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Type: Posts; User: sinha

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1. ## Thread: Offset Tool Wear compensation help milling.

by sinha
Replies
6
Views
493

### Yes, provided you are using G41/G42.

Yes, provided you are using G41/G42.
2. ## Thread: Offset Tool Wear compensation help milling.

by sinha
Replies
6
Views
493

### -0.5 on radius means that you are specifying a...

-0.5 on radius means that you are specifying a smaller radius, whereas the tool has a larger radius. So, it will overcut. But, this will come in picture only if you are using radius compensation....
3. ## Thread: Lathe G76, how close can you get on Z to a wall?

by sinha
Replies
24
Views
1,417

### According to Fanuc manual, the retraction...

According to Fanuc manual, the retraction distance is not dependent on rpm.
4. ## Thread: Lathe G76, how close can you get on Z to a wall?

by sinha
Replies
24
Views
1,417

### Definitely a good and safe practice.

Definitely a good and safe practice.
5. ## Thread: Sharing a Macro Conditional Branching Math Experience...

by sinha
Replies
12
Views
1,023

### What I still do not know is why, even today, ...

What I still do not know is why, even today,

1. Memory is an issue with CNC ?
2. The in-built calculator of an ordinary computer is more accurate than CNC ?
6. ## Thread: Sharing a Macro Conditional Branching Math Experience...

by sinha
Replies
12
Views
1,023

### Typically, an error of 10 to-the-power -10 gets...

Typically, an error of 10 to-the-power -10 gets introduced in each arithmetic calculation. Therefore, #501 is definitely not equal to -0.675 after 20 additions. However, it would not show up on the...
7. ## Thread: Sharing a Macro Conditional Branching Math Experience...

by sinha
Replies
12
Views
1,023

Another thing to mention is, rounding/truncation is automatically done by the control if there are more number of decimal digits than the least-input-increment decimal digits (3 in metric and 4 in...
8. ## Thread: Sharing a Macro Conditional Branching Math Experience...

by sinha
Replies
12
Views
1,023

### As explained by Bill, it was caused by floating...

As explained by Bill, it was caused by floating point error in calculations, not because of rounding to 0.0337
If the DOC is added 20 times, it may not be exactly 0.675
Even if it is 0.67495, the...
9. ## Thread: Macro B programming

by sinha
Replies
9
Views
1,385

### In my opinion, Fanuc NC Guide is the only...

In my opinion, Fanuc NC Guide is the only simulation software which can be relied upon 100%.
10. ## Thread: Macro B programming

by sinha
Replies
9
Views
1,385

### CNC is not my regular day-to-day activity. I am...

CNC is not my regular day-to-day activity. I am in a teaching job where CNC is one of the subjects. I studied Macro B in quite detail and also experimented a lot on fanuc machines to verify my...
11. ## Thread: Cross Peck Drilling Code Help

by sinha
Replies
16
Views
990

### The Operator's Manual does cover G83 and G87, but...

The Operator's Manual does cover G83 and G87, but it will have to be read in association with the parameter manual for complete information. For example, the manual says that R is always incremental...
12. ## Thread: Cross Peck Drilling Code Help

by sinha
Replies
16
Views
990

### Depending too much on a CAM software can be...

Depending too much on a CAM software can be dangerous. All machines are slightly different because of parameter settings. A perfect post-processor is a myth. Sufficient knowledge of manual part...
13. ## Thread: Cross Peck Drilling Code Help

by sinha
Replies
16
Views
990

### You may like to have a look at this...

You may like to have a look at this.
The information I gave was copied from this only. There is a lot more to read.
14. ## Thread: Cross Peck Drilling Code Help

by sinha
Replies
16
Views
990

### Quite a few things are parameter dependent. The...

Quite a few things are parameter dependent. The following information is for Fanuc ...

Position of R-point
In G-code system B and C, depending on certain parameter settings, R would either always...
15. ## Thread: Cross Peck Drilling Code Help

by sinha
Replies
16
Views
990

### Are you using g-code system A, B or C ? Are you...

Are you using g-code system A, B or C ?
Are you in absolute or incremental mode ?
G83 is for front drilling and G87 is for side drilling.
16. ## Thread: Macro B programming

by sinha
Replies
9
Views
1,385

### NC Plot is not 100% compatible with Fanuc Macro...

NC Plot is not 100% compatible with Fanuc Macro B.
For example, the following statement copied from their manual would alarm out on a Fanuc:

Comparison examples:
#100 = #101 EQ #102
If #101...
17. ## Thread: SV-2412 tool change macro question

by sinha
Replies
10
Views
933

### Is it because T1 M6 needs a small delay on this...

Is it because T1 M6 needs a small delay on this machine ?
18. ## Thread: Macro Programming Fundamentals

by sinha
Replies
714
Views
462,809

by sinha
Replies
60
Views
3,785

### Fair enough. But, what is the harm in using...

Fair enough.
But, what is the harm in using P--10-- in the parts you have machined (where machining up to the shoulder was not required)?
It surely takes the pressure off the insert gradually which...

by sinha
Replies
60
Views
3,785

### You have given some good information to us. Thank...

You have given some good information to us. Thank you!

Based on your experience, I am of the opinion that, for LARGE threads, one must use P--10-- or a higher value such as 15.

by sinha
Replies
60
Views
3,785

### That was with P--10--. The reduced depth of the...

That was with P--10--. The reduced depth of the last thread can be seen.

by sinha
Replies
60
Views
3,785

### Yes, it is happening in every pass. This may have...

Yes, it is happening in every pass. This may have some effect if the helix angle is large. Otherwise, how can the increased load on the insert be explained, as observed by Brent?

by sinha
Replies
60
Views
3,785

### Brent has observed increased load on insert at Z...

Brent has observed increased load on insert at Z end when zero chamfer distance is specified.
This is probably caused by the insert suddenly cutting excess material by its leading edge when the feed...

by sinha
Replies
60
Views
3,785

### I have now come to the conclusion that this...

I have now come to the conclusion that this feature is useless and one should always program P--00--, with the understanding that, in most cases, the last one thread will have incorrect pitch. In...