Lets Build a DIY FPV Spider Quad Together - Page 5 - RC Groups
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Oct 11, 2012, 02:23 PM
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Quote:
Originally Posted by erunway1
This is how mine finally with the LG
Turned out fantastic. I also like the DJI arm frame. Great job.
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Oct 13, 2012, 04:25 PM
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neato4u's Avatar
Quote:
Originally Posted by Nick_P
Turned out fantastic. I also like the DJI arm frame. Great job.
Don't get me wrong, the DJI arm is strong (I have tried and it went through quite a number of crashes, including hard ones and still survives)

but doesn't it induce vibrations as well?
Oct 13, 2012, 09:12 PM
Registered User
Quote:
Originally Posted by neato4u
Don't get me wrong, the DJI arm is strong (I have tried and it went through quite a number of crashes, including hard ones and still survives)

but doesn't it induce vibrations as well?
Not sure what this has to do with the frame; however, I have experienced vibes using stock DJI arms. Clone DJI arms seem to have less of an issue with vibrations.

That said the frame design looks great.
Oct 26, 2012, 11:32 PM
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hey nick this is a great design that you made.do you have a dxf file for this frame that would be great also if you need anything cut i have a cnc router i built let me know thanks rob
Oct 27, 2012, 11:59 AM
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FPV Spider Quad DXF files


Here ya go. I converted the .ai files I uploaded previously to .dxf format. (See post #28) They shouldn't need any cleanup I wouldn't think.
Nov 02, 2012, 08:37 PM
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Great thread, gives all the info needed - but being a noob I need a little help

I haven't gone through all the videos yet, the thread was enough to spur me into "going for it" so thorough in information and videos so I can see exactly what needs to be done.

I'm an avid diy'er i'm going to try to get some alternative material for the frame like carbon fibre or G10 and machine on my CNC

Any issues using Sk450 frames instead of the 1/2" square in the BOM
I like the idea of well supported motors - just been re reading the thread, looks like the arms are fine, why is there another level of frame above the arms

Any opinion on the motors, my general reading advises use of lower kv motors, like 750kv instead of 1200kv. I'm assuming these motors have been chosen to suit the weight loading.

The flight controller is a mulitiwii, on my original design I was looking at a KK2.0 Multi-rotor LCD flight control board. I've no knowledge on this so appreciate opinions on preference - i've NEVER flown an RC ever If I go KK I assume I don't need the programmer

The 2200mAh battery packs qty 2. Is this one for use and one for spare. I was trying to get most parts from HK, so picked a Turnigy 3600mAh 30C Lipo pack is this suitable, what about a charger.

If I use this batt pack, then I guess I don't need the "fake deans" just more bullets.

What is the purpose of the Frsky Module and Receiver.

Appreciate the help guys, this looks just the ticket for a christmas project for me, and a Santa list for my kids
Last edited by out_of_control; Nov 02, 2012 at 08:47 PM. Reason: frame arms review
Nov 02, 2012, 10:14 PM
Stop me before I build again!
My spider is 3/8 inch alu c channel and 1/8 birch plywood. All cuts are squared, no angled cuts at all. Arms are 2x10" and 2x9.5" center plate is one 6x12 inch plywood cut down the center. Front is 120 degree arm angle and back is 90 degrees.
Nov 02, 2012, 11:22 PM
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rob10000's Avatar
Quote:
Originally Posted by out_of_control
Great thread, gives all the info needed - but being a noob I need a little help

Any issues using Sk450 frames instead of the 1/2" square in the BOM
I like the idea of well supported motors - just been re reading the thread, looks like the arms are fine, why is there another level of frame above the arms

I make a version out of these plans for the SK450 arms, and they work great.
The plans work fine "as is" for the bottom plate and the holes even line up, but the upper one needs the arm 'stubs" widened slightly to accommodate the width of the SK arms, because the mounting holes are further apart on the top side.
Nov 03, 2012, 06:32 AM
Registered User
Quote:
Originally Posted by rob10000
I make a version out of these plans for the SK450 arms, and they work great.
The plans work fine "as is" for the bottom plate and the holes even line up, but the upper one needs the arm 'stubs" widened slightly to accommodate the width of the SK arms, because the mounting holes are further apart on the top side.
So i'd be better getting the arms first, then modify the top plate to suit the arms before I CNC.

Thanks for the advice.
Nov 03, 2012, 06:39 AM
Registered User
Quote:
Originally Posted by brontide
My spider is 3/8 inch alu c channel and 1/8 birch plywood. All cuts are squared, no angled cuts at all. Arms are 2x10" and 2x9.5" center plate is one 6x12 inch plywood cut down the center. Front is 120 degree arm angle and back is 90 degrees.
I'm all in favour of KIS mode, "keep it simple", after all the skill is getting it to fly then actually being able to fly it (here's hoping). Having my own (DIY) CNC i'll take advantage of being able to make the palates just how I want them, cutouts where they are needed etc.

I was surprised when I saw the main plates made from wood, I reckon i'll be breaking a few on my endeavours, thats why i'm hoping to get some carbon fibre or G10 type material as i'm hoping they are strong enough to take a few tumbles.

I looked at aluminium square section, wasn't sure how much weight they would add, but seing the arms with motor mounts covering all screws sold it to me.
Nov 03, 2012, 06:45 AM
Stop me before I build again!
I have run mine into the ground a few times, no damage to the center plates. Possibly because its one screw in the arms, one pin, and friction; a hard impact is more likely to knock and arm out of position than break the ply. When I took it apart to shorten up the arms a bit I found that the alu bent before the ply broke!
Nov 03, 2012, 09:12 AM
Registered User
Quote:
Originally Posted by brontide
I have run mine into the ground a few times, no damage to the center plates. Possibly because its one screw in the arms, one pin, and friction; a hard impact is more likely to knock and arm out of position than break the ply. When I took it apart to shorten up the arms a bit I found that the alu bent before the ply broke!
Ply is quite strong, it all depends on the point of impact. I reckon i'll have tested all the possible points of impact before I get going properly.

Anyone comment on the FC selection or the frsky module ?
Nov 03, 2012, 09:40 AM
Registered User
Out_of_Control: Just in case you are new to CNC. Carbon Fiber creates an extremely dangerous dust that you don't want ANYWHERE, and especially with kids around. If you are already experienced and aware, disregard my "nanny mode" message. But I thought I'd be sure you knew to guard your health.

Hakuna
Nov 03, 2012, 10:25 AM
Registered User
Quote:
Originally Posted by hakuna
Out_of_Control: Just in case you are new to CNC. Carbon Fiber creates an extremely dangerous dust that you don't want ANYWHERE, and especially with kids around. If you are already experienced and aware, disregard my "nanny mode" message. But I thought I'd be sure you knew to guard your health.

Hakuna
Very CNC experienced, but the caution is always welcomed, it's not just me thats reading this thread.
Nov 03, 2012, 12:10 PM
Registered User
rob10000's Avatar
Carbon fiber dust isn't any more dangerous to your health than the byproducts of any other sanding or grinding operation - It's not some highly toxic material.
With that being said, the normal precautions you would take when working with ANY material where you are creating airborne dust should be taken.
OOC, CF has RF blocking properties. In this application G10 would probably be the best chioce.


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