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Weiss VM32 CNC Conversion

In preparation for this CNC adventure I subscribed to NCYCNC Proven Cut service which provides a whole range of proven F&S for specific operations on a range of machines and materials.
Here's the 'recipe' for drilling into 4140 steel on a Tormach 440 with a #18 drill.

1743459270636.png

In prepration
 
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In preparation for this CNC adventure I subscribed to NCYCNC Proven Cut service which provides a whole range of proven F&S for specific operations on a range of machines and materials.
Here's the 'recipe' for drilling into 4140 steel on a Tormach 440 with a #18 drill.

View attachment 62516
In prepration
Nice. Provides interesting information. I have the Machinist Workshop tool which I think came gratis with CAM software. Don't remember. Doesn't give nearly as much as your chart like the pecking depth. Not sure if the steel is even the same.
1743460689355.png


Notice how much faster the RPM and feed is.
MATERIAL= Alloy Steel 4140 - Resulfurized (375-425 HB)
SURFACE SPEED= 98 FPM
DRILL MATERIAL= CARBIDE
DRILL DIAMETER= 0.1695 inches 4.305 mm
LOAD PER FLUTE= 0.002875 inches
NUMBER OF FLUTES= 2
SPINDLE SPEED= 2208 RPM
FEEDRATE= 12.696 IPM 322.4784 mmPM
MATERIAL REMOVAL RATE= 0.28648 in³/min
MATERIAL POWER CONSTANT= 0.91
REQUIRED HORSEPOWER= 0.3067
 
In preparation for this CNC adventure I subscribed to NCYCNC Proven Cut service which provides a whole range of proven F&S for specific operations on a range of machines and materials.
Here's the 'recipe' for drilling into 4140 steel on a Tormach 440 with a #18 drill.

View attachment 62516
In prepration
Thats a carbide drill - you'll want to check what a HSS drill does (unless you have a carbide drill?)
 
I want to retire someday so no carbide drills here.
Here's a generic HSS 1/4" drill.
This kind of blows me away.
1900 rpm
2mm peck depth
1743461943195.png
 
the rpm and sfm were much lower on the carbide? whats up with that? something is off with the calcs. And the feed per rev tripled going to HSS? can you do a 1:1 comparison only changing the tool and not the machine or any other parameter? Its not April 1 so stop messing with me - save it for tomorrow :p
 
the rpm and sfm were much lower on the carbide? whats up with that? something is off with the calcs. And the feed per rev tripled going to HSS? can you do a 1:1 comparison only changing the tool and not the machine or any other parameter? Its not April 1 so stop messing with me - save it for tomorrow :p
The carbide was on a 440, the HSS on a 770. Maybe that's it?
 
I'll freely admit that I was cringing drilling with the 1/4" drill. I think it drilled through 12mm of steel in four pecks which was waaaay aggressive for me.
 
My experience with Provencut was a waste of time. They use brand name tools at production speeds. Doesn't translate well.
What’s interesting to me is that the F&S tend to be pretty much exactly what Fusion autofills when you pick one of the library tools.
 
What’s interesting to me is that the F&S tend to be pretty much exactly what Fusion autofills when you pick one of the library tools.
Which is what you'd expect from a production machine which is to Gerrit's point. Doesn't translate well to a small light duty machine that lacks the rigidity that usually comes with 4000kg of machine.

For giggles I tried the Tormach PathPilot hub. You need to pick your own peck depth. With a 1/4" drill, keeping 2.03mm peck depth (which I don't think affects the feed rate) I get Z feed rate of 53.3mm/min @ 940 rpm. 18.8 SMM chip load of 0.028 per tooth.

So basically half the speed you had calculated. Definitely less cringe worthy.

1743473156737.png
 
Which is what you'd expect from a production machine which is to Gerrit's point. Doesn't translate well to a small light duty machine that lacks the rigidity that usually comes with 4000kg of machine.

For giggles I tried the Tormach PathPilot hub. You need to pick your own peck depth. With a 1/4" drill, keeping 2.03mm peck depth (which I don't think affects the feed rate) I get Z feed rate of 53.3mm/min @ 940 rpm. 18.8 SMM chip load of 0.028 per tooth.

So basically half the speed you had calculated. Definitely less cringe worthy.

View attachment 62528
I had a terrible experience trying to use that application. So laggy that it was basically unusable. I'll give it another whirl.
 
Masso is a good choice as well of course. I chose PathPilot because it was the least expensive route for me. I did try linuxcnc for a few days but never got anything working that I wanted to use.
I’m definitely hooked :)
Yesterday I needed 2 14.2 mm pockets for 14mm magnets, conversational had me finished in 10 minutes start to finish. The more you use it the better it gets.
 
Masso is a good choice as well of course. I chose PathPilot because it was the least expensive route for me. I did try linuxcnc for a few days but never got anything working that I wanted to use.

Yesterday I needed 2 14.2 mm pockets for 14mm magnets, conversational had me finished in 10 minutes start to finish. The more you use it the better it gets.
You have sort of raised a question for me though.
I use UCCNC on my CNC router and I don't love it as the software is very non-intuitive. I could see moving the Masso to the CNC router and using Pathpilot on the CNC mill.
I'm curious about what's required to use Pathpilot.
 
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