VF4 head out of square?

C

cc22288

Aluminum

Joined

Dec 27, 2019

• Jan 3, 2022

• #1

Running a VF-4 with pallet changer. Face milling top surface of a part. Getting overlap steps. Problem almost certainly not my DOC/feed/speed/etc.. problem too drastic. Like... .005"+ I believe the machine needs to be leveled but also that the Z column is not squared to the table. Does anyone have any resources that detail how to adjust the machine into square? is there a gib on the column or something? thanks in advance.

Chris

 

doug925

Titanium

Joined

Nov 21, 2002

Location

Houston

• Jan 3, 2022

• #2

Leveling - VMC

You will need a good, calibrated, graduated, 0.005"/ft level, a wrench, and a helper would be nice.
It is not too difficult, but can take an hour or two, depending on your machine, floor, and luck.

Doug.

 

R

ripperj

Stainless

Joined

Dec 8, 2015

• Jan 3, 2022

• #3

You miss a zero? On the level recommendation?


Sent from my iPhone using Tapatalk Pro

 

M

MaxPrairie

Hot Rolled

Joined

Jul 9, 2015

• Jan 3, 2022

• #4

Level the table then sweep the spindle. The adjust for the spindle is to shim it. Typically vf4 and smaller rarely require shims.

 

DavidScott

Diamond

Joined

Jul 11, 2012

Location

Washington

• Jan 3, 2022

• #5

Is your head out in the Y axis or X? Shimming should only be done once you know exactly where the error lies. My guess is the head crashed into something while the table was rappiding in X, which will require realinging the head casting on the Z axis blocks.

 

doug925

Titanium

Joined

Nov 21, 2002

Location

Houston

• Jan 3, 2022

• #6

ripperj said:

You miss a zero? On the level recommendation?


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Click to expand...

yes.... doh!

 

H

Houndogforever

Hot Rolled

Joined

Oct 20, 2015

Location

Boring

• Jan 3, 2022

• #7

I thought that was a feature, not a bug?

 

Speedie

Stainless

Joined

Feb 24, 2009

Location

Midwestern MN/Wi USA

• Jan 4, 2022

• #8

You may need to refinish the pallet mount surface. Haas was known to put the lip seals in the wrong spot

 

C

cc22288

Aluminum

Joined

Dec 27, 2019

• Jan 20, 2022

• #9

Hey all!

Sorry I havent replied.. i got the big rona and was out...

I followed the leveling procedure and the machine is now level with no bow or twist. (Thank you @doug925)

Sweeping the spindle on the table gives me a .030" difference from front to back, but the left and right are dead on.

I'm thinking this machine was crashed and shimming is the way to go. I just need to know where the shims go. Do they just slide in right under the mounting bolts where the spindle motor housing makes contact with the casting??

thanks!

 

DavidScott

Diamond

Joined

Jul 11, 2012

Location

Washington

• Jan 20, 2022

• #10

Is the surface you are sweeping coplanar with the X and Y axis travels? Is the Z axis travel perpendicular? You need to know exactly where the problem lies before fixing it. What diameter is your sweep?