Anyone have an easy way to reinforce GPS on apm 2.0? I ask because when I was flying my quad at the local golf course (nice soft grasss to crash on:), I did a hard bank and the velco star gave and my battery popped loose ( new strapping coming now)..
I was maybe 15 feet off the ground, and she came down perfectly upside down, landing square on the protective dome. NOTHING BROKE! not even the props, though fantastic and even flew one more time after rigging a battery strap. I got home to my bench I notice the gps was popped up but still solid on connectors, I guess the simple gforce was too much for the sudden down force of the crash I pushed it down and connected via usb to see if it worked still. It did not. SEE PHOTOS--> this is in the middle of my removal to inspect for other damage. the apm is mounted on thick double sided monutng rubber, and attached with rubber washers to the plate. The straight force was too much for the GPS mounting to take, I may need to buy a new gps for this version, but for my second APM i would want to reinforce the gps... Any thoughts how one could accomplish this...
Wouldn't ordering the GPS breakout exclude the SD card ability of the APM 2.0??
genius! reminds me of the hard drive suspended in cases
There are detailed instructions for how to do this here:
This is great!, I'm using almost the same system (the rangevideo anti-vib mount - that i found too soft so swapped out the rubber bands for these prop saver o-rings).
Now my only problem with vibration is that that comes through the wires from the reciever and those to the esc's. Is anyone aware of very soft wire we could use that doesn't transmit the vibration like the plastic coated stuff that comes with the APM?
Something like this maybe...http://www.carsrcracing.co.uk/?p=159,
Tell you what, I'll order some and report in :)
I would perhaps reinforce the GPS attachment with glue or bathroom silicone just like Dave C recommended and also I would make some sort of elastic struts like Steven Warren recommended.
But I'm not sure how much glue can you put around GPS will it work if you glue it like in this picture (yellow transparent is glue).
I have used 2-compnent epoxy (Z-poxy) glue around my APM1 usb socket, reset button and flight/edit/CLI-switch.
Thanks for all the great replies. I am still wondering if the prop ring suspension rig won't lend itself to resonance vibrations? I read the first posts before this became part of the wiki, and some were of the opinion this might be a bad idea... Is this really working out for people?
I don't know that this mount would have prevented the GPS popping loose from the board though, not with the dead shear force that it hit the ground with, but some epoxy and hot glue would probably do the trick to reinforce the solder tabs! This situation reminds me of integrated wireless in mobile devices. Inevitably if it goes bad, you have no choice but to go external. Frankly, I like the design/build option to place the APM2 inside the drone for protection with the GPS on top to open sky! So it all worked out anyway...
I like the idea that everything is in a same package. Todays GPS modules are so sensitive that you don't need to put them "visible" to satellites.
Problem is that UAVs are moving towards carbon fiber skins which block RF signals...so most of the time they need to be "visible" to satellites.
OK and that's why you can get the option without the attached GPS that STILL has the daughter board with SD card and plug the GPS module into the port. I'm not sure how you missed this, it's pretty well explained.
So I developed a small shield that can be mounted inside the boundaries of the pins and has special connectors to keep a very low profile of the system, so if you want a small board then you have it! But this shield is optional, so you can still attach your old GPS by using the standard APM V1.0 GPS connector or the classic compass port. But because I promised no soldering I have created a special I2C port (similar to the GPS) that allows you to attach an official APM 2.0 Compass board by just plugging it (yeah just plug and play). The SD slot is there because I had no other place with easy access (underneath the main board was messy and you will be obligated to dismount and flip the entire board to remove the card, you don’t want that right?). In the other hand the daughter board will come in four flavors: GPS+MAG+SD, GPS+SD, MAG+SD and SD. For example if you want to attach only the magnetometer (Compass) externally you just buy the option GPS+SD.
So right now the store sells only 2 options from the list GPS+MAG+SD or no GPS which equals MAG+SD. So yes, you can order an APM 2.0 and external GPS, mount the APM2.0 inside a carbon fiber plane and mount the GPS external. No re-engineering required.
You misunderstand the problem. I'm talking about the case for those who have already purchased the $200 onboard GPS during the preorder period. And now realize they need to purchase the mag+sd breakout separately.. but it's not for sale.
Watch out for compass reversing ! - I lost my 3DR quad with everything into the sea, it run away because the APM2 have a nasty compass reversing error.
The forum admin censored (removed) my warning to people - and sales did not bother to even comment on it.
In short: if you boot APM2 without resetting it later, compass is reversed. Also, if allowed to learn in air, it will go nuts if you did not boot, then reset again.