Delta RepRap using both belts and Spectra fishing line

I have this new RepRap 3D printer that I am putting together. It is based on the Rostock style printer. It came to me half assembled, sans electronics. It had been running, but got pirated for parts to make another Prusa.

It has this awesome, expanding, laser cut acrylic case. But the case was set up to only go ‘normal’ Rostock height based on the length of the belts. There is a lot more room on the smooth rods for it to get taller. I just need to make a belt stretcher (I am too cheap to buy longer belts).

I just so happen to have just the thing. I have some fishing line I picked up on clearance a few years ago – $6. It just so happens to be the 65lb Spectra line that people are using to string up their Kossels.

So I decided to do both. Belts for the drive and line for the ‘idler’ side. I also wanted to include the zip-tie tensioner concept I’d seen.

tools and parts to make copper bushings
Making some little copper rings so the line doesn’t cut my belts. I just nipped off a bit of tube left over from my water-cooling experiment and deburred them.
rostock reprap carrage wtih both belts and Spectra fishing line
Here you can see my belt to carriage connection and also the belt to line connection.
rostock reprap with the carriage to the top of the tower.
The fishing line goes over the top pully. I looped mine a couple of times, giving me a total of 4 strands. 260lbs tensile should reduce the stretch and bouncing other people are seeing with just a single line. The Z endstop provides enough gap to allow for the connection.

It turns out, that doing this, you need a belt as long as your smooth rods. Conversely  you can make your smooth rods as long as your belt.

rostock carriage all the way down.
I can drop the carriage right to the ‘floor’ and still not interfere with the coupling.
Rostock Reprap with both belts and Spectra fishing line drive mechanism.
Two of the three towers belted or strung. I’ve not done the back tower. Each one is getting done slightly different, so I can see which I like the best.
reprap rostock zip tie belt tensioner
This shows the zip tie being used to tension the belts. Just take another click on the zip tie, and it’s tighter. I am wondering how long these things will last before they break and what kind of damage that will incur. I may try bailing wire on the next iteration.

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This begs the question. Is this a Rostock or a Kossel? (Looking at the drive, not the smooth rods vs extrusion frame). Rossel? Kostock?

I know I am naming this machine the Solar Scribbler. It will live in my garage workshop for a few reasons.

ABS stinks when printing. I don’t want print ABS in the house again…

The upright rods means that sawdust and crud won’t settle on them near as much. Also the chassis helps keep airborne crud out.

But the garage is getting a few solar panels and some deep cycle batteries installed. So the printer will run on solar power! I figure the deep cycle batteries should be able to power the heated bed to ABS temps without a problem.

My garage also sports a solar hot air panel to heat it fall through spring. The printer will get fitted to the panel to have a solar heated chamber.

So many big plans for this little printer…

Bella’s Cute of the week #4

So here is the last photo in the first half of this series. Just look at those blue eyes!

Bella & Dandelion
Bella, Dandelion & Arrow Head

If she’s not the cutest baby ever, she’s at least gotta be in the running.  One would think such an adorable baby would make the photographer’s job easy, but you need some mad skillz to crawl around ahead of the baby, backwards, directing lights,  reflectors, shade, and an unruly baby who got bored with the whole picture taking business about half an hour ago..

Blacksmith forge from gas grill and recycled bricks

I made a natural lump charcoal forge tonight out of an old gas grill. I lined it with recycled bricks. The blower is a leaf blower.

Bricks lining a burnt out gas grill to make a blacksmith forge. The holey bricks on the bottom allow air to come up.
Bricks lining a burnt out gas grill to make a blacksmith forge. The holey bricks on the bottom allow air to come up.
I put in just a little bit of natural lump charcoal to test it tonight.
I put in just a little bit of natural lump charcoal to test it tonight.
Testing the forge with a small piece of metal
Testing the forge with a small piece of metal
Turning the flash off on the camera, and you can see the warm glow of the forge fire
Turning the flash off on the camera, and you can see the warm glow of the forge fire
The forge works, it heats metal up until it glows!
The forge works, it heats metal up until it glows!
Using a leaf blower underneith pushing air up through the bricks to provide extra oxygen to the fire really heats things up!
Using a leaf blower underneith pushing air up through the bricks to provide extra oxygen to the fire really heats things up!
See, with the blower, the fire gets hotter. Look at that metal glow!
See, with the blower, the fire gets hotter. Look at that metal glow!
I am not sure how long the bricks will last - they are glowing brightly as well.
I am not sure how long the bricks will last - they are glowing brightly as well.
I only tried banging on the metal with a hammer for 3 heatings.
I only tried banging on the metal with a hammer for 3 heatings.

Thus begins my journey into the world of blacksmithing. Yet another hobby for me!

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