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Printing 3d Forum
Started by TheEdge, Monday,May 05, 2014, 21:29:32
Quote from: HowDoIfly on Saturday,June 21, 2014, 18:52:22 The RTL and Loiter issues support the compass is mounted/configured wrongly. According to the pic I linked to, you have it back to front.
Quote from: TheEdge on Saturday,June 21, 2014, 20:04:13 Yes, I would also say that this is an issue with compass/gps, I just don';t know what..According to the picture I linked to, I had it mounted correctly, but have also tried with rotating it like in the picture you linked to, still the same..
Quote from: HowDoIfly on Saturday,June 21, 2014, 20:18:14 What APM firmware version are you using? I just caught one instruction that claims that unit is not compatible with APM:Copter 2.9.1b and earlier
Quote from: HowDoIfly on Saturday,June 21, 2014, 21:49:35 According to the guide, you plug in and mount the GPS with compass, then set the declination (we use a negative number) then select the orientation correction (which yours appears to be roll 180 if the compass is underneath) and then the calibration. That is the minimum you must do.
Quote from: HowDoIfly on Saturday,June 21, 2014, 23:02:23 Yes, your mag dec is 0.49In mission planner, if you look at the compass bearing, it should show your quad';s magnetic heading. If you know your bearings, point the quad at a known quadrant (N,S,E,W) and check it shows that heading (for me, I';m sitting at my computer facing roughly north). Yaw the quad clockwise and check the heading reading follows suit N->EE->SS->WW->Netc. It might be inaccurate if there';s nearby interference but it should show if it';s going round the right way at least.
Quote from: HowDoIfly on Saturday,June 21, 2014, 23:51:51 If you examine the magnometer, there should be a white dot in one corner. Reference the part number for the spec sheet which will tell you it';s direction of axis. The GPS antenna needs to be right way up (facing the sky), otherwise it';s orientation doesn';t matter.When you';ve worked out the orientation of your compass, there';s a whole host of dropdown options in mission planner to flip axis around to your hearts content.
Quote from: TheEdge on Monday,June 23, 2014, 19:57:55 Well, the white dot is in the front left corner. Mounted like that the heading is correct. So if I flip it over sideways, the white dot will be in the front right corner, but upside down compared to now. Heading should still be correct, but y-axis would sort of need to be inverted.. I don';t know what setting I would have to change to give the correct function if I flip it over.. Rotation Roll 180 seems logic to me, but I tried with that setting before I flipped it upside down, so I don';t know..
Quote from: TheEdge on Tuesday,June 24, 2014, 06:26:21 Yes, I guess we are a bit off topic since I started out with a crius and megapirate, but thank you for staying.I looked in the datasheet yesterday but did not find anything there that helped me.Maybe you have better luck. Here';s a closeup of the chip.When I flip the unit over so that the gps face the right way up, also I have the dot in the front right corner(pointing to the ground since it is on the underside of the gps), so I guess I could use same settings as you??
Quote from: HowDoIfly on Tuesday,June 24, 2014, 08:26:51 As I mentioned before, we don';t care about GPS orientation as long as it';s antenna faces upwards. We need to identify the magnetometer chip and it';s orientation on the board.
Quote from: TheEdge on Tuesday,June 24, 2014, 09:07:18 one would not really need to know the actual orientation
Quote from: HowDoIfly on Tuesday,June 24, 2014, 09:23:57 The big chip is the ublox gps, not the magnetometer.
Quote from: TheEdge on Tuesday,June 24, 2014, 18:29:37 Just flipped it over sideways and changed compass to rotation_none. It is correct now, with the gps on top.Thank you for all contributions.I might do some more attempts with the Criusboard maybe on a miniquad or something, so maybe I';ll have some more questions here later on topic..
Quote from: Hands0n on Thursday,June 19, 2014, 08:59:12 If you get a duff one it is not going to be anything other than bad luck. That said, of the several I';ve bought on eBay over the past 12 months I';ve had 100% success so far.
