• Scam Alert. Members are reminded to NOT send money to buy anything. Don't buy things remote and have it shipped - go get it yourself, pay in person, and take your equipment with you. Scammers have burned people on this forum. Urgency, secrecy, excuses, selling for friend, newish members, FUD, are RED FLAGS. A video conference call is not adequate assurance. Face to face interactions are required. Please report suspicions to the forum admins. Stay Safe - anyone can get scammed.
  • Several Regions have held meetups already, but others are being planned or are evaluating the interest. The Ontario GTA West area meetup is planned for Saturday April 26th at Greasemonkeys shop in Aylmer Ontario. If you are interested and haven’t signed up yet, click here! Arbutus has also explored interest in a Fraser Valley meetup but it seems members either missed his thread or had other plans. Let him know if you are interested in a meetup later in the year by posting here! Slowpoke is trying to pull together an Ottawa area meetup later this summer. No date has been selected yet, so let him know if you are interested here! We are not aware of any other meetups being planned this year. If you are interested in doing something in your area, let everyone know and make it happen! Meetups are a great way to make new machining friends and get hands on help in your area. Don’t be shy, sign up and come, or plan your own meetup!

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
 
Last edited:
David said:
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
Click to expand...
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
 
David said:
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
Click to expand...
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
 
Mike R said:
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
Click to expand...
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.
 
gerritv said:
My experience with Provencut was a waste of time. They use brand name tools at production speeds. Doesn't translate well.
Click to expand...
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.
 
David said:
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.
Click to expand...
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
 
Mike R said:
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
Click to expand...
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 :)
Click to expand...
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.
 
gerritv said:
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.
Click to expand...
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.
 
You must log in or register to reply here.
Back
Top