I was trying to get some ideas of a good productive way to line up the holes down at the machine itself so we aren't stuck putting a guide pin and level to every part because we have so many of these parts This could work it might be something we will just have to try and see how it plays out. The only hard part would be making sure the dowel pin doesn't bind too much when clamping. If we bore our jaws at the top of the stroke and drill the hole perfect and have the location(back of the jaws) just right it might work out. We do have the tailstock coming up for support during the drilling so we would have to have some sort of location for the part(also overall length consistency). Thanks for the responses so far

I was trying to get some ideas thrown around to effectively line up bolt holes in a cylindrical part on a Mori NL-3000Y mill turn with "Y" axis. The parts we are looking to do are approx. 3.0" in diameter and 20.0" long. They have through holes on each end of the pin going through the diameter approx. 7/8" from each face (2 holes). We have a steady rest and a stop tube for through jaw operations. What we have done in the past is face pin and drill the hole, then flip the pin and this is where we need to line up the hole that was done from the first side with the hole we will be putting in on the other side of the part. So we would line up the hole with a part on the jaw and once we figure out that angle we adjust the work offset accordingly for the "C" axis zero. Do you guys have any good ideas for positioning this hole quickly and so it will be spot on inline every time. Like I said it is just clearance for a bolt (we allow 0.0625" for bolt hole clearance)? I would love to be able to do both of these holes at the same time but with a 15.0" 3 jaw chuck we run into a lot of clearance issues. I attached a MCX file and if you run it through verify it will give a better explanation of what I am dealing with. Thanks for any responses N207V118.MCX-6

I think we got it figured out. It engages manually into the upper turret and you tow it along and have to manually bolt it down. This is probably why we never used it.

We have a Okuma impact lu-25 with an osp7000l control on it. I am not familiar with osp controls and we are trying to get the tail stock to work. We have limited books because I believe the company bought this machine used a little while back. The only thing we have been able to get it to do is advance and retract with manual entry of "M" codes. It looks to me like the tailstock is tow along but may also be programmable. Does anyone have any suggestions of things we could try out? Thanks

Yea I was going to turn the spherical dome and angle on the lathe and then run a 3/4" endmill around the front to create the tabs. I was curious if you guys had any better "faster" methods because surfacing with endmills is out of my relm. I am used to rotating c axis to punch holes and thats it for the most part. Thank you for taking a look at it

It has +-2.4" but it is a wedge design so im guessing at that dia. I might only have +-1.9"

here it is TOILETBOWL.MCX-6

How do i attach a MCX file?

I was wondering how some of you might go about machining this part? I have MCX6 mill and lathe level 1 for both. The machine we would be doing it on would be a mori NL-3000Y 7.5 hp live tool spindle with Y axis. I have it partially drawn up so I attached the file. The material is mild steel part is 14.0" dia. Thanks, Steve Oliver

Does the tip angle of your pilot drill match the angle on the gun drill? and is your run out looking good?

Did you look under machine definition/control definition/arcs/mill and make sure all planes were supported?

Hmm, I can look into it. Im not a big mill guy so how would you recommend checking for backlash when we are just boring straight down in "z"? Would you just check it like normal by taking an indicator and seeing if the movement is consistant with the machine vs indicator in both "x" and "y"? Also what role do the servos play in the equation? All I know about servos is they go off if there is too much tool pressure. Thanks for the response

We are currently boring some holes in a dogbone style link that has a center to center dimension of 22.0" in hardox 400 material. The material is burned out with a plasma cutter and has 4 bosses (2 on each end of the plate). The over all thickness including bosses is 3.25" and the plate is 3/4" thick. We have the link setup on 2 blocks which we clamp down on top of and use an indicator to insure the plate isnt bending. The bore dimension is 2.366" - 2.370" we go through it first with a 2.0" metcut indexable drill then bore it out to 2.2" with an adjustable boring bar then out to 2.353" with another adjustable boring bar and then come in with a finish boring bar taking 0.015" overall. When we pull the part off the machine and measure it, it has a 0.03" difference from one side to the other so the bore centerlines arent parallel to each other. If we just drill the part and take it off the machine the drilled holes run parallel to each other. We are machining these parts on a 50 taper toyoda vertical mill. We are running the roughing at 200 sfm and 0.003" ipr the finish is running at 310 sfm and 0.003" ipr. Does anyone have any ideas to why these bores could be out of line so badly. I apperciate any input, thanks in advance

When I get files from the engineers I have them save it as a x_b file and then I am able to open the solid in mc. Also what versions are you trying to do this with?

I just use a standard drill for sae ports and change the dia. to the reamer size then the shank dia. to the size that does the c'bore and the appropriate flute length. its worked out really good and verifies correctly.

You can try changing rotary axis to "c" axis

Yea I know what you mean. I just have to track the file back to where it is saved sometimes and open it from there.

I have a inconsistant problem with when I go to post the new file in mc, it wont open in the editor unless it is completely closed down. But with some of my machine groups it works just fine. Is there anyway to fix this? or is this normal

Excuse my interuption. We are actually dealing with indexing positions on our mori nl as we speak. It has the mapps 4 control on it. We normally just use G55 workoffset for indexing position in z. But I see you use a variable. Where would we find this variable and do you just put the machine coordinate in there? Thanks, Steve

I dont have experience w/ 8.1 but could it be when you chain the geometry choose line and turn cutter comp off?

I dont have experience w/ 8.1 but could it be when you chain the geometry choose line and turn cutter comp off?

I always just use a normal tap for verification and edit the tool parameters to a npt tap.

Yea we didnt adjust it much at all. I think the main thing was to get the adjustment timing down just right. We use a sub program so we can kick down the feeds and speeds for the changing diameters on the tool, it just took sometime to get it dialed in. When I asked the manufacture what they recommended they just gave me one straight rpm and a chip load and it seemed way to fast for our application. Thanks again for all the help

Yea definely this forum has been a great learning tool for me. Just a quick update we have been adjusting our change in speeds and feeds in our sub program and it looks like we are getting a decent finish now.

The part has a I.D. bore through it that is drilled and roughed from the first op. The porting is done on the 2nd op. That was a pretty good idea but the port comes through the outside of the part into some I.D. oil grooves. I would be afraid of the interupted cut with the groove tool. We didnt try turning up the thrust on the tailstock, that may have helped. The part is 6.75" long and we have a jaw depth of 1.125". Thank you for throwing these ideas out there, im new to programming and havent been in the industry very long so every bit of advice helps tremendously.