Quote from: Hands0n on Saturday,June 28, 2014, 16:04:10 Noooooo! Don';t do that. There will always be an explanation for what went wrong. Crashing is not inevitable but an ever present chance. What you have just described sounds like something else completely, not the flight controller but perhaps the RX or even TX Throttle input to the FC. If it were a fault associated with a single motor if expect it to tip or flip over, not for all motors to slow down. I';m sure that working through this latest problem with folk on here will restore you to flight again. I';ve had "suicidal" aircraft in this one year of experience and learned that all the faults can be tracked down by a process of elimination.Sent from my Nexus 5 using Tapatalk
Quote from: HowDoIfly on Saturday,July 05, 2014, 08:24:24 Sorry I';ve not read the thread for details but I can run through the log for you.From an APM perspective (megapirate might do things different by default)...The crashlandings log...Pre-Arm checks are disabled. (not advisable)Only 5 sats and high HDOP (3.2-5.6) reported.While this probably doesn';t help pinpoint the cause of your crashes, they are worth noting and fixing as a matter of course.ETA: Do you have anything commanded through Channel 7? I notice it cycles rapidly between "normal" and "low" occasionally.
Quote from: TheEdge on Saturday,July 05, 2014, 13:38:31 Thank you for reading the log. I have not found a good way of reading the logs yet.Yes, I disabled the prearm checks just to get started, cause I was doing the initial tests inside and had trouble getting gps lock inside, so I turned it of to be able to arm it for testing. Forgot to reenable it.We(several quadcopter pilots here) have had some issues with the number of usable gps. So since I was in loitermode both times I crashed, it might be gps related. Have just never had something like this happened before, so it might also have something to do with the fact that I mounted my mobius camera and a vtx just before the flight. Before this the thing was flying very nice, so I thought I was finally ready to go fpv with it.I am not sure about channel 7 but I have the Turnigy 9x set up with a progmix that combines a 2 and a 3 way switch to give me 6 flightmodes. Flightmodes is connected to channel 5 but I noticed that I was not able to make use of all 6 positions untill I connected a cable from the receiver to channel 7. When I flick one of the flightmode switches, the value of channel 7 changes. Does the activity of channel 7 you question correspond with the change of flightmodes?Or maybe it could be that either the camera or the vtx creates some disturbance on channel 7..I have not fully understood the way the progmix of the turnigy 9x is working, so I might have done something strange there. I was hoping that the progmix would need only channel 5 for all 6 flightmodes so that I could use channel 6,7 and 8 for other things, but I might have it set up wrong.The receiver is not currently connected, so I am not sure exactly how I had it connected and what went to channel 7.
Quote from: HowDoIfly on Saturday,July 05, 2014, 14:11:16 Out of the logs in your zip attachment, are any of them prior to adding the camera and vtx? If you can pinpoint one, I can compare SatCount and HDOP.I';m still learning T9X settings but if you go into the menu you can see which additional channels (5-9) are enabled and what they';re assigned to. I don';t know how to work it out (or hazard a guess) from the logs, tbh.
Quote from: HowDoIfly on Saturday,July 05, 2014, 16:36:43 Pretty much the same for the other two logs, low Sat count and too high HDOP. How is your GPS mounted and do you wait for it to get updated data or just arm once you get a 3D fix?
Quote from: HowDoIfly on Saturday,July 05, 2014, 16:29:10 I';m working my way back from the crashlanding log. The previous is also showing 5 (at most) Sats and a slightly better but far from ideal HDOP of just under 3Also notice this22/06/2014 16:24:53 - 010729: THROTTLE ERROR: Throttle dropped below FS_THR_VALUE meaning likely loss of contact between RX/TX.22/06/2014 16:24:53 - 010729: THROTTLE ERROR: Current Distance from Launch is 18.58m ~ 60.95ft22/06/2014 16:24:53 - 010729: THROTTLE ERROR: Current Direction of UAV is 131 degrees (0 = north).22/06/2014 16:25:08 - 011300: THROTTLE ERROR: Throttle error resolve meaning likely RX/TX contact restored.
Quote from: HowDoIfly on Saturday,July 05, 2014, 16:23:38 Sorry, just got back from an errand, I';ll work my back through the logs (from crashlanding one) and see if the Sat stuff is different.No worries about Ch7 if it';s unused. It';s just showing as flipping between two ranges (low and normal) so guess the dial is sitting just on the cusp.brb
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