Posts: 2,410 Threads: 136 Likes Received: 1,790 in 1,052 posts Likes Given: 3,302 Joined: Jan 2017 Reputation: 50 (29-May-2018, 06:55 PM)Gary pug master Wrote: Hey DOP, (droneofprey)On your build, because I am still new to this how did you power your fc. I am using a 4in1 spedix 20a esc with no bec and a matek405 mini. This is my first 4in1 I really don't want to get the fc with bat. No room for pdb, and I looked at your build log and we are very simular. Any advice? I used HGLRCs F428 stack which the FC plugs straight into the ESC with pins when stacked. Very easy to build on. In your case, it looks like that ESC only provides battery voltage, as far as I can tell. (hard to find the schematics lol) Your FC will only take 5v, so you will more than likely just need a small voltage regulator/step down. Something like this. https://www.getfpv.com/electronics/volta...lator.html Or this one is a bit nicer. (better output current amd can take more than 4S power. https://www.getfpv.com/electronics/volta...lator.html ![[-]](https://intofpv.com/images/collapse.png) • Posts: 12,099 Threads: 125 Likes Received: 3,739 in 2,836 posts Likes Given: 99 Joined: Feb 2017 Reputation: 388 30-May-2018, 03:26 PM (This post was last modified: 30-May-2018, 03:28 PM by voodoo614.) (29-May-2018, 06:55 PM)Gary pug master Wrote: Hey DOP, (droneofprey)On your build, because I am still new to this how did you power your fc. I am using a 4in1 spedix 20a esc with no bec and a matek405 mini. This is my first 4in1 I really don't want to get the fc with bat. No room for pdb, and I looked at your build log and we are very simular. Any advice? I have a very similar build from your. I went with the Matek 411 AIO 20mm, which takes lipo voltage. In a small build, there is no room for separate BEC. Or the build just doesn't look clean with BEC. • Posts: 123 Threads: 13 Likes Received: 25 in 23 posts Likes Given: 33 Joined: Jan 2018 Reputation: 0 (30-May-2018, 03:26 PM)voodoo614 Wrote: I have a very similar build from your. I went with the Matek 411 AIO 20mm, which takes lipo voltage. In a small build, there is no room for separate BEC. Or the build just doesn't look clean with BEC. I purchased a new stack, just no way to fit. Picked up a Martian 2 frame that I will put the 405 and spedix in, already have motors and hrs. Should have done my research ... bad monkey. Posts: 2,410 Threads: 136 Likes Received: 1,790 in 1,052 posts Likes Given: 3,302 Joined: Jan 2017 Reputation: 50 (30-May-2018, 10:06 PM)Gary pug master Wrote: I purchased a new stack, just no way to fit. Picked up a Martian 2 frame that I will put the 405 and spedix in, already have motors and hrs. Should have done my research ... bad monkey. We've all done it somewhere down the road  At least it's a decent excuse for another build right.  Posts: 123 Threads: 13 Likes Received: 25 in 23 posts Likes Given: 33 Joined: Jan 2018 Reputation: 0 (31-May-2018, 12:22 AM)Drone0fPrey Wrote: We've all done it somewhere down the road
At least it's a decent excuse for another build right. Only problem wife has been adding to my honey do list. Claims my hand is healed enough to build so many quads i should build a new patio and fish pond. Darn almost got out of that one....? Posts: 2,410 Threads: 136 Likes Received: 1,790 in 1,052 posts Likes Given: 3,302 Joined: Jan 2017 Reputation: 50 (31-May-2018, 05:17 PM)Gary pug master Wrote: Only problem wife has been adding to my honey do list. Claims my hand is healed enough to build so many quads i should build a new patio and fish pond. Darn almost got out of that one....? It's because we have helping hands when we solder and build a quad.   Posts: 44 Threads: 4 Likes Received: 6 in 5 posts Likes Given: 4 Joined: Jun 2018 Reputation: 0 You ever figure out anything on these motors? I had some that probably had about 2hrs of flying on them and they were as crunchy as anything after that, 3 of the 4 at least. Replaced them a few days ago, and we'll see how it goes. But I just found this post. Similar story with mine. I didn't hand spin them quickly like you did, but wobbling the bells back and forth while they were mounted to the quad revealed the shaft had some play in it. The only one that didn't crunch also did not have the wobbly bell; it was tight as a tick. I'm talking about fractions of a degree of wobble; you could really only feel it, not see it. (31-May-2018, 07:10 PM)Drone0fPrey Wrote: It's because we have helping hands when we solder and build a quad. Posts: 2,410 Threads: 136 Likes Received: 1,790 in 1,052 posts Likes Given: 3,302 Joined: Jan 2017 Reputation: 50 I still have them in the parts bin lol. I would like to eventually get around to changing out their bearings for some ezo's but I haven't even looked into it yet. • Posts: 44 Threads: 4 Likes Received: 6 in 5 posts Likes Given: 4 Joined: Jun 2018 Reputation: 0 Ezo's? Link? The one remaining motor I had from the originals that wasn't crunchy yet, finally went crunchy this morning. That is super weird that they all went within that short amount of time relative to each other. Is it possible there was a bad batch of bearings? I hope the new ones I replaced them with will last A.LOT. longer. Those original motors probably had less than 2hrs on them. (28-Aug-2018, 12:37 PM)Drone0fPrey Wrote: I still have them in the parts bin lol. I would like to eventually get around to changing out their bearings for some ezo's but I haven't even looked into it yet. • Posts: 2,410 Threads: 136 Likes Received: 1,790 in 1,052 posts Likes Given: 3,302 Joined: Jan 2017 Reputation: 50 Ezo are just high quality high speed bearings. I am not sure of the bearing size in the 1408 motors as I have not pulled them out yet.
