Author Topic: Lathe Screwcutting problem  (Read 7606 times)

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Offline Hood

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Re: Lathe Screwcutting problem
« Reply #10 on: November 15, 2008, 02:05:22 PM »
Jim that is good news, well bad but good ;) Hopefully Art will be able to determine where your problem lies.
 I believe www.routoutcnc.com have the SmoothSteppers, they dont seem to advertise it, possibly because they do their own similar device. I know one member here emailed them and got a price but he was actually around £20 better off getting direct from Greg even when customs grabbed some money from him. Exchange rate has changed so possibly it would be cheaper to get from them now, one way to find out I suppose :)
 Bit far to go for a chat :D

Hood

Offline fisherjim

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Re: Lathe Screwcutting problem
« Reply #11 on: November 15, 2008, 03:53:44 PM »
Problem sorted.  I needed a 3 second delay before threading to give the machine time to reduce RPM from 2000 on turning to 400 for threading.

Thanks to Hood for the advise and to Brian for the solution. Much appreciated.

Jim  

Offline Hood

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Re: Lathe Screwcutting problem
« Reply #12 on: November 15, 2008, 03:55:56 PM »
Excellent news, yo would still like the SS though LOL
Hood

Offline RICH

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Re: Lathe Screwcutting problem
« Reply #13 on: November 15, 2008, 07:16:01 PM »
Hood,
Does backlash compensation work with the G32 when using the PP & V.018?
RICH

Offline Hood

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Re: Lathe Screwcutting problem
« Reply #14 on: November 15, 2008, 07:18:20 PM »
Sorry Rich, Dont have a clue, I have never used backlash comp on any of my machines.
Hood

Offline RICH

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Re: Lathe Screwcutting problem
« Reply #15 on: November 15, 2008, 07:57:04 PM »
Well i quess it's time to find out.
Will post here after i install the latest version on the turtle but solid laptop with a PP.
Never used the G32 for threading but can generate the turning code reguired.
Another case of ADD CNC in the shop!  ;D
RICH
 

Offline Hood

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Re: Lathe Screwcutting problem
« Reply #16 on: November 15, 2008, 08:01:41 PM »
:)

Offline RICH

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Re: Lathe Screwcutting problem
« Reply #17 on: November 15, 2008, 09:55:34 PM »
Hi All,
MACH V 3.042.18 using PP / NEC LAPTOP with PP.
Just DRY ran a number of thread cut tests and don't seem to have any problems.
The backlash compensation works during threading, no index problems.
Feedrate changes on the rapids to what it should be, feedrate and rpm DRO change accordingly to slow down of and speed up of the spindle ( speed up only after a spindle slowdown ) ( response seems to be rather quick ), G94 & G95 change correctly.

I like the new diagnostics.

So looks good on my end. BTW my spindle rpm is set manualy. I quess the only bummer is if you don't have a program
which generates the G32 threading code.
Will try some actual cutting tomorrow and see what happens.
RICH

Offline Hood

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Re: Lathe Screwcutting problem
« Reply #18 on: November 16, 2008, 03:21:31 AM »
You can generate the code in the wizard by altering your macro I think. If you change Test=False to Test=True I am sure it puts out the G32 code.
Hood

Offline RICH

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Re: Lathe Screwcutting problem
« Reply #19 on: November 16, 2008, 08:18:01 AM »
Hood,
Which file needs to be modified. Is it  M1076.m1s located in MACH DIRECTORY as shown or one of the files located
in Mach3\macros\Mach3Turn
Macros are uncharted territory for me. I may be lost in the ocean!

RICH