I am in the process of Tramming my Tormach Mill and have a couple questions on the correct way to do this operation.
First some back ground. I decide to build my own Stand, the Frame being made out of 2" square tubing, covered with sheet steal. I have a screw type adjuster at each corner of the Stand for leveling the Stand to the Floor. I have four 3/4" steel mounting pads for the Mill to sit on. These Pads are in turn sitting on the 2" square tubing.
My initial check of the Tram I came up with the following numbers?
Front Y = Zeroed Dial Indicator.
Rear Y = -0.003
Left X = -0.005
Right X = +0.002
So the Y is out 0.003 (Table low at the rear)
And the X is out 0.007 (Table low on left side)
(1) For my above numbers were would you start inserting the shims? Is this trial and error?
(2) I understand that the Tormach uses a thin sheet of hard rubber between the Mill Base and the mounting pads on the Stand. Is this rubber necessary? You would think that the rubber could cause changes in the Tram depending on the weight put on the Mill Table.
(2) I also understand that Tormach recommends shimming between the corner of the Mill Base and the Stand to adjust the Tram. I always thought that you shimmed the attachment points between the Vertical Column and Base and/or between Vertical Column and Mill Head to adjust the Tram?
(3) What would you think the Mills mounting bolts should be torque to? I don't think they should be to tight. Was thinking of approximately 5 to 10 ft. lbs.
(4) Do you know of any good articles on Tramming a Milling machine?
Thank you for your help with my questions on Tramming a Mill.