Friday, April 8, 2011

Probing with a Haas Mill

Renashaw probes are one of the best ways to increase efficiency in a job shop.  I am not the biggest fan of Haas machines but with all of the cost effective features like the probe it is very hard to even think about other machines.  If my memory serves me correctly the last machine we purchased came with a probe and tool setter all for around $6000.00.  It is very hard to beat that.


We use the probe for a hole variety of different tasks from setting offsets, tool break detection, material analysis and referencing part dimensions.  These probes are only as limited as your mind and ability to write macros and sub routines.


A lot of probe operations can be written in a word doc and saved for next time you need them.  Some times I probe a 40mm boss on a prototype this is a program I saved in a word doc to be placed in a manual entry tool path at the beginning of a program.  So when it comes time to load a part in soft jaws I only have to eye center and probe Z, then run the program that will do everything for me.  This is a very fast and easy way to run prototypes.


here is a reference for the Probe codes


These program may not be compatible with your machine!! please do your homework before you run any program!
(probe sub for probing 40mm boss, sets G54 X0. & Y0.)
/T25 M6
/G00 G54 G90 X0. Y0.
/G43 H25 Z2.
/G65 P9832 (PROBE ON)
/G65 P9810 Z.25 F120. (PROTECTED MOVE)
/(probe boss)
/G00 G90
/G65 P9023 D1.575 S54.A2. Z-.5
/G65 P9832 (PROBE ON)
/G65 P9810 Z2.F120. (PROTECTED MOVE)
/(PROBE OFF)
/G65 P9833
/G28 G91 Z0.
/M01


Most times we have part that takes more than two operations we use the probe for the last couple operations.  Generally on a third operation you have a part that is already to its finish dimensions so you can probe the datums to set the offsets on each part, taking out most of the potential deviations and almost all setup time (assuming you just have to insert an existing probe routing into your program).




This program probes X and Z and sets G54 X and Z.
/T25 M6
/G00 G54 G90 X-.3. Y-2.
/G43 H25 Z2.
/G65 P9832 (PROBE ON)
/G65 P9810 Z-.5 F120. (PROTECTED MOVE)
(Probe x +)
/G00 G90
/G65 P9023 A5. S54.
/G65 P9832 (PROBE ON)
/G65 P9810 Z.25 F120. (PROTECTED MOVE)

/G65 P9810 X 3. Y-2.F120. (PROTECTED MOVE)
(Probe Z)
/G00 G90
/G65 P9023 A9. S54.
/G65 P9832 (PROBE ON)
/G65 P9810 Z2.F120. (PROTECTED MOVE)

/(PROBE OFF)
/G65 P9833
/G28 G91 Z0.
/M01
There are times when your material may not clean up because it is thinner than you expected and if you adjust your offsets down enough for clean up you may cut into your hard jaws.  So if I am in this situation I write a program to come down and probe Z on the material with a different offset then I am using.  Then I write IF[#5243LT#5223]#3000=15(the stock is to thin) or if G55 Z is less then G54 Z the stock is to thin.


This program Probes Z to check if the stock is taller then the G54 offset.
/T25 M6
/G00 G54 G90 X3. Y-2.
/G43 H25 Z2.
/G65 P9832 (PROBE ON)
/G65 P9810 Z.25 F120. (PROTECTED MOVE)
(Probe Z)
/G00 G90
/G65 P9023 A9. S55.
/G65 P9832 (PROBE ON)
/G65 P9810 Z2.F120. (PROTECTED MOVE)

/(PROBE OFF)
/G65 P9833
/G28 G91 Z0.
/IF[#5243LT#5223]#3000=15(the stock is to thin)
/M01

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