Tool runnig out on mill

[gorby]

Chuck and tool runing out .005" When check spindal Ok WITH
indicator ,chek tool holder both tappers ok,what is wrong? THANK yOU

[universalfab]

Have you checked your tool? If spindle and tool holder are to your tolerance liking when indicated, then how do you figure that you have .005" run out? What kind of tool in and tool out program are you using on your program? Sounds like to me you possibly need to calibrate your x,y, but if your just doing a straight plunge into your material and your machine is'nt that rigid you could be comming up with your endmill slightly walking from vibration also depending on your machines spec tolerances and if a older machine then all must be compensated . There is a few things that could be causing you to get this, one thing like I said at the begining of my comment is your tool, have your checked your endmill for the exact size with a mic,not a vernier, even though a vernier will be very close you want to use a mic. Even if your tool is new it is'nt going to be dead on what it says on the package it came in or on the tool. Maybe I answered your question, but if not then you need to explain more of the procedure your doing and material your cutting into.

[mactec54]

Are you running a drill chuck with a endmill or a tool holder for the endmill if you are using a tool holder the collet my be bad

[universalfab]

Could be I assumed and I guess thats where I went wrong in my advice that he actually put that dial indicator on his tool holder. Speaking of collet style tool holders, if you get a cheaper collet style tool holder you very easilly could be comming up with that problem for that. I've had a couple bad experiences with long runs with a inter changeable collet style tool holders a while ago. I bought a whole set of them and thought the convenience of being able to just swap the collet in and out with different tools on my 1 perticular cnc mill that doesn't have a automatic tool changer, but quickly found out that depending on length of the run the thing would loosen up and had a couple scrapped parts, not to mention the possible danger of having a endmill pretty much grenade in your face. So least to say I put my collet style tool holders up on the shelf and really don't use them. I prefer the tool holders with the set shank size and set screw to get best results, but they are costly for nice full set.

Originally Posted by mactec54 Are you running a drill chuck with a endmill or a tool holder for the endmill if you are using a tool holder the collet my be bad

[universalfab]

Does this have a high speed spindle?

[gorby]

We just check spindle today,we use blueing on tapper of collet and put it in spindle ,found un even contact between spindale and collet tapper ,spindle tapper wore out ,I need new spindle or to get somebody to resurface tapper ,but that my change hieght for tool changer,does any body have any commen on this those this make sence,thak You for reply and ideas

[universalfab]

Are you really from Canada?

[ckirchen]

To check the spindle taper, place an indicator inside the empty bore and turn it slowly. The indicator should not move. Repeat at several z height. If there is movement, the bore is either out of round or running out of true.

Next, put a drill blank into a collet chuck (preferrably both new). Use the same size blank as the collet; if the collet has to close too much, concentricity will not be maintained. Also, don't use a drill chuck (lower concentricity) or an endmill holder (by design, the setscrew pushes the tool to one side). Place an indictor on the drill blank and turn it slowly. The indicator should not move. Repeat at several Z heights. If there is movement, the tool holder is not seating properly.

I once heard that Haas designed the spindle bore with extra material for resurfacing, but I don't know if it's true. A quick call to you local HFO will answer the question. If it's not true, one of my old Haas catalogs says that a new spindle cartridge is $3,300 installed.

There is a parameter that you can change for a new tool change height. A search on CNCZone should bring it up.

>>> After a quick web search, I think it's parameter 64 (Tool Change Offset) that you would need to change after the bore is resurfaced.

[gorby]

When check spindle with indicator at bottom it was .0015 out fruther up it was between ,0003 to .0005, indicate brand new tool holder tapper inter chancable colets rus .005 out, i got qoute for new spindle installed 5000,does any body knows how much is to resurface and is it work? Thank You for Yours reply.

[ckirchen]

Your spindle bore doesn't sound like it's in very good shape...any idea why it's like that? Has the machine been crashed?

I don't see why resurfacing the spindle taper wouldn't work. I would start at the HFO; the servicemen will probably be able to recommend a shop to do the work. Just be sure to get a reference from someone who has used them before.

[gorby]

i just started using this mill few moths back ,so Im doing more surface milling,Ithink guy who was runing it before me had some crushs ,Thank You for help ckirchen.

[offsetxyz]

Your spindle taper can be re-ground right on the machine in less than 3 hours. A tech came into shop and repaired a spindle that way just last week. It was fast and simple and the spindle was badly damaged too. Cannot say who did it. I am in Texas and he was from Ohio in an Ohio licensed vehicle.