Motor mount v2

The improved motor mounts will be available in the next batch of kits, which is still scheduled to be ready in the end of June, and also as a separate spare part item. For the next batch the Crazyflie kit without the Crazyradio and antenna will also be available for ordering.

On another note we are planning on modifying our webpage a bit. We feel that when new people visit our webpage they get no overview of our projects. So we are planning a nicer landing page with some images and more general information. We will of course keep the blog and also keep updating it at least every Monday. Aside from this we are also planning on integrating the forum and wiki with the blog and also have the same theme. After doing a quick test with the forum we are pretty sure our green/black theme will look good, but we aren’t that convinced about the wiki…. Let’s see where we end up. If you have any suggestions or comments about the webpage and our plans then  don’t hesitate to leave a comment below.

Lastly we have also installed TapaTalk on our forum. So if you use the TapaTalk app you can find our forum in the directory by searching for Bitcraze.

• Upgraded version to of Xubuntu to 13.04
• Improved README and instructions inside VM
• Updated to the latest version of repositories
• Added script for updating all the project repositories
• Added pre-configured JTAG debugging for Eclipse using BusBlaster
• Added KiCad and the Crazyradio design files

More information on the Bitcraze VM can be found here and it can be downloaded from this link. If you don’t want to download our virtual machine but instead make your own then have a look at this guide on the wiki.  It details how to get Xubuntu running in VirtualBox with all the pre-requisites for the development environment.

We have finished cleaning up the Crazyradio design files and they are now added to a Bitbucket repo. The project includes a cache file with all the components from our library that we have used. Once we are finished with cleaning up the component library it will also be uploaded.

• The propeller test is getting even better thanks to DesTinY
  
• We have seen a screenshot from allynbauer of a new advanced input axis configuration
• We have had lots of improvements from Daniel Lee in the form of PEP-8 formatting of the client code.
• The split axis configuration UI from Philipp Mohrenweiser is now merged.
• Philipp Mohrenweiser  work on the hover mode is progressing and will hopefully be working well and merged soon.
• Jan has developed the Crazyflie Nano C++ Client Library which will be of great help for all C/C++ fans wanting to interface with the Crazyflie.

And of course thanks to everyone that keeps updating the wiki and helping out in the forums!

The planning for the next batch is finished and it’s now going into production. Expected to be ready in the end of June. For this batch we have modified the motor-mounts to add some space at the bottom and also increased the size of the “stopper” at the bottom of the mount to keep the motor from popping out.

From now, as been requested, we will also start offer the parts of the kit separately: The Crazyflie 6/10-DOF, the Crazyradio and the antenna. Aside from this we will still be offering the previous kits and all the spare parts.

A new source version of the Crazyflie PC client has been uploaded to the Bitbucket page. Since this new version mostly fixes critical bugs related to mac, there’s no new version for the Windows installer.

For the next version of the windows installer we are looking at packaging and installing Crazyradio driver with the client. We are also looking at making Ubuntu packages accessible in a PPA as well as Fedora/OpenSuse packages. This would simplify the Client installation on Linux. ArchLinux already have a package in AUR  courtesy of Gergely Imreh.

We will soon be releasing a new cf-client that will close some bugs and especially the OSX bug which could make your Crazyflie go full throttle if the controller is accidentally disconnected during flight.

Our to do list is currently huge but this is a subset of what’s on the list right now.

• Implementing GUI in the cf-client  for updating the Crazyradio.
• Updating the wiki and especially the trouble shooting page.
• Fixing bugs
• Implementing brushless controller driver.
• Support
• Accepting pull-requests
• Administration
• Cleaning up in the forum
• Planing JavaForum presentation
• Crazyradio PPM input
• …

As you can imagine we have our free time pretty much planned out .

