CNC VMC: Learn to setup Tool break sensor (TBS)

on

FANUC TBS Setup for VMC,HMC




TBS stand for Tool Brake Sensor In this blog you will learn following


1) Basic of TBS
2) Is this important for you?
3) Know to set up in machine
4) Know how to set up in program
5) What to do if tbs failed to work
6) Some important terms


1) Basic of TBS


TBS stand for Tool 
Brake Sensor . It is an electronic device used to detect tool Breakage.


  This device is connected with NC micro processor and after checking send signals to machine and also used to avoid further losses after tool Breakage.


2) Is this Important for you?


Its depends on various factors. let's see,

  • If you are working in mass production manufacturing unit and want to control rejection due to tool Breakage Then this TBS is for you.

  • If you're manufacturing part is costly.

  • 3) If most of your operations is based on drilling, reaming, tapping,chamfering. then this lesson is worth reading for you.


Warning : you cannot set TBS for cutter and other large diameter tool's.

3) Setup TBS in machine


Set-up of TBS is quite simple but becouse of you're doing this first time this process might take some times. You we will do it step by step.


A) Select and fix TBS on fixtures manually


you have to manually fix the TBS on fixture. see the image.

Image credit  : www.gstatic.com


ok ,now you have proper fixed TBS on fixture. now all we have to do is coding part. Make sure you already done proper wiring and connection with machine. if you don't know how to connect see your machine user manual

B) Get the exact position of TBS

WARNING : do not select cutter and other large diameter tools.

Now move your TBS button right below the spindle tool (For VMC) and smoothly tap the sensor button with tool until alarming light on



C) Note down machine axis data

Now open the machine position page. and note down all axis exact position

This values are X, Y and Z Now assume this values are as follows,

X = 300
Y = 200
Z = 400

 D) Input in parameters

         open settings of machine open micro-variable Now search value

G901 and enter value TBS X axis position value you have note down, which is 300 

search for G902 in micro variable and put value of Y which is 200 ( assumed value) 

Now this is last step but, little more complicated 

Search for G903 and just Note down the value 

Now do this calculation,

(Machine G903 value)
- 
(Selected tool offset + Z axis position value)




Assume your tool length offset is 100


(400) -(100) = 300
 
so, 300 is your answer. Now enter this value in G900 

4) Run in program


For FANUC you just have to simply write this line of code after selected tool operation finish

G910 S2 H2 ;
 

Yours setup completed .

 
Don't know what is H or S ?
Don't worry, Download our LearnCNC app to get more stuff.


5) What to do if TBS failed to work?


Well, there is one proper method for FANUC controller to check TBS working or not

1) Open settings (Press 0 and navigation key on opening panel)

2) Select OPRT option (soft keyboard)

3) Enter value X4.7 and search (search option in soft keyboard)

4) Press manually TBS sensor button and check value of in X4.7

5) If the value changes from 0 to 1 then TBS is working and if value is not changing then TBS is failed to work

6) Important terms


1) G901 = TBS Position of X axis 

2) G902 = TBS Position of Y axis 

3) G903 = Total value of Z axis from TDC to BDC

4) G904 = TBS button press distance 

5) G905 = Determine tool detection after particular distance travel 

6) G910 = TBC program call


Declaration :

This Setup is for FANUC controller and only applies for few models.To avoid further losses check out



Fanuc

Renishaw probs


Thanks for your attention



For more CNC stuff

Comments

Post a Comment