Getting a New PM-1054 Going

[erikmannie]

Now I just noticed that I am cutting this angle at 49°, while I wanted 41°. Something to think about while I am at work today.

I think I figured it out. I need to *lay the 1”plate down on parallels*, and cut from the top.

 

[erikmannie]

It looks like I am going to need to get rid of the chips while it is cutting:

 

[erikmannie]

Here is the surface finish after making three .010” DOC passes with the 7/8”diameter endmill at 700 RPM on 1” width plate. I didn’t have time for any spring passes.

I am not satisfied with this. If I had time, I would have dialed a .0002” to .0004” deeper DOC & done multiple spring passes at a really high RPM (about 1000) with the feed as low as the power feed could go.

 

[Just for fun]

After your crash, you should check the tram again. More than likely the crash has thrown it off again. At least it is worth checking again just to be on the safe side.

Tim

 

[Just for fun]

Other than the crash. It's looking good. Nice to see you are making chips.

 

[erikmannie]

Here are some pictures from today’s fun. My RPM is 1200. Max DOC is .130”. Slow power feed.

This is a 2” indexable shell mill by Glacern. I am putting both of the plates in there together so that they have equal dimensions.

 

[erikmannie]

I turned the RPM down to 800 RPM for this face milling operation because the chips were coming out blue at 1200 RPM. The DOC is .125”.

 

[erikmannie]

I turned the RPM down to 800 RPM for this face milling operation because the chips were coming out blue at 1200 RPM. The DOC is .125”.

 

[erikmannie]

Here we are bringing the plates to the same thickness, hopefully with an acceptable finish. I added dark screw cutting oil because the chips were half blue and half straw-colored.

This DOC is .035”. The RPM is 800. The y-axis powerfeed is almost as slow as you can set it.

 

[erikmannie]

One huge problem that I’m having with the milling machine is that it is vibrating. I had to hurry the set up for the mounting feet because the rigging crew was here, and their hourly rate is very expensive.

As it is now, there is 3000 pounds sitting on four 1/2” Grade 8 washers. Under each washer is a nut which is used for leveling.

I can see that I am going to need to bought the knee mill to the concrete.

This is what I am blaming for the chatter. With small cuts, it doesn’t vibrate. In the cut below (.035” face milling), vibration is noticeable.