Hello. I am enjoying assembling this robot cat ,Nybble .
But I can't finish setup.
I can't finish calibration. I tried calibration more than ten times.
But I can't finish because the cat move abnormally.
After I typed 'c', all servos were moving and stopped.
After stopping I tried to calibrate and joined leg parts.
And I calibrate each of servos, the 10th servo, the 9th servo, the11 servo, the8 servo, and the cat abnormally .In that case I can't stop it. Several of servos moved abnormally.
After that I unplugged USB cable from uploader. And I reconnected USB cable.
But the cat move abnormally again. So I have no choice but to reset the cat.
Is this cause battery trouble? USB cable trouble? and other?
Could you tell me the why?
The first half of the video shows the situation before and after the start of calibration. The second half of the video is an operation check after writing Nybble.ino. At the end of the video, Nybble tries to walk with knees and elbows.
In writeInstinct.ino, it just writes constants to the static memory. Token “c” will make the robot stand on elbows and knees. “kbalance” makes it stand on feet. You may have some mistakes when attaching the legs during calibration. Enter “c” first then attach the legs in 90 degrees. After uploading Nybble.ino, the cat will self balance when stands up. There’s a voltage watcher that beeps if the voltage drops too much during movement. Since you are powering the servos directly by the batteries, it’s probably the limited discharging ability of batteries.
Hello. Thank you for your reply.
I use an unknown battery as external power supply.
I live in Japan. I read "Report your battery'. But maybe , I can't buy batteries from walmart.(Maybe I can't bought batteries from USA. Lithium ion batteries may ignite and air transport is prohibited. )
So I was looking for “14500 3.7V li-ion battery unprotected” .
But I found this one as battery to get easily.
I bought the battery at the following website.
But I don't know the manufacturer of this battery.
The cat has to be powered by external power to move. The USB cable cannot supply that much current. Check the video in the post about the battery.