Re: Grounded Experimental Delta Printer November 27, 2013 12:34PM |
Admin Registered: 14 years ago Posts: 730 |
Re: Grounded Experimental Delta Printer November 27, 2013 04:22PM |
Registered: 11 years ago Posts: 10 |
Re: Grounded Experimental Delta Printer November 27, 2013 05:13PM |
Registered: 11 years ago Posts: 979 |
Re: Grounded Experimental Delta Printer November 27, 2013 06:21PM |
Registered: 13 years ago Posts: 24 |
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sgraber
FYI here's the number of parts to print: [dl.dropboxusercontent.com]
I'm going to slice them tonight and report back on filament amounts and time to print like I did before with Wally.
Re: Grounded Experimental Delta Printer November 27, 2013 06:25PM |
Registered: 11 years ago Posts: 979 |
Re: Grounded Experimental Delta Printer November 27, 2013 07:09PM |
Registered: 11 years ago Posts: 31 |
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Guizmo
Didn't you have interference problems with the center of the herringbones? Once you told me to make a channel there instead.
I don't understand this answer--isn't there a tolerance issue with the center of each herringbone? We're not talking about the tooth offset issue here, but mechanical tolerances in the sharp corners, right?Quote
nicholas.seward
@Guizmo: You only need a split between the two sides if you are going to use the same arm blank for both sides. The gears are off by 1/2 a tooth from side to side but there is a 10mm gap.
Re: Grounded Experimental Delta Printer November 27, 2013 07:55PM |
Registered: 11 years ago Posts: 1,381 |
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MattMoses
Nicholas, would you consider setting up ConceptFORGE's Github Repository on Bountysource?
If this is something you want to do, it is really easy to set up. You can log in to Bountysource with your Github account, then go to Tools. Bountysource automatically lists your GitHub projects, and you can click on the ones you want to configure.
Open bounties could be announced and followed on the new RepRap Bounties forum.
Of course, if this isn't something you want to do, that is totally cool too!
Re: Grounded Experimental Delta Printer November 27, 2013 08:41PM |
Registered: 12 years ago Posts: 48 |
Re: Grounded Experimental Delta Printer November 27, 2013 10:12PM |
Admin Registered: 14 years ago Posts: 730 |
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A2
I don't understand what you are suggesting, or what this provides, can you explain?
Re: Grounded Experimental Delta Printer November 27, 2013 10:55PM |
Registered: 11 years ago Posts: 1,381 |
Re: Grounded Experimental Delta Printer November 28, 2013 02:32AM |
Registered: 11 years ago Posts: 979 |
Re: Grounded Experimental Delta Printer November 28, 2013 10:19AM |
Registered: 11 years ago Posts: 145 |
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DaveGadgeteer
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Guizmo
Didn't you have interference problems with the center of the herringbones? Once you told me to make a channel there instead.I don't understand this answer--isn't there a tolerance issue with the center of each herringbone? We're not talking about the tooth offset issue here, but mechanical tolerances in the sharp corners, right?Quote
nicholas.seward
@Guizmo: You only need a split between the two sides if you are going to use the same arm blank for both sides. The gears are off by 1/2 a tooth from side to side but there is a 10mm gap.
Re: Grounded Experimental Delta Printer November 28, 2013 10:45AM |
Registered: 11 years ago Posts: 979 |
Re: Grounded Experimental Delta Printer November 28, 2013 02:52PM |
Registered: 11 years ago Posts: 14 |
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nicholas.seward
I put the part in an oven on low. I take it out every minute and hit it against a hard surface. When the tap turns to a thud you are ready to insert the bearings. I have heard reports that you can do this also by heating a bearing with a hot plate or heating the part with boiling water.
Re: Grounded Experimental Delta Printer November 28, 2013 03:06PM |
Registered: 12 years ago Posts: 48 |
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Ralphxyz
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nicholas.seward
I put the part in an oven on low. I take it out every minute and hit it against a hard surface. When the tap turns to a thud you are ready to insert the bearings. I have heard reports that you can do this also by heating a bearing with a hot plate or heating the part with boiling water.
Heating the part until you get a thud I can understand but but "expanding" the the bearing by heating it does not make sense.
Ralph
Re: Grounded Experimental Delta Printer November 28, 2013 03:46PM |
Registered: 11 years ago Posts: 145 |
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nicholas.seward
@Guizmo: As you have it drawn the groove is not needed. You only need a split if there is a discontinuity in the teeth. To be clear, you need a discontinuity on the arms so you don't have to make two arm blanks. That isn't a requirement but it makes it easier to not mess up on the registration.
Re: Grounded Experimental Delta Printer November 28, 2013 07:35PM |
Registered: 11 years ago Posts: 31 |
Re: Grounded Experimental Delta Printer November 28, 2013 11:43PM |
Registered: 11 years ago Posts: 58 |
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sgraber
What is meant is you warm the bearing to the point that when you insert it into the bearing hole that it melts the plastic a bit so it slides into the hole.