Once you know the size, just do a search ezo followed by the dimensions (7x4x2 for example)
If I get time today I will try to get the bearings popped out and measured. • Posts: 44 Threads: 4 Likes Received: 6 in 5 posts Likes Given: 4 Joined: Jun 2018 Reputation: 0 Oh ok thanks man. I'd love to make that modification if I could find out what size, etc. Also, what tool do you use to get those c clips off of the Sunnysky 1408's? I mucked around a little with it before lunch using some tweezers and was unsuccessful. Wow that is a pain. (29-Aug-2018, 04:31 PM)Drone0fPrey Wrote: Ezo are just high quality high speed bearings. I am not sure of the bearing size in the 1408 motors as I have not pulled them out yet.
Once you know the size, just do a search ezo followed by the dimensions (7x4x2 for example)
If I get time today I will try to get the bearings popped out and measured. Posts: 44 Threads: 4 Likes Received: 6 in 5 posts Likes Given: 4 Joined: Jun 2018 Reputation: 0 Second series of flights with the 3 new motors and one old one, and I'll be dern if the old one didn't get the loose bell like the others did, and another - one of the new ones - started to.
Not sure if that matters or not :/ we'll see how these end up going. It did start to sound crunchy very very slightly towards the last few packs. • Posts: 1,504 Threads: 83 Likes Received: 944 in 654 posts Likes Given: 2,142 Joined: Sep 2016 Reputation: 24 Sadly this doesn't look like an isolated incedent. My LDARC (KingKong) motors which look exactly like the Sunnysky (1806 2500kV) have the same issue. Started out nice, smooth and quiet, but after a few hours flight the bearings are crunchy and now very slight play on the bell, they are still flyable though. At under $10 per motor I wasn't expecting amazing quality, but I did hope for a bit more life than that! I will be pulling the bearings out and measuring them to order some higher quality replacements pretty soon... Windless fields and smokeless builds Posts: 44 Threads: 4 Likes Received: 6 in 5 posts Likes Given: 4 Joined: Jun 2018 Reputation: 0 Is it almost certainly a bearing problem? (30-Aug-2018, 07:55 AM)Tom BD Bad Wrote: Sadly this doesn't look like an isolated incedent. My LDARC (KingKong) motors which look exactly like the Sunnysky (1806 2500kV) have the same issue. Started out nice, smooth and quiet, but after a few hours flight the bearings are crunchy and now very slight play on the bell, they are still flyable though. At under $10 per motor I wasn't expecting amazing quality, but I did hope for a bit more life than that! I will be pulling the bearings out and measuring them to order some higher quality replacements pretty soon... • Posts: 2,410 Threads: 136 Likes Received: 1,790 in 1,052 posts Likes Given: 3,302 Joined: Jan 2017 Reputation: 50 (29-Aug-2018, 06:13 PM)x91qLt7 Wrote: Also, what tool do you use to get those c clips off of the Sunnysky 1408's? I mucked around a little with it before lunch using some tweezers and was unsuccessful. Wow that is a pain. Lol. Yeah I totally prefer screws over c-clips Best practice I have found is to use a small set of needle nose pliers. They make actual c-clip pliers though, I have just never had a pair. Also I stick my hands and everything inside a large zip-lock bag, or the likes there of, to help catch the c-clip. Most times they go shooting off! (30-Aug-2018, 07:55 AM)Tom BD Bad Wrote: Sadly this doesn't look like an isolated incedent. My LDARC (KingKong) motors which look exactly like the Sunnysky (1806 2500kV) have the same issue. Started out nice, smooth and quiet, but after a few hours flight the bearings are crunchy and now very slight play on the bell, they are still flyable though. At under $10 per motor I wasn't expecting amazing quality, but I did hope for a bit more life than that! I will be pulling the bearings out and measuring them to order some higher quality replacements pretty soon... Bummer Tom, sorry to hear that man. Is that on your 4 inch? Let us know how it goes. (30-Aug-2018, 12:55 PM)x91qLt7 Wrote: Is it almost certainly a bearing problem? That's where my money's placed. For me at least. There can be a number of other things that can put noise into a miniquad though. What other troubleshooting have you done? What flight problems are you experiencing? Bad motor bearings can usually be physically felt and/or heard though. • |
