First, thank you to all the contributors to these forums. As a complete novice, I have spent much time reading and learning. I Currently have a Sieg X2 and C3. No plans for CNC, but hope to add DRO's and belt-drive in the near future. My workshop holds a steady 13*C/55*F
I have tried searching, but have not found answers to how much runout is common on the X2?
At the moment, I am very unhappy with my mills performance. Runout at the tip of my engraving bit is 0.6mm/0.023 inches. I only have a cheap DTI, but I don't need it to see I have way too much tolerance. I am currently running a 3MT spindle, and a chinese ER25 collet chuck. I have made similar tests with the keyed chuck that came with the mill. All parts have been cleaned, without affecting tolerances.
The measurements I have made so far, are 0.01mm/0.004 inches at the upper spindle, 0.03mm/0.0012 at the lower part of the spindle(approx 15mm lower). These measurements are taken OD. ID gives the same numbers. When installing a small bit(my most precise object to mount in the collet), I measure 0.1mm/0.012 close to the collet, and it gets worse with a longer bit/further down.... The worst being 0.6mm/0.023 inches
The mill seemed fine at first(drilling and tapping M1.2), but on my second run, I noticed the centre drill making a "W"-hole, not the "V"-hole I would expect. On trying my engraving bit, it made a very rough 1mm wide track. Very far from my first 0.1mm lines.
My questions are:
What is expected runout at (ID) the mouth of the spindle?
Is this multiplied by distance(longer bits/chucks)?
Is there an easy way to measure runout in the collet-/chuck?
If the original spindle bearings have been damaged in any way, what do you replace them with? Sieg replacements, or any upgrades?
Any advice or hints on further steps to locate and minimize the runout would be much appreciated.
Brgds,
Edvard,
Norway
I have tried searching, but have not found answers to how much runout is common on the X2?
At the moment, I am very unhappy with my mills performance. Runout at the tip of my engraving bit is 0.6mm/0.023 inches. I only have a cheap DTI, but I don't need it to see I have way too much tolerance. I am currently running a 3MT spindle, and a chinese ER25 collet chuck. I have made similar tests with the keyed chuck that came with the mill. All parts have been cleaned, without affecting tolerances.
The measurements I have made so far, are 0.01mm/0.004 inches at the upper spindle, 0.03mm/0.0012 at the lower part of the spindle(approx 15mm lower). These measurements are taken OD. ID gives the same numbers. When installing a small bit(my most precise object to mount in the collet), I measure 0.1mm/0.012 close to the collet, and it gets worse with a longer bit/further down.... The worst being 0.6mm/0.023 inches
The mill seemed fine at first(drilling and tapping M1.2), but on my second run, I noticed the centre drill making a "W"-hole, not the "V"-hole I would expect. On trying my engraving bit, it made a very rough 1mm wide track. Very far from my first 0.1mm lines.
My questions are:
What is expected runout at (ID) the mouth of the spindle?
Is this multiplied by distance(longer bits/chucks)?
Is there an easy way to measure runout in the collet-/chuck?
If the original spindle bearings have been damaged in any way, what do you replace them with? Sieg replacements, or any upgrades?
Any advice or hints on further steps to locate and minimize the runout would be much appreciated.
Brgds,
Edvard,
Norway