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No toolchange
« on: January 01, 2008, 02:17:42 PM »
Hi everyone,
Happy new year.
I have just completed setting up my lathe with Mach3 v3.0
I have got the CSS sorted with the index pulse, works well.
I have a quick change tool holder. (infact 2 in front and 1 at the back)
I have setup the tools in G53
when I run my program the tool number stays on 0, enven though it asks for tool change.
Please help

Offline Hood

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Re: No toolchange
« Reply #1 on: January 01, 2008, 02:40:58 PM »
You need to put the tools in the format of Tool number then Tool offset
So it would be like T0101 for tool 1 offset 1 or T0102 for tool 1 Offset 2.

You can miss out the 0 at the start and have eg T101

Hood
Re: No toolchange
« Reply #2 on: January 01, 2008, 03:11:01 PM »
Thanks Hood, it works but it doesnt.
I get the maching moving very slowly to some weard position after tool change.
the Offsets are correct because when i manually change the tool in the tool number window and MDI a position it goes to the correct position. eg X50,Z50
I may have something wrong in my NC file could you please take a look for me
Thanks Freidrich
PS in may be due to the fact that i am using G95

Offline Hood

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Re: No toolchange
« Reply #3 on: January 01, 2008, 03:34:16 PM »
try it without the G0 infront of the T202
Hood
Re: No toolchange
« Reply #4 on: January 01, 2008, 03:46:14 PM »
Hi Hood,
I did in the first place , then I put g00 in front thinking it would force modal g00
with G00 or without it creeps to some weard position
I think if the rest of the setup is ok, I will try changing to G94 and addapt the speeds and feeds and see what it does.
does the tip dir have to be setup, my path is cad generated so it precompensates for tip rad.
Thanks Friedrich

Offline Hood

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Re: No toolchange
« Reply #5 on: January 01, 2008, 03:52:34 PM »
Might be worth trying the G94 before the toolchange and then G95 after, you could probably edit your Post Processor to do that for you when a toolchange is called for. I am not great with code so take what I say with a pinch of salt, Graham Waterworth is your guy for that.
 Nope if its CAM generated no tip dir or radiusĀ  needed.

Hood
Re: No toolchange
« Reply #6 on: January 02, 2008, 02:53:11 AM »
hi Hood,
still no luck, i setup the tools as in the manual, in program coords, the macine cords are the same when i go to them,
when the program runs, i dont know where i am, i put in G53 or G54 and it makes no diffs, i still get this slow moving to some strange position.
maybe I am not setting the tools up correctly, but why would it work in manual mode when i select toolnumber and move to a coord its, correct.
in manual mode when i call a tool the coord display changes to the new position but the axis stands still, this is correct, so why do the aixs move under auto mode?
(I have a Harding cnc with a NUM control on it. so i understang the consept)

Offline Graham Waterworth

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Re: No toolchange
« Reply #7 on: January 02, 2008, 03:43:32 AM »
At the end of each tool, after it rapids to tool change position insert Tnn00, this cancels the last tool offset. nn is the tool number in use.

There are a few bugs it turn, this may be one of them.

Graham.
America gave us powered flight, England the steam train and Germany the car.  Who invented the first boat?
Re: No toolchange
« Reply #8 on: January 02, 2008, 03:55:02 AM »
Hi Graham,
thanks for the reply, I will try it as soon as i get home, I am one of the furtunate ones working today, I do service and calibration of 3D measuring machines (Wenzel), bussy at BMW during their shutdown. I will let you know how i get on
Thanks Friedrich

Offline TonyP

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Re: No toolchange
« Reply #9 on: January 02, 2008, 04:50:54 AM »
Hi Friedrich,

If you're trying to use front & rear posts in the same operation, forget it. I've spent a lot of time trying to make sense of it, and the answer is that it doesn't work at the moment. The offsets work fine until you change toolposts, then everything gets messed up. I've written about it quite extensively in previous posts.

Tony
« Last Edit: January 02, 2008, 04:56:08 AM by TonyP »