[4]

Mill Traming

[3]
[10] Like what you see?
Click here to donate to this forum and upgrade your account!

richz

Active User
Registered
Joined
Jan 19, 2012
Messages
143
Likes
53
#1
Question on mill traming. Awhile ago I was reading about someone who used treaded rods to tram their mill. There was talk about a loss of rigidity and someone else also stated that if it was done this way it should be grouted. When I tramed my PM932 I have one side shimmed with 0.020 thousands. Technically the two surfaces would not be touching. Should this be grouted?
 

Winegrower

H-M Supporter - Silver Member
H-M Supporter - Silver Member ($10)
Joined
Jul 29, 2014
Messages
149
Likes
133
#2
I have a Bridgeport. And no grout. And no treaded rods.
There must be something about tramming this PM932 mill that’s way different?
 

COMachinist

Active User
H-M Platinum Supporter ($50)
Joined
Sep 10, 2013
Messages
293
Likes
107
#3
You don’t need grout or shims to tram the PM-932 mill side to side. You adjust the head tilt toget the side to side tram, and a long pieces of shim stock to adjust nod front to back tilt. I have my 932m PDF so close it cuts mirror facing cuts no ridges. It stays in tram too.
Good luck.
CH
 

warrjon

Active Member
Registered
Joined
Jun 26, 2018
Messages
69
Likes
26
#4
I had an RF45 clone a while back and shims under the column did not effect rigidity. I had the column shimmed for tilt and nod.

I also replaced the 4.6 column bolts with 12.9 and added additional torque to the bolts.

You need to tram the column in both X and Y. If you only tram nod and the column is leaning (as mine was) it will effect X axis positional accuracy when you move the head up and down. You can check this by boring a hole with the head down as far as possible, raise the head as high as it will go and use a centre finder to check if it is still centred in the hole.
 
[6]
[5] [7]
Top