[SAV-CO]

Attachment 252606

HI FRIENDS
MY MACHINE IS VMC
IT PRODUCED OF SMTCL COMPANY.
MODEL : 850 E
CONTROL : FANUC 0I MATE MD

WE CHECKED THE COLUMN OF THE MACHINE, AND THEY ARE OK.
THE COMPANY'S ENGINEER CHANGED THE PARAMETERS (NO.1620) BUT COULD NOT SOLVE TEH PROBLEM.

PLEASE HELP
THANKS

[SAV-CO]

Attachment 252608

[ghyman]

Hard to answer without more information:
Machine / Control info? (What is parameter 1620?)
Material, cutting conditions, etc.

First glance, I would have to say this is Z-Axis backlash.

[SAV-CO]

WE CHECKED Z AXIS BACK LASH , IT WAS OK.
THE CONTROL IS FANUC 0I MATE MD
MACHINE SHAKES WHEN THE TOOL GOES TO THE CORNESR (WHEN THE AXIS CHANGED- X TO Y OR Y TO X)
IN ALL OF THE MATERIALS WE HAVE THIS PROBLEM

CUTTING CONDITION :
TOOL : BALL NOSED 12
3D OFFSET FINISHING(POWERMILL SOFTWARE)
SPINDLE 4500
FEEDRATE 2000
WITH COOLANT

[mactec54]

SAV-CO

Are you using Nano Smoothing, if your control supports this which it should, then try using it, this is all about how smooth you can get your machine to run, check the runout on your cutter as well

[Al_The_Man]

Looks like tuning could be the issue?
Al.

[SAV-CO]

SAV-CO

Are you using Nano Smoothing, if your control supports this which it should, then try using it, this is all about how smooth you can get your machine to run, check the runout on your cutter as well

How can i check nano smoothing?

[SAV-CO]

Looks like tuning could be the issue?
Al.

I didnt undestand your q
Please explain
Sorry , My english is not very good

[mactec54]

How can i check nano smoothing?

If you can read the PDF I posted it explains how to activate the Nano Smoothing, you do it with G-Codes, if it is active on your machine

[CroCole]

Hello
Shaking is produced by exact position stop from one block (G1) point to next block (G1) point. And movments and stops bethween points are small so u got shaking movments. We solved this on some machine using smoothing command ( NC look ahead and dont do exact stop if the angle is smaller in next line than the angle on specific parameter but when it is in position tollerance it jumps without stop to next block etc..) and on some we needed to tweak postprocesor to give G2 or G3 instead of massive G1 code because even a simple circle is generated in hundreds of G1 code (splines) instead of one or two G2 or G3 command.

[mcphill]

Are all cuts climb or conventional, or is there a mix? In the first photo, the angle of the "pushback" on the tool changes from one side to the other, so it seems like backlash (X or Y axis) could be a definite contributor.

[SAV-CO]

MY CONTROL DOES NOT SUPPORT "NANO SMOOTHING"

[SAV-CO]

Hello
Shaking is produced by exact position stop from one block (G1) point to next block (G1) point. And movments and stops bethween points are small so u got shaking movments. We solved this on some machine using smoothing command ( NC look ahead and dont do exact stop if the angle is smaller in next line than the angle on specific parameter but when it is in position tollerance it jumps without stop to next block etc..) and on some we needed to tweak postprocesor to give G2 or G3 instead of massive G1 code because even a simple circle is generated in hundreds of G1 code (splines) instead of one or two G2 or G3 command.

IS IT POSSIBLE TO CHANGE SEVERAL G1 CODES TO G2 AND G3 ?
IN MY PROGRAM I HAVE THIS CODE "G5.1Q1" , THAT IT SAVES ACCURACY IN CORNERS AND...

[SAV-CO]

Are all cuts climb or conventional, or is there a mix? In the first photo, the angle of the "pushback" on the tool changes from one side to the other, so it seems like backlash (X or Y axis) could be a definite contributor.

ALL CUTS ARE CLIMB , WE CHECKED THE BACKLASHES , THEY WERE OK.

[SAV-CO]

I BUY THIS MACHINE 8 MONTHES AGO, IT DIDNOT HAVE ANY ACCIDENT
2 WEEKS AGO THE COMPANY'S ENGINEEAR CAME TO OUR WORK PLACE , HE CHANGED SOME PARAMETERS AND TESTED IT
BUT WE COULD NOT GET ANY SOLOUTION.

[CroCole]

Did u try with G08 P1 ( lookahead on ) instead of G05.1 ??? P.s. G08 P0 is to turn lookahead off

[SAV-CO]

Did u try with G08 P1 ( lookahead on ) instead of G05.1 ??? P.s. G08 P0 is to turn lookahead off

I TRIED , MY CONTROL DOES NOT SUPPORT THIS CODE(G08 P1)

[SAV-CO]

THERE ISNT ANY BODY THAT EXOERIENCED THIS PROBLEM?

[mactec54]

SAV-CO

How old is your machine, what control is it using, if this is an older machine, this would be normal, to get a finish like this, if your machine is old, Your Encoder counts Per Rev are to low for this type of work

Look at the Nano control made by Fanuc, this will give you an idea of what is needed for smooth 3D milling like you are doing, there systems start at 10 million counts per rev

[Al_The_Man]

IMO this sounds like a design/integration flaw, for a machine that is only 8mths old and has a Fanuc 0i, which is a relatively new controller, the onus should be on the MTB to come up with an answer.
Al.