- Joined
- May 31, 2018
- Messages
- 184
Hi all,
I was in the workshop yesterday happily turning away when I noticed that my DRO had drifted. Going back over the parts I was making it suddenly shifted by 1.3mm diameter after about 2 hours of machining. The drift was sudden, i.e. all dimensions were fine then the last three diameters were all out by the same amount (approx. 1.3mm). Thankfully I noticed as I must admit I have become quite reliant on the DRO as up until today it has never been out by a significant amount.
I do have a theory that it was the magnetic base which I put on the cross slide next to the scales. It's a glass optical system so I would have thought that the mag base shouldn't cause an issue? The timing does coincide with the drift however I couldn't replicate the drift by placing the mag base in various locations on and around the scales afterwards which has left me rather puzzled.
One thing I have also noticed is that it can drift when the machine is not in use. Because of this I always check before each use but I'm still puzzled as to why it has been doing this. In this instance there wouldn't be a mag base anywhere near the scales.
So I'm wondering if anyone else can suggest a reason as to why my DRO drifts?
Thanks,
Sam
I was in the workshop yesterday happily turning away when I noticed that my DRO had drifted. Going back over the parts I was making it suddenly shifted by 1.3mm diameter after about 2 hours of machining. The drift was sudden, i.e. all dimensions were fine then the last three diameters were all out by the same amount (approx. 1.3mm). Thankfully I noticed as I must admit I have become quite reliant on the DRO as up until today it has never been out by a significant amount.
I do have a theory that it was the magnetic base which I put on the cross slide next to the scales. It's a glass optical system so I would have thought that the mag base shouldn't cause an issue? The timing does coincide with the drift however I couldn't replicate the drift by placing the mag base in various locations on and around the scales afterwards which has left me rather puzzled.
One thing I have also noticed is that it can drift when the machine is not in use. Because of this I always check before each use but I'm still puzzled as to why it has been doing this. In this instance there wouldn't be a mag base anywhere near the scales.
So I'm wondering if anyone else can suggest a reason as to why my DRO drifts?
Thanks,
Sam