• People have started looking at the pressure sensor that is mounted on the 10-DOF version. phiamo is working on a hover-mode using the pressure sensor. There’s more information and code in this post.
• Contributions to the Mac OSX install instructions have been made and they are now usable.
• Another frame has been designed by bscott and is uploaded on Thingiverse. No doubt, next on the Bitcraze shopping list is a 3D printer.
• The USB3 issue on the Crazyradio has been fixed so there’s a new version of the firmware. If you don’t have any problems with this then don’t update, because there’s a slim chance of bricking the radio (see the wiki page). The firmware is available here and instruction on how to update it are here.
• A nasty bug on Mac OSX has been reported. When loosing connection to the input-device the output will become 100% thrust and it will not stop until the radio looses connection. This issue has been fixed in the latest version from the repository.

The Crazyflie Nano Quadcopter kit 10-DOF is out of stock again but there’s still some 6-DOF units left. We are currently planning the next batch but until then there will be a few more units (~50) that will drop into the Bazaar.

In order to have a better overview of which problems that have been solved and which still needs attention in the Support forums we are setting up some guidelines, which will be done during the week. So if you are hanging around in these forums or you want to get some support, then please have a look at the instructions.

If you live in the south of Sweden and you are interested in the Crazyflie drop by Javaforum next Tuesday (21/5) where we will be presenting.

Like we said last week, this is the first time we distribute the software/firmware/hardware widely and there’s a few bugs that has been found. We are currently correcting the most important ones and will post updates for the firmware and software once we fix enough of them. If you want to follow the progress drop by the bug tracker on Bitbucket for the PC-client, Crazyflie and Crazyradio.

We are doing our best to answer questions and give support in the forum, but there’s a couple of issues that we would like to highlight to make the assembly and usage easier for everyone. Please be careful with your new Crazyflies, they are not unbreakable.

• After the motor wires has been soldered make sure to inspect for shorts and especially to the resistors, red highlighted area, in the picture as it can damage the digital voltage regulator. This will show up as that the blue LEDs wont light up and the other LEDs will be dim. To fix this the regulator U9 will have to be exchanged. It is the SOT23-6 package in the picture.

•  The Crazyradio doesn’t work on USB3 ports but a fix is on the way. Until then the work-around is to use USB2 ports.

• If the Crazyflie crashes upside down there is a chance the motor bearing gets depressed. There is a protection for this and that is to carefully glue a spacer between the motor and the propeller, similar to what we have done in the picture. That will prevent the propeller from pushing on the bearing but will instead be pushing on the spacer which will absorb the force much better. The spacer needs to be higher then the motor bearing else it will not work that well.

• Loading an already existing input-device configuration in the PC-client does not work, the best is to start from scratch (see this issue). Also when configuring the input-device you will have to map all the axis and buttons before you can save the configuration (see this issue). For more information on device-input configuration see this page on the wiki.

Unfortunately the production of the new motor-mounts has been delayed and they will not be available for order until next week. But the kits that are currently in stock still contains a spare motor-mount.

Happy flying!!

For anyone who missed the pre-order, more kits will be available at Seeedstudio from the 6th of May. In addition to the products that are already there we will also make the motor-mounts available as spare parts. The 6-DOF and 10-DOF kits will be the same as for the pre-order (include the Crazyradio dongle) but the price for the 10-DOF kit will be updated to $179. Why the new price? Adding the two sensors turned out to be a bit more pricey then we thought.

Now to the technical stuff, here are some of the updates since last week:

• Updated assembly with the new motor-mounts
• Binary distribution page containing a brand new Windows installer for the Crazyflie Client (no need to install dependencies anymore) and also the latest firmware build for the Crazyflie.
• A lot of smaller bug-fixes in the client and improved performance of the Crazyflie. So make sure to update to the latest firmware/client when you get you Crazyflie.
• The Wiki is being updated (as always) and we are doing our best to catch up. We haven’t had time to set up the registration for the wiki, but if you feel like doing some editing drop us an email and we will set you up with an account.

Since this is the first time the Crazyflie and Crazyflie PC client are distributed there are bound to be bugs that we haven’t caught yet. So if you find any bugs it would be great if you wanted to drop by our Bitbucket page and report issues. And if you feel the urge to write some code, then have a look at how to contribute. There will probably be some bug reports and if not there’s always the wishlist.

