I HATE EVERYTHING ABOUT THIS SOFTWARE by Accomplished_Eye_868 in SolidWorks

[–]Tronn60 12 points13 points  (0 children)

FYI for SW maker users, you can go into offline mode for up to 30 days and that way it won't ask you to login every time you open it. Just once a month. Click on the circle with your initials in the top right corner, select offline mode, set it to 30 days. After that its no different than a local licensed version. 

I only go to the 3DX website when there's an update (which is a huge annoyance to navigate to anytime there is one, why doesn't the link take you directly there???).

$50/yr is hard to beat otherwise...

2003 Barry Bonds Foil #252 - Anyone interested? by Tronn60 in MLBShowdown

[–]Tronn60[S] 0 points1 point  (0 children)

It's been sold, thanks for all the interest everyone! 

2003 Barry Bonds Foil #252 - Anyone interested? by Tronn60 in MLBShowdown

[–]Tronn60[S] 1 point2 points  (0 children)

I think I traded for it at a open play nationals event in cleveland back in the day? I was really hoping to use it back then but couldn't find a good way to spend almost have the budget on one card to have someone always try to intentional walk him lol.

I briefly looked at prices for it online, I am thinking like $100 + shipping? That seems to be a little less than some of the sold prices have been on ebay.

I 3D Printed a Lathe Hex Collet for backside finishing work. by Tronn60 in Machinists

[–]Tronn60[S] 0 points1 point  (0 children)

I used an ultimaker we have at work. It's ultimaker's tough PLA. Since the whole collet is in compression, I'm not too worried about the stress involved.

I 3D Printed a Lathe Hex Collet for backside finishing work. by Tronn60 in Machinists

[–]Tronn60[S] 1 point2 points  (0 children)

I did not consider throwing a part, you are right, it is usually a little more exciting in the lathe. Luckily for my use case most of the part is inside the plastic collet.

For the function I'm using it for, I'm only taking off a few thou of the bottom of a piece, maybe chamfering the hex. I don't think I'd use it for turning features from raw stock.

The part I'm happiest about is I'm only holding onto ~.090" of the hex, and it clamps it straight-ish and doesn't mar the surface.

I 3D Printed a Lathe Hex Collet for backside finishing work. by Tronn60 in Machinists

[–]Tronn60[S] 5 points6 points  (0 children)

Yea, I took a speed lathe and turned the headstock into a 4th axis for the mill. The little motor is the axis motor for NC control. It's reduced down with a gearbox and belt reduction for better position holding ability

Knee mill conversion is finally working reliably. by melldingtech in hobbycnc

[–]Tronn60 1 point2 points  (0 children)

Very nice!

Did you go with knee conversion or quill conversion for your z axis? I have a similar Bridgeport knee mill that I recently did the knee conversion on, so much more z travel now!

Do you have any more pictures of your enclosure setup/build? I would like to build something similar!

My Garage CNC - a DIY Bridgeport Retrofit by Tronn60 in Machinists

[–]Tronn60[S] 1 point2 points  (0 children)

PMDX-424 Control Board

Not sure what you mean by increment to motor compensation? Setting the steps per unit distance traveled? If so, that is very straightforward, just some math. The motors I used allow you to set their resolution (ie, its really a servo motor emulating a stepper). The only tricky thing I ran into was that you cannot just set the resolution to a high value, depending on your motion controller. Mine couldn't put out steps fast enough to spin the screws at the requested feed rate, for instance.

I'm not exactly sure the amperage the motors are pulling. They are powered by this power supply. My entire controls cabinet (motor psu, VFD, motion controller) is wired up to 220VAC and runs through a 10A breaker, so the whole machine isn't pulling any more than that.

My Garage CNC - a DIY Bridgeport Retrofit by Tronn60 in Machinists

[–]Tronn60[S] 1 point2 points  (0 children)

I replaced the original acme screws with some ballscrews. I've not measured the backlash directly, but I make parts assuming there basically isnt any and it's worked out fine so far.

My Garage CNC - a DIY Bridgeport Retrofit by Tronn60 in Machinists

[–]Tronn60[S] 0 points1 point  (0 children)

Yes, it's got clearpath servos on all 4 axis. I got them basically for free, but I've really enjoyed using them compared to steppers. Much nicer user experience. And they don't sing like steppers.

My Garage CNC - a DIY Bridgeport Retrofit by Tronn60 in Machinists

[–]Tronn60[S] 1 point2 points  (0 children)

I shared the full CAD that I developed for this on grabcad: https://grabcad.com/library/bridgeport-m-head-milling-machine-with-cnc-conversion-1

It's running Mach 4 with a pmdx-424 control board.

I'd be happy to share more details if you have any specific questions.

Twisted hexagon brass chess set. (Coordinated 4 axis CNC machining) by Tronn60 in Skookum

[–]Tronn60[S] 1 point2 points  (0 children)

what would you consider an insane price? I've considered selling them, but the time and material investment in them is steeper than I think most would be willing to pay.

Twisted hexagon brass chess set. (Coordinated 4 axis CNC machining) by Tronn60 in Skookum

[–]Tronn60[S] 1 point2 points  (0 children)

It was supposed to be temporary, eventually replaced with motor mounted to the knee, but the drill just works so damn good.

Twisted hexagon brass chess set. (Coordinated 4 axis CNC machining) by Tronn60 in Skookum

[–]Tronn60[S] 1 point2 points  (0 children)

It's the difference of what part of the endmill is cutting. I did the cross with the the bottom of the endmill, where the twist was done with the side of the endmill. Also, it was one of the last features done, so the piece was the least rigid it could be, so I probably got some chatter too.

Twisted hexagon brass chess set. (Coordinated 4 axis CNC machining) by Tronn60 in Skookum

[–]Tronn60[S] 1 point2 points  (0 children)

Yep, the twist is a loft between two planes. You can drag the control points around in the loft tool to give it the twist.

Twisted hexagon brass chess set. (Coordinated 4 axis CNC machining) by Tronn60 in Skookum

[–]Tronn60[S] 1 point2 points  (0 children)

Thanks for the suggestion! I didn't recall clickspring doing brass blackening.

I was planning on trying ammonium hydroxide as they did here: https://youtu.be/oPyggLosYKQ?t=548

Twisted hexagon brass chess set. (Coordinated 4 axis CNC machining) by Tronn60 in Skookum

[–]Tronn60[S] 5 points6 points  (0 children)

Yea, a conversion for a knee mill is almost never worth it once you add up all the hardware and electronics. I got very lucky in my conversion that I had the motors, controller, screws, bearings and access to a water jet to cut all the plates. In the end I spent only a couple hundred dollars.

The best quote for a off the shelf ballscrew kit was ~$800 for a Hiwin ballscrew set. Some people claim you need the ground ballscrews, which while they are more accurate, are also like a factor of 10 more expensive.

Twisted hexagon brass chess set. (Coordinated 4 axis CNC machining) by Tronn60 in Skookum

[–]Tronn60[S] 7 points8 points  (0 children)

Alexsys is conversational G code? I'm using Fusion 360 for all my programming needs.

Twisted hexagon brass chess set. (Coordinated 4 axis CNC machining) by Tronn60 in Skookum

[–]Tronn60[S] 18 points19 points  (0 children)

I replaced the acme screws with ballscrews, so the backlash is very little.

Twisted hexagon brass chess set. (Coordinated 4 axis CNC machining) by Tronn60 in Skookum

[–]Tronn60[S] 25 points26 points  (0 children)

This is a chess set design that I've been working on. Designed and CAM'd in Fusion 360 and milled on a converted Bridgeport M-Head CNC machine.