Re: Grounded Experimental Delta Printer November 29, 2013 12:28PM |
Admin Registered: 14 years ago Posts: 730 |
It's no sillier than selling a product, or starting a crowdfunding campaign. And I think everyone is in agreement that those things are not silly at all. But of course it is totally up to you. Considering the level of interest in your projects, you probably wouldn't have to worry about setting up your own bounties.Quote
nicholas.seward
@MattMoses: I feel silly setting up my own bounties.
Re: Grounded Experimental Delta Printer November 29, 2013 12:53PM |
Registered: 12 years ago Posts: 1,049 |
Re: Grounded Experimental Delta Printer November 29, 2013 12:57PM |
Registered: 11 years ago Posts: 18 |
Re: Grounded Experimental Delta Printer November 29, 2013 01:14PM |
Registered: 11 years ago Posts: 979 |
Re: Grounded Experimental Delta Printer November 30, 2013 07:57PM |
Registered: 10 years ago Posts: 3 |
Re: Grounded Experimental Delta Printer November 30, 2013 08:35PM |
Registered: 11 years ago Posts: 979 |
Re: Grounded Experimental Delta Printer December 01, 2013 06:23AM |
Registered: 11 years ago Posts: 10 |
Not hot end; was wondering about the extruder. I see the answer in the BOM now - MBE extruder. Can't believe this thing is bearingless - has to add drag.Quote
nicholas.seward
Ubis is what I use.
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nicholas.seward
I want to eliminate that bridge. I will work to minimize it but I have to have access for the tuning peg. Even if you bridge poorly it has many layers before you get to a mechanically critical part.
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nicholas.seward
What parts are you refering to when you talk about 608 overhanges? Everything should be printable but something may have slipped by.
Re: Grounded Experimental Delta Printer December 01, 2013 11:55AM |
Registered: 13 years ago Posts: 200 |
Re: Grounded Experimental Delta Printer December 01, 2013 12:04PM |
Registered: 13 years ago Posts: 200 |
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nicholas.seward
I already have the electronics for the beta kits but all of those will be getting paired with the mechanicals so I can do some consistent beta testing. It won't be until December when I will be doing this for real.
Beta Simpson Electronics
1 - Azteeg X1 $65
4 - SureStep Drivers $10
4 - Steppers $12
1 - 12or24 Power Suppy $36
1 - 200mm Round Heating Pad $14
1 - Hot End $16
1 - Filament Drive $12
Total: $230 (my cost)
These are prices I got from ordering for 40 machines. I imagine I can do much better when I order for 1000.
Re: Grounded Experimental Delta Printer December 01, 2013 04:31PM |
Registered: 11 years ago Posts: 58 |
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brandonh
- Is there a place with a bunch of pictures of assembled Simpsons? I recall seeing ones from MF NY but I can't seem to find them now. Trying to understand the wiring process.
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brandonh
- Are any more basalt beds available? If not available pre-cut, do you have any supplier links?
- What is your preferred "1/2" Flatstock" material for the top and bottom?
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brandonh
Not hot end; was wondering about the extruder. I see the answer in the BOM now - MBE extruder. Can't believe this thing is bearingless - has to add drag.
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brandonh
I see now, the peg drops in. There's definitely room to minimize this (which I'm sure you know, but I'll list some ideas before making the mods):
Re: Grounded Experimental Delta Printer December 01, 2013 05:31PM |
Registered: 11 years ago Posts: 14 |
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owens
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sgraber
What is meant is you warm the bearing to the point that when you insert it into the bearing hole that it melts the plastic a bit so it slides into the hole.
I haven't tried that trick with bearings, though I've done it in combination with heating the plastic to get the pulleys onto the motor shafts; if the shaft isn't warm it tends to freeze the pulley in place before it's slid on far enough. And the pulleys are sensitive parts, so I don't want to overheat and distort them. I'm not sure it would work the the bearing holes though. What we found was a problem of out-of-round holes, rather than simply too small, and the plastic really needed to move in order to let the bearings fit in. One thing I did was keep an M8 bolt handy so I could run it through both bearings while the arm was still warm, to make sure they were lined up with each other. Also, I strongly recommend only trying to do one bearing at a time, and re-heating in between; you don't want to try to force them into place or the plastic will distort.
On that point, I strongly recommend trying the oven trick with a scrap piece first. You'll want to get an idea of what Nicholas means by the sound changing - it really does sound like a thud as the plastic softens, but it's also very easy to go too far and make the part too flexible. I've had success with the oven but have also done a couple of variations on his original idea. For the gear arms, I wrapped the gear section loosely in aluminum foil to try to keep it a bit cooler, leaving just the end exposed. And for for the most part I've switched to spot heating with a hairdryer rather than the oven. It helps to have a small enclosure around the part; I use a cardboard box that I could stick the end of the arm into and let the hot air swirl around it. I feel like the hairdryer gives better control, but in both cases I was able to get the bearings and bolts in place without warping the arms (as far as I can tell). This was all on the original GUS; we're still printing the new arms, so haven't tried putting any bearings in yet. . .
Bill.
Re: Grounded Experimental Delta Printer December 01, 2013 10:34PM |
Registered: 11 years ago Posts: 979 |