We are always eager to get some feedback from our users so drop by our forum and let us know what you think about our projects or to pitch some crazy project ideas.

We finally got to measure the weight more precisely, just under 19g

Crazyflie weight with new motor mounts

A big thanks to Seeedstudio for making this possible. And to all of you, we really hope you enjoy your new Crazyflies

There are some updates to the pre-order kits which we hope you will be happy about. We have added two extra propellers in each kit. We have also updated the motor mounts to real moulded ones which should be easier to work with and more durable. They don’t require any glue, handles impacts and vibration better. The 3D printed motor mounts was not a viable solution when the volume increased so we have been working really hard on getting these ready in time. Since the new motor mount wasn’t available to order as a spare part during the pre-order, we have include a spare one in the kit for you.

Assembled Crazyflie with new motor mounts

The pre-order shipments will start as announced, on Apr. 25th, and finish on Apr. 30th. Orders will be shipped out in the order they where placed so second batch orders will be shipped a bit earlier with the last order going out on Apr. 30th.  Since Seeedstudio got a lot more pre-orders than expected, the first batch orders will need some more time for packaging and delivery and couldn’t all be shipped on Apr.25th, please understand.

Keep in mind that we are still doing development on both the firmware and software as well as continuously updating the wiki. So once you get your Crazyflie visit our page to get the latest updates and information on how to assemble the kit and start flying. Updating the firmware only takes a few minutes and you will get the latest features.

Thank you!
Bitcraze

Since we had some problems getting vacation all at once from our employers we decided to travel separately and overlapping each other a bit. Tobias left first and then me and Arnaud a couple of days later. After roughly 22 hours of travel we landed in Hong Kong and took the bus/train to Lo Wu to the Chinese boarder. Since I went traveling the week before and I couldn’t send my passport for the visa application we took the chance that we could apply for one at the boarder (after reading about it online). Turn out that it’s very easy to get a visa for the Shenzhen area (not all of China) at the boarder at Lo Wu. Took about 5 minutes and cost between ~130 yen. Just note that it’s not all nationalities that this applies to and the rules seem to change every once and a while.

Meanwhile Tobias spent his time visiting Seeedtudio and got to see the production. All the PCB assemblies was already done but the testing was running full speed. We use a simplified bed of nails test-jig that does the programming and tests voltages, current, battery charging, motor drivers etc. It is working very well and every Crazyflie plus Crazyradio takes about 2 minutes to program and test.

Visiting at Seeedstudio was great! We have been mailing and talking on Skype for the last 18 months with lots of people there and it was great to finally meet them in real life. Of course we got a guided tour around their offices which seems like a great place to work, lots of electronics everywhere We also got a chance to catch up on the progress for the production. There’s lots of practical problems to solve when we scale up from only doing prototypes to full production, such as test-rigs for the Crazyflie.

After doing some research online we decided to head for the SEG Electronic Market to check it out and do some shopping. Inside it’s like a bazaar filled with small corridors and little booths selling all kinds of stuff. And this continues for 9 floors! On the first two floors you will find mechanics, electronic components, measurement equipment, leds, cabling… The list just goes on, they even had a small pick and place machine for prototype batches. Continuing upwards it becomes more and more computer hardware like graphics cards, mother boards, memory and hard-drives. These floors also have stuff like routers, cameras and tablets. Going even higher up everything is put together and you can buy laptops and computers. Its really amazing the diversity of things you can find, we even saw some cashier machines. Walking from the bottom floor upwards we really got the feeling that as you get higher things get more and more assembled. And everything is very cheap, for example we bought 300 pogo-pins in different variations for 100 yen (~16 USD), but expect the quality to be there after.

So what did we end up buying? Well, lots of stuff! We bought a lot of prototype stuff that we will use for the Crazyflie like cables, antennas, screws and batteries. And we also found a really nice USB microscope with a stand that does 500x magnification

We uploaded some photos to our Picasa album for Seeed/Shenzhen.