Zachary Koh
  • Singapore
  • Singapore
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Zachary Koh posted a status
"Hi people! Just an update to a old idea brought up a long time ago: The Verticopter. Check out the project video at: http://ning.it/XieBpp"
Feb 9, 2013
Zachary Koh replied to Zachary Koh's discussion Consult. Project: Custom frame + "New flying mode" [Code Development & new frame testing] in the group ArduCopter User Group
"Updates!Our 4th wing design flew. As a proof of concept, it works.No control surfaces, 4 motors, covers 100m in approximatly 3 seconds. Transmitter control scheme has been successfully changed.VTOL-copter now flies at 90deg pitched forward for…"
Oct 31, 2012
Zachary Koh commented on Chris Anderson's group ArduCopter User Group
"@Brint Thanks for the suggestion! It looks pretty neat.I am flying a custom frame so my team will have to design our own mount. How's the response of the servos for you? Are you using the ones available on the website as well?I take it your…"
Oct 31, 2012
Zachary Koh commented on Chris Anderson's group ArduCopter User Group
"Hey guys, I was thinking of throwing an actively stabilizing camera rig onto my VTOL copter. Anyone has experience with camera-servo rigs? Any advice would be greatly appreciated. X)"
Oct 31, 2012
Zachary Koh commented on Chris Anderson's group ArduCopter User Group
"@Jani Sorry for the lack of description. I meant to change the "stabilized" pitch angle (such that the quad would be "stabilizing" towards a vertical position rather than horizontal).Eg:Regular quad position while hovering in…"
Sep 27, 2012
Zachary Koh commented on Chris Anderson's group ArduCopter User Group
"I'm trying to change the "reference" for the stabilize function from eg: 90deg to 180deg. Can anyone proficient in understanding the ArduCopter program point me to where I should be looking?Your help would be much appreciated."
Sep 27, 2012
Zachary Koh commented on Chris Anderson's group ArduCopter User Group
"@Marooned Hmm. Do you mean using Mission Planner to upload the 2.7.3 firmware erases the existing radio calibration? If that's the case, we should not have to redo the radio calibration since we uploaded both 2.7.3 and our custom program…"
Sep 26, 2012
Zachary Koh commented on Chris Anderson's group ArduCopter User Group
"@MaroonedThe team moved from the 2.7.3 to our custom program without performing radio calibration and did not have any problems. But moving back, the 2.7.3 produced no response.If shifting from one firmware to the next did not give any problem,…"
Sep 26, 2012
Zachary Koh commented on Chris Anderson's group ArduCopter User Group
"@RandyTHANKS. I was extremely worried that my programming could have created some problem with the power distribution and inadvertently fried the apm.But now, we realized that our NEW program allows the apm to function properly (i.e. board powers…"
Sep 26, 2012
Zachary Koh commented on Chris Anderson's group ArduCopter User Group
"Is it possible to fry your apm board through errors in the arducopter program?"
Sep 26, 2012
Zachary Koh replied to Zachary Koh's discussion Consult. Project: Custom frame + "New flying mode" [Code Development & new frame testing] in the group ArduCopter User Group
"Randy, Hmm. So I've tried making some changes to the update_simple_mode and the angle_boost functions. I have not seen any difference in flight however. I do not fully understand the simple_mode function nor the angle_boost and I am sure I did…"
Sep 16, 2012

Developer
Randy replied to Zachary Koh's discussion Consult. Project: Custom frame + "New flying mode" [Code Development & new frame testing] in the group ArduCopter User Group
"Zachary,      Have a look at the update_simple_mode function.  You'll see it just replaces the values in g.rc_1.control_in and g.rc_2.control_in with modified values.  I guess you could very well do something…"
Sep 13, 2012
Zachary Koh replied to Zachary Koh's discussion Consult. Project: Custom frame + "New flying mode" [Code Development & new frame testing] in the group ArduCopter User Group
"Today, we're looking at replacing Simple Mode flight with our "transited mode". On the ArduCopter 2.7.3, is Simple Mode found under "case ROLL_PITCH_TOY" or "ROLL_PITCH_STABLE_OF"? The ArduCopter wiki says it…"
Sep 13, 2012

Developer
Randy replied to Zachary Koh's discussion Consult. Project: Custom frame + "New flying mode" [Code Development & new frame testing] in the group ArduCopter User Group
"Zachary,      Great!  All sounds good.  when you're pitched over at 80deg, your heading/yaw control will be quite bad I think without the other changes but that's cool for now..sounds like a good…"
Sep 13, 2012
Zachary Koh replied to Zachary Koh's discussion Consult. Project: Custom frame + "New flying mode" [Code Development & new frame testing] in the group ArduCopter User Group
"Done. We've removed the angle limits for flight. We now pitch and roll at 80deg! Waiting for the wing to come in before trying anything further. Curious, why would we want .pde over .ino? .ino works just fine uploading and in flight. Also,…"
Sep 13, 2012

Developer
Randy replied to Zachary Koh's discussion Consult. Project: Custom frame + "New flying mode" [Code Development & new frame testing] in the group ArduCopter User Group
"ok, you shouldn't have any .ino files by the way.. there's a preference in the arduino ide to rename all files from .pde to .ino..you should uncheck that preference and rename all the .ino files back to .pde.  It won't cause…"
Sep 12, 2012

Profile Information

About Me:
Student.
Interested in planes.
Please tell us a bit about your UAV interest
Currently working on a UAV project that mixes both quad and plane functions.
Hometown:
Singapore

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