at the end of the lenghs of the thread when the tool picks up to run to the beginning for starting the next pass the tool picks up very very slowly...reached the measure the tool continues with the next pass... reached the lenghts the tool picks up very very slowly....
If I got four hours of time to produce the thread ...than I dont care ...but I got no time for this jokes.
Can someone help me to understand the issue ...HOOD where are you :D
Thanx
Vortex
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Can you attach your xml and I will have a look, also not quite sure what you are meaning by "tool picks up"
Hood
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Hi Hood...
Yes...Pick up is not the right word.
I mean , when the tool reaches the end of the lenghts and than get off the piece and run to the beginning to continue with the next pass.
Always at the end of the threat when the tool gets off , it get off very very slowly
I atteached you the XML ...hope you find wahts wrong.
Thank You men
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Ah ok, the pull out, yes that is a problem with the CSMIO or rather Mach and the way it communicates with the plugin. If an external device is using full encoder to sync the Z to spindle then Mach has a delay in updating the plugin with information,
The Galil also suffered with this problem when they used encoder to sync Z so they reverted to single index pulse method.
I found an older version of Mach made the pullout almost instantaneous, if I recall it was 022. The spindle override did not work in that version however and I did not test it for long to see if there were any other issues but it may be worth you giving it a try.
I have been assured that there will not be a problem in Mach4 but when that will be available I have no idea, could be 2 months, could be 2 years ;D
Hood
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BTW have a look and see what your chamfer (L) is set to, set it to 0 and see if it helps.
Hood
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Hello Hood
If you take a look in my Program in G76 there is no chamfer value set.
Do I have to set a Chamfer Value to 0 ???
So how I understand you, there is a general problem with the CSMIO and Mach3 when threading ?
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If the G76 does not specify any of the words then Mach will look at your setup on Config menu then Ports and Pins then Turn Options page, you may have the Chamfer set to something other than 0 there.
Here is a video of my wee lathe doing a simulated thread, you can see the delay in the pull out, I am using the spindle override to show how it tracks the thread nicely.
http://www.youtube.com/watch?v=sKp343Ubf7U
Here is one where I was using 022 version of Mach and you can see the pull out is much quicker.
http://www.youtube.com/watch?v=sKp343Ubf7U
Also if your spindle speed is fairly slow then I think the pull out tends to be slower for some reason, so if you can increase the spindle speed it may help, that will however depend on your Z axis rapid speed as to whether it is possible.
Hood
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I watched your videos....and your pull out is quicker in any case :D
On my machine the pull out tooks about a minute !!!!
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Ok just had a look at your xml and I see a few things but the main one is you are in demo mode. Threading does not work in the unlicensed version of Mach and I am surprised you are even getting it working as well as you are.
Hood
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Got no Demo version. I purchased the Full version complete with my machines .
Can you do something with the XML ???
I will contact the reseller and ask him what the ********* he sold me. I payed a lot of money for this things and want no Demo Version for my bugs.
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Can you show me where you can see that its a demo version ?
So I can show it to my reseller .
But maybe I forget to put the licenskey in.... I will take a look on this
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Did you get a licence from the seller? it will have been emailed to you or him from Artsoft. If you did then you need to place it in the Mach3 folder.
In Mach you will see whether you have the licence placed correctly as you will se your name or a serial number in the Help, About Mach....
Hood
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Oh its a file called Mach1Lic.dat
Hood
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I will take a look ...maybe I forget to put it in...
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Hood, can you do something with the XML ?
Maybe it works better after you made some changes.
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Suggest you make sure that your license is installed.
RICH
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I cant do anything to your xml to make it better if its not licensed, so if you have a licence, place it in the folder then attach your xml again and I will see if I can find the issue. I dont think however you will have the pull out being so slow once licensed.
Hood
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Yes Ok . I will see if the license is already in ...if not I will do it and than I retry ....Hope that´s only a issue of license
Thank You
And we will keep in touch
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Hello Hood
I found the issue.
After-hours the toolchange i put in G95 and now it
works.
I normaly work in G94 modus ...
I thought that the G76 Modus changed automaticaly in G95
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G76 will normally use feed per rev in a synchronised feed but as you do not have a licence then that is probably the reason it wasnt working correctly, in fact it still probably isnt working correctly as likely it is just doing a feed per rev rather than a properly synchronised move.
Hood
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Hello Hood,
ok the issue is the same with and without license. Today I put in the license but the issue didn´t dissapear.
I think, that the problem is G94 in the first line of the programm. So the problem will be that Mach didn´t recognize that it has to work in mm/rev when G76 is called.
There must be a bug with G76 or with G94 in the first line.
Now that I put in G95 after the toolchange the issue dissapeared and G76 works .
Got nothing to do with the license in this case I think.
Mach3 is a strange thing :D
But anyway. Thank you a lot to be on my disposal.
Regards
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Threading will be done with a G32 rather than G95 I would think, the canned cycle will just do that internally.
Hood