Milling machine - video

[SteelCraft]

The "not as beefy as dovetails" issue was in my mind when I modified the lathe but it has turned out to be a non-issue. I can take hefty interrupted cuts just as much as I could with dovetails.

I made a test cut in mild steel with BAP400R 50mm face mill going full width and 3 [mm] deep and whole knee - saddle - table assembly didn't complain. Normally I'm not going to push it hard. I prefer light climb milling cuts with high rpm and rapid feed (for carbide tooling).

[SteelCraft]

After playing with morse taper for almost 4 years some intrusive thoughts appeared...

What I mean? Look at this:



I'm able to buy matching cast iron cyliner for like 20 USD.

I wanted to rebuild mill head anyway (post #87 Milling machine - video).
This is what goes around my mind everyday...

[tonyfoale]

After playing with morse taper for almost 4 years some intrusive thoughts appeared...


I'm able to buy matching cast iron cyliner for like 20 USD.

I wanted to rebuild mill head anyway (post #87 Milling machine - video).
This is what goes around my mind everyday...

You can get these in one of two forms. One uses a drawbar and the other type uses the quick release system for CNC auto tool changing. The second type is a great time saver.

[SteelCraft]

Do you have any links to version with quick release system?

I thought about buying standard drawbar version and then modify electric impact wrench for power drawbar system.

[tonyfoale]

Do you have any links to version with quick release system?

I thought about buying standard drawbar version and then modify electric impact wrench for power drawbar system.

I am traveling right now and it is a bit difficult to access my stuff. I'll be home in two weeks if you can wait that long.

[SteelCraft]

I am traveling right now and it is a bit difficult to access my stuff. I'll be home in two weeks if you can wait that long.

Sure I will wait, I don't know yet when I will start building new milling head. I want to just collect as much data as possible, then make a 3D model, all technical drawings etc.

Subjects for nearest future are power feeds and coolant system.

[SteelCraft]

I conducted experiment with drawbar and impact wrench. It works surprisingly well. So decision is simple - I stay with current spindle nad I'm going to rebuild machine head according to original plan. Of course for power drawbar system I would buy much smaller impact wrench - the one from video is overkill for this task.

I also installed LC filter between VFD and motor - high frequency noise from motor windings is gone



There were also improvements in power feed controls. Details will be shown in next video.

[tonyfoale]

Sure I will wait, I don't know yet when I will start building new milling head. I want to just collect as much data as possible, then make a 3D model, all technical drawings etc.

Subjects for nearest future are power feeds and coolant system.

I am back from my travels and I managed to find the very clever system that I mentioned which is incredibly easy to use. Unfortunately for me, it is designed for a manually operated quill and my mill is CNC. It is designed for R8 spindles but I think that it could be applied to a morse taper. If you dig deep in the web site you will find enough detail to be able to reproduce the system.
https://mach-1.com/

If you search Google patents for "inventorMarc H. Boisvert)" it will throw up all the patents describing the system.

[tonyfoale]

I also installed LC filter between VFD and motor - high frequency noise from motor windings is gone

You might be interested in this post Stuff about VFDs and motors

[SteelCraft]

I used my mill for couple days and there is a problem with motor-filter-vfd setup.

My vfd throws overcurrent error when I'm pushing hard on the motor (big drill for example) or when I set carrier frequency below 8 khz - during acceleration/deceleration. It never happened before installing the filter.

Motor is 3 phase 1,5kW, 380V, 1420 rpm, 3,4Amps (parameters from motor nameplate). VFD is for 1,5kw motor, and it can take 3,8 Amps. Filter is rated for 5 Amps.



I connected wires from VFD to UVW input on filter, ABC output goes as phase wires to motor and N is connected to this plate (marked in red circle)


Do you have any ideas what can be wrong?

I think too small VFD would throw overcurrent errors even without filter.