- Jul 28, 2018
- Reaction score
Greetings everyone I’m new to post here and have a question for anyone who has experience or prior experience with the issue I am contending with. I’ve had this 13 x 37 lathe for around 6 months now and it’s been a good machine. I’ve done a few pre CNC upgrades but now I have all the components here so in preparing for my retrofit I want to get this leveled out. I’ve noticed and verified it has settled enough that the parts I have been turning had developed a significant taper (.026). The initial mistake i made was using hard rubber pads under the adjustment feet which is where the settling came from. This was in effort to keep it from moving about the floor, reduce potential vibration, and give me some room to manipulate leveling. Initially this worked well. Low and behold it was just a bad idea. That aside I removed the rubber feet and I am having a heck of a time leveling the stand. Stand consists of two lower cabinets and a center plate connecting them with coolant drip plate at the top.., typical of course. So I lowered all 8 adjuster feet and at the right side as far as it can go (7/8”). The left side points toward the garage door and in fact only a few inches clearance so you can imagine the floor taper I am dealing with. With approx a 1” taper toward outside in the 5ft span of the stand. So I made a couple large 6061 blocks for the front to get rid of the front adjuster feet and have a set level face to ease setup. I tapered blocks to match the floor and checked with a machinist level so I know that the front two blocks left to right are level to .005 per 10” span. This had no bearing on the actual bed being level yet. I will deal with that later. So now I want to level front to back. It seems the 12” span that the stand has a 1/8” drop to the rear as the floor appears to not only taper toward the garage door but towards the center of the garage dividing line. This lathe is approx 18” from this center line if you can imagine it now sitting on a double taper. As I stated I have the front level. As soon as I try and crank the leveling feet up in the rear to tilt the lathe forward “one foot adjuster only” it lifts the entire front lathe at both ends right up off the blocks I had it resting on. So the stand and lathe are apparently rigid. I did loosen the base fastners from lathe to stand to free assembly up. I had all but one foot loose and could go around and move them all by hand (rattling around) and the entire lathe had its weight balanced on the one adjuster foot. This is obviously the heavy corner where the CNC control cabinet is attached, 3ph motor, vfd, etc. I thought well I will just lift up on the attached cabinet adjacent to it further off the back of the lathe. Unfortunately the cabinet is not as strong and it simply flexed doing nothing to help tilt the stand forward. The only thing I can think of is to drill holes in the floor and attach the stand so I can pull down on the corners removing the apparent twist and forcing against the settled misalignment. Problem with this is that it isn’t my home to modify. Mentioning the issue to the family member I live with I had a negative response about drilling into the floor so I’m looking for an alternative method to getting this stand assembly to straighten out and remain level. At which point I will then shim the lathe atop the stand to compensate for any differences between the top side of the cabinets and at each end. Keep in mind I run coolant and we don’t want that running off the end tray either. To clarify I have been using a machinist level to .005 per 10 inch which i am sure is suitable for leveling this enough to rid the twist in the bed and misalignment from the chuck to tailstock. A few photos attached to clarify what I’m staying and hopefully I made some sense here. To add; Moving the lathe isn’t an option I haven’t anywhere to put it and it bows the roof trusses winching it up enough you can watch the outside rooftop dip so I don’t want to create further issues and so it needs to stay put until I move it out of here sometime in the future. Please share what you’ve done and if you dealt with a similar issue that would be greatly appreciated or if you’d just drill holes in the floor and patch them up later not saying anything? Something I’m considering I don’t want this sitting like this anymore and becoming impossible to reverse any settling in the future.