Author Topic: This is the rest of my printed parts.  (Read 4156 times)

Offline Bioethical

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This is the rest of my printed parts.
« on: October 11, 2015, 12:48:29 AM »
I'm sorry had to open another thread but couldn't include all of my printed parts in the previous one. I hope that all of them fit well. Your suggestions about how to start up the assembling with the minimum of mistakes will be greatly appreciated. Thank you.

Offline Bioethical

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Re: This is the rest of my printed parts.
« Reply #1 on: October 11, 2015, 02:32:01 AM »
Could somebody tell me what is the total length of the T8*8  8mm lead screw with nut?  What would be a best recommended  less pitch?

Offline CdRsKuLL

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Re: This is the rest of my printed parts.
« Reply #2 on: October 11, 2015, 11:57:46 AM »
Hi, I think the current thread pitch it 2mm but 4 start so it travels 8mm on one turn. (Think that's right) I would try and go for half that ideally. So something like a t8*4 but I couldn't find one. The main problem is when the legs are down they tend to creep up if on a smooth surface under its own wait if the servo isn't powered. However if you try and hold the servo you tend to burn it out.. Lol I'm on my third servo now. When the legs are up in flying mode it's fine. If your photos are to big to post them all on a single post just reply to yourself with the others. :-)
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Offline Bioethical

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Re: This is the rest of my printed parts.
« Reply #3 on: October 11, 2015, 04:19:13 PM »
Steve, Thank you very much for your answer. I'm kind of doubtful here:  I know for a fact that a Std pitch M5 rod travels 0.8 mm per rotation (that's the pitch of my printer Z axis). By other hand, I have info that M8 rod travels 1.25 mm per rotation (according to Triffid hunter's guide). According to your info , something less than a M5 pitch would be ideal (I may be misunderstood, your insight would be very important).
By other hand, what is the total length or size of the rod? I'm pretty sure that I'd need to cut it if I buy it online.
 
« Last Edit: October 11, 2015, 07:23:02 PM by Bioethical »

Offline CdRsKuLL

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Re: This is the rest of my printed parts.
« Reply #4 on: October 11, 2015, 04:31:27 PM »
Hi, you're quite correct in that a standard m8 thread travels at 1.25mm per single rotation. I don't think it helps when sellers don't really post the correct information and tend to get figures mixed up. The current one I'm using is a 4 start thread with a pitch of 2mm, however since this is 4 start rather than single start like your m8 then this travels 8mm on a single rotation. So it only has to rotate 4 times to move 32mm where a standard m8 would need to rotate just over 25 times. Some sellers class this as a t8x8 others a t8x4. But both are the same. I think ideally something that on a single rotation moves 4mm would work the best as you would get the transforming speed but also a bit more resistance as the pitch wouldn't allow the nut to move as much.   It's a hard one to try and explain so sorry I'm not the best at putting things into words
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Offline Bioethical

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Re: This is the rest of my printed parts.
« Reply #5 on: October 11, 2015, 08:04:34 PM »
Has anybody here tried the bronze nut with graphite lubricant so the legs elevator don't get stuck with the weight of the flying machine?

Ok, I hope I got it now. So I should buy the M5 rod or other rod with a pitch of 0.8 mm per turn because this is closer 0.4 mm per turn which you think of it as the ideal rotation,  in other words you'd prefer the legs movement slower but smoother, right?

I still have this other question: what is the length of the rod installed inside the drone, I mean the size I need to cut it with my saw.
« Last Edit: October 11, 2015, 08:08:16 PM by Bioethical »

Offline CdRsKuLL

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Re: This is the rest of my printed parts.
« Reply #6 on: October 11, 2015, 08:08:51 PM »
NO..  Not 0.4mm but 4mm , one rotation would move the nut 4mm, the current one in the list moves it 8mm which I think it too much.. I didn't measure the length as it all depends on how far you insert it into the coupler. I just pushed mine in/marked and cut it so sorry I don't know.

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Offline Bioethical

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Re: This is the rest of my printed parts.
« Reply #7 on: October 11, 2015, 08:12:03 PM »
I put my blue parts here and deleted the other post so I can have all together without taking over too much spaces.

Offline Bioethical

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Re: This is the rest of my printed parts.
« Reply #8 on: October 11, 2015, 08:25:27 PM »
I'm sorry, we are talking about the same, lol.    What happens is that in the community of Rep Rap, builders of printers, they use the 0.8mm instead of 8 millimeters because  0. is the place for centimeters, as you can see here in Triffid Hunter's guide in the section of the Z axis lead screws calculations:
http://reprap.org/wiki/Triffid_Hunter's_Calibration_Guide
« Last Edit: October 12, 2015, 10:15:26 PM by Bioethical »

Offline Bioethical

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Questions about the Carbon fiber tubes.
« Reply #9 on: October 14, 2015, 02:52:54 AM »
Since the carbon fiver tubes come in 500mm sizes, I don know how to cut them. Can I use a normal tubing saw or is there something special for it?

Offline CdRsKuLL

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Re: This is the rest of my printed parts.
« Reply #10 on: October 14, 2015, 06:47:23 AM »
I just used a hacksaw, nothing different really than cutting a plastic tube, :-)
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Offline Bioethical

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I've Just cutted my tubes.
« Reply #11 on: October 24, 2015, 11:11:49 PM »
What a thrill!  I don't know what to do next, lol.

Offline Bioethical

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Why the M3 Bars are so large?
« Reply #12 on: October 26, 2015, 04:22:02 AM »
I'm in the process of assembling, but can not advance until receiving the four M3 threaded bars. I've been trying to figure out why the four of them are 170mm length. The seller in UK cut them for me, but it seems that I'm going to have to cut them again since they seem not to fit, at least in the pictures that I've seen. Can anybody tell me what the idea of 170mm length is?

Offline Tommy

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Re: This is the rest of my printed parts.
« Reply #13 on: November 08, 2015, 06:05:20 PM »
What is your question?
(Threaded rods have already been discussed in other thread with pics)

Offline Bioethical

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Re: This is the rest of my printed parts.
« Reply #14 on: November 24, 2015, 02:58:23 AM »
These ones hadn't been published yet. I made them with 0.2 layer height. filament 1.75mm