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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).Quote:
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.
After playing with morse taper for almost 4 years some intrusive thoughts appeared...
What I mean? Look at this:
Attachment 48865
I'm able to buy matching cast iron cyliner for like 20 USD.
I wanted to rebuild mill head anyway (post #87 https://www.homemadetools.net/forum/...9-9#post244241).
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.Quote:
Originally Posted by 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.
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.Quote:
Originally Posted by SteelCraft
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.Quote:
Originally Posted by tonyfoale
Subjects for nearest future are power feeds and coolant system.
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.
https://www.youtube.com/watch?v=-QXOlmZhLZE
I also installed LC filter between VFD and motor - high frequency noise from motor windings is gone :)
Attachment 49019
There were also improvements in power feed controls. Details will be shown in next video.
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.Quote:
Originally Posted by SteelCraft
https://mach-1.com/
If you search Google patents for "inventor:(Marc H. Boisvert)" it will throw up all the patents describing the system.
You might be interested in this post https://www.homemadetools.net/forum/...010#post137780Quote:
Originally Posted by 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.
Attachment 49068
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)
Attachment 49069
Do you have any ideas what can be wrong?
I think too small VFD would throw overcurrent errors even without filter.
