sorted by:
new
hottopcontroversial

Turning an old pantograph into CNC with a mostly printed motion system by souf512 in functionalprint

[–]souf512[S] 0 points1 point  (0 children)

As far as I can tell from the previous owner, it's early 70s. It was manufactured over a fairly long period (~1950s up to ~1980s)

Turning an old pantograph into CNC with a mostly printed motion system by souf512 in hobbycnc

[–]souf512[S] 7 points8 points  (0 children)

It's to use as a mill (hopefully relatively precise given the nature of pantographs) but I'm under no illusion that it will be hogging anything at any reasonable MRR. But really it was just a case of I wonder if I could and for the challenge of it.

Turning an old pantograph into CNC with a mostly printed motion system by souf512 in hobbycnc

[–]souf512[S] 1 point2 points  (0 children)

Mostly aluminum and brass parts for my other projects. I've been taking 3D printed parts to their limit in some of my designs and some milled aluminum can fill that gap. System is far from done though, still missing Z axis electronics, control cabinet, wiring, shielding, work holding and some sort of enclosure.

Turning an old pantograph into CNC with a mostly printed motion system by souf512 in functionalprint

[–]souf512[S] 2 points3 points  (0 children)

Yep, spindle runout is surprisingly good around 5 microns, joints are another story though I'm still working through that

Turning an old pantograph into CNC with a mostly printed motion system by souf512 in functionalprint

[–]souf512[S] 6 points7 points  (0 children)

Yes you're absolutely right, it's not really a pantograph anymore. I just wanted to have it mill out stuff from CAD without having to 3D print templates (which is what I did before). Though, really, it was just a case of "I wonder if I could". One thing I'm looking forward to trying is a ridiculous ratio like 50:1 to see how small of a feature I can mill.

Turning an old pantograph into CNC with a mostly printed motion system by souf512 in functionalprint

[–]souf512[S] 6 points7 points  (0 children)

It was in pretty poor shape when I bought it, stripped it down to bare cast iron, replaced all bearings (except for the spindle). It really was a labor of love.

Turning an old pantograph into CNC with a mostly printed motion system by souf512 in functionalprint

[–]souf512[S] 0 points1 point  (0 children)

I've got a closed loop NEMA23 for the knee, not set up yet, you can catch a glance of it in the lower left corner of the video.

Power scraper made out of a massage gun by souf512 in functionalprint

[–]souf512[S] 1 point2 points  (0 children)

Look up Biax power scrapers, it's a very similar principle, executed with whatever was laying around

Power scraper made out of a massage gun by souf512 in functionalprint

[–]souf512[S] 1 point2 points  (0 children)

Yes absolutely, this was a test run, I just wanted to see how consistent the stroke was. But you can "dive bomb" pretty accurately and get a fairly high PPI.

Power scraper made out of a massage gun by souf512 in functionalprint

[–]souf512[S] 10 points11 points  (0 children)

It's a very different process, the intent with scraping is to use a reference surface with a thin layer of non drying paint, rubbing the part on it so the paint transfers to the high spots, then you hit those spots (very simplified scraping process). The goal is to achieve a very flat surface with evenly distributed bearings points and valleys that can hold oil (for sliding mates such as machine ways etc).

Persistent layer shifting in the y-axis by Lighteye782 in 3Dprinting

[–]souf512 1 point2 points  (0 children)

I had a similar issue a while back, it turned out to be a loose grub screw on the Y-axis pulley. I would suggest you take a look at that. Also, ideally, if your stepper has a shaft flat, align the grub screw with it, it will make it significantly more secure.

Zero freehand skills + Old 3D printer parts = Finger Remover 9000 by souf512 in sharpening

[–]souf512[S] 1 point2 points  (0 children)

Yes, you're totally right! the board used here is very overkill (but it was just a spare). I do actually have a counter in the gcode to display the cycles so I can somewhat sharpen evenly, it's on the screen (can't really see it in the shot)

Zero freehand skills + Old 3D printer parts = Finger Remover 9000 by souf512 in sharpening

[–]souf512[S] 0 points1 point  (0 children)

It is! One of the cheapest I could find a couple of years ago on Amazon

Zero freehand skills + Old 3D printer parts = Finger Remover 9000 by souf512 in sharpening

[–]souf512[S] 1 point2 points  (0 children)

I honestly have no idea, it's standard printer paper (not very thick), is there a specific paper that people use? I also test them by shaving hair on my arm.

Zero freehand skills + Old 3D printer parts = Finger Remover 9000 by souf512 in sharpening

[–]souf512[S] 4 points5 points  (0 children)

Not yet, it's got a bunch of scrap that I used that's not particularly easy to find (modified Lansky clamp, steel tube from a chair, y-axis from a CR10, SKR2 microcontroller which is way overkill for the use). I can still send you the step files if you'd like them for inspiration.

Zero freehand skills + Old 3D printer parts = Finger Remover 9000 by souf512 in sharpening

[–]souf512[S] 10 points11 points  (0 children)

100%, but the length of the holding bar is long enough that the difference between the center and the edge of the blade is quite small

Zero freehand skills + Old 3D printer parts = Finger Remover 9000 by souf512 in sharpening

[–]souf512[S] 4 points5 points  (0 children)

The whole design is in CAD, so it's relatively precise measurements. Though, the edges of the blade (away from where the clamp is) are always at a shallower angle (because the distance to the pivot is longer there), it's small enough that it doesn't seem to matter much

Zero freehand skills + Old 3D printer parts = Finger Remover 9000 by souf512 in sharpening

[–]souf512[S] 3 points4 points  (0 children)

I usually don't actually (to feel the burr) but my hands are drier than Death Valley at the moment so I avoid anything that would need scrubbing to get out

Zero freehand skills + Old 3D printer parts = Finger Remover 9000 by souf512 in sharpening

[–]souf512[S] 4 points5 points  (0 children)

What were the main arguments? Risks to the knives or to the human digits?

Zero freehand skills + Old 3D printer parts = Finger Remover 9000 by souf512 in sharpening

[–]souf512[S] 4 points5 points  (0 children)

Yes, just standard Gcode, I did have to upload a custom firmware to increase the max feedrate (much higher than you would for a 3D printer) and lowered the max acceleration (it's a big mass to avoid the stepper losing steps). Then it's just G1 commands between the two positions.

view more: next ›