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Messages - Rimmel

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51
General Mach Discussion / Re: Mach3 m1076.m1s problem
« on: June 22, 2016, 07:30:23 AM »
Hum ...
You start at X9.95, which i assume is an undersize M10.
You have a pitch of 0.75
But you specify an end diameter of 9.00. That's effectively a thread depth of 0.95 mm, for a pitch of 0.75, or an overshoot of 0.2 mm. That's rather a lot. I might go for an overshoot of 0.075, or less.
All the same, it should still work.
I will add that i have done a LOT of theading under .062 with an ESS, and I don't think I have ever had anything like that happen.

That it is RANDOM in occurance ... - um. That is a worry!

I dunno. Have you tried staying with g94 and not changing feed rate modes? I have no idea why that should affect the X movement though (unless you are hitting deep Mach3 bugs).

Cheers
Roger



Thanks for the reply again Roger,

Yes the thread is a very strange one, made to fit an original part. The actual thread is irrelevant though as it does it with any parallel thread if repeated often enough. I have used BSPP, UNC with different pitches/sizes etc etc and all do the same.

I agree it's the random attribute that is foxing me as well. Hence wanting to simply remove any reference to tapered threading in the m1076.m1s

Not actually tried just staying with the G94 mode yet - I guess that is the next move.

thanks again for the replies.
Rimmel

EDIT************ Just found "<TaperRatio>2.</TaperRatio>" in the mach3turn.xml - is that supposed to be set it that value?

52
General Mach Discussion / Re: Mach3 m1076.m1s problem
« on: June 22, 2016, 06:59:59 AM »
@Rich - I tried all that and all good.  ???

@rcaffin - I thought you were on to something then because that seems to be exactly what is happening! But the diagnostics screen taper is set to "0.0000" However the program does not crash at all!

Let me outline exactly what is happening:

FirstOp.tap = a few general lathe operations, facing etc and towards the end cuts an 0.75 pitch thead using
Code: [Select]
G0 X9.95
G0 Z5
G76 X9.0 Z-21 Q2 P0.75 J0.04 L45 H0.04 I29 C1.0 B0.01 T0

PartOff.tap = parts off the part


1) Start FirstOp.tap

2) Run through program

3) Clean up threads with scotch bright

4) Run PartOff.tap

5) Goto 1

This works perfectly time and time again - however for no reason at all suddenly the G76 in the firstOp.tap program reverts to taper mode for about the first 5 operations and then SUDDENLY goes back to parallel thread mode. When it does this it jams the tool into the workpiece (moves to the proper parallel tool position for that iteration), waits for 2 seconds (ish) and then carries on normally (in parallel mode) as if nothing has happened and finishes the program properly. Without changing a single thing or restarting Mach3 (apart from the broken tool tip) I can carry on running the two programs perfectly again..... until randomly it does the same thing.

I have tried putting the two programs together, but it is the same. It also does it randomly also when doing a "regen" between programs or a regen between end of program and start.

So the program does not crash as such it just gets confused for a very short while, it is almost like it is reading values that are cached somewhere, then the cache gets updated and it resumes on the proper course.

One thing I am doing is swapping from G94 mode to G95 and back

thanks
Rimmel

EDIT******* I have checked the rpm when cutting the thread and it is VERY stable

53
General Mach Discussion / Re: Mach3 m1076.m1s problem
« on: June 20, 2016, 06:39:17 AM »
OK - thanks for the tip. I will try it and see what happens.

Thanks again
Rimmel

54
General Mach Discussion / Re: Mach3 m1076.m1s problem
« on: June 20, 2016, 06:17:14 AM »
No, exactly the opposite. It always goes into Taper mode at the start of the operation and then seems to figure out it is supposed to be in parallel mode and then stops and changes to parallel (breaking the threading insert).  I make sure I always have plenty of run into the thread as well. The spindle is quite stable and I'm using an optical spindle reader/sensor.

Like I say though it seems random, probably once every 10 runs (average). Sometimes more, sometimes less.

55
General Mach Discussion / Re: Mach3 m1076.m1s problem
« on: June 20, 2016, 05:55:45 AM »
I am using 062.

56
General Mach Discussion / Re: Mach3 m1076.m1s problem
« on: June 19, 2016, 07:56:06 AM »
The m1076.m1s macro is in the Mach3 directory.  E.g.  "C:\mach3\m1076.m1s"


I am using a Uniport motion controller.

Every thing else works perfectly - I am just trying to remove the Taper code from the macro.

thanks for the reply.

Rimmel

57
Mach4 General Discussion / Re: Mach 4 Turn UC100 questions
« on: June 17, 2016, 03:25:01 PM »
1) no
2) yes
3) no

Thanks for the reply - with no wizards it makes you wonder why anyone would "upgrade" though. Seems more of a downgrade to me.

58
General Mach Discussion / Mach3 m1076.m1s problem
« on: June 17, 2016, 11:54:51 AM »
Having a problem with the m1076.m1s macro.

If I repeated use the G76 macro in gcode (use G76 the same gcode file over and over) to create a parallel thread, then randomly the thread starts with a tapered thread and then half way though switches back to a parallel thread. It does it in such a way as to damage the tooling though. It seems the tapered setting is being cached somewhere????

I'm using Mach3 062.

Question for a mach3 dev or similar:-

How can I disable tapered threading completely in the m1076.m1s macro? (do not envisage using tapered threads). E.g hard coding "T0" (taper 0). I am a programmer so I just need to know what to set.

thanks
Rimmel

59
Mach4 General Discussion / Mach 4 Turn UC100 questions
« on: June 17, 2016, 08:30:55 AM »
1) UC100 support?

2) USB Shuttle Pro support?

3) Wizards? Are there any wizards for turning/threading etc like in Mach3

thanks

60
I cheat.
I can run my chuck in reverse, so I put the internal tool 'behind' the centre line and turn a test bar from behind, as it were. If the test bar comes out at 6.78 mm diameter, I enter -6.78 in the X value on the tool table page. This works 100% reliably, as you would expect.
Um - this assumes I have already set up the Master Tool 0 of course. That is ALWAYS an outside tool.

Cheers
Roger



Exactly what I do - I was just using the tool setup page incorrectly :-(

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