uArm calibration issue

uArm Swift (Pro) Troubleshooting
1

Hello,

I´m having trouble calibrating my new uArm metal.

I´m using the arduino library from here : GitHub - uArm-Developer/UArmForArduino: Arduino uArm Metal Library (uArm Metal only)

When running the calibration, i do the following :

  • press “c” to launch the calibration process
  • put the arm in the callibration position and press “1”

IMPORTANT : I actually don´t kmow what the correct callibration position is. I´m supposed to orient the servos at 45, 130 and 20 degree but I don´t know how the angles are measured.

Anyway, i tried with different positions but every time, the values returned for offsetRot, offsetL and offsetR are “ovf” (overflow I gues, I´m new to arduino).

I also wrote a short programm to try to understand the issue. In fact, every time I try to read the angle of a servo, i get “ovf” in return.

Could it be that there is a hardware problem with the servos? This would mean that all servos have exactly the same issue.

Or am I just missing something / doing something wrong?

Thanks ind advance for your answers

P.S. I´m also sending a support ticket to uFactory

EDIT:

I noticed that while executing the calibration, there are some servos that return :
lr.getA():0.00
lr.getB():0.00

I´m just guessing, but for me this means that the servo doesn´t work properly.
However, it´s interesting to see that if i reboot the arduino (unplug/replug), it´s not always the same servo which has this error.

2

Hi tschild,
1, Can I have your ticket number in Support, pls?
2, Can I have link you refer to as Calibration in Github? This is the old version for Calibration.
3, Pls refer to our page first for Calibration https://ufactory.cc/cn/uarm_metal/

Poppy

3

Hi Poppy,

Thanks for your reply.
Somehow I couldn’t make a ticket, I couldn’t log in. I instead wrote an e-mail to info@ufactory.cc

I tried an older version of the UArmForArduino library (6.0) qnd it worked better.

I’m still wondering why it doesn’t work with the new version.

4

Hi Poppy, I also need to know what the correct way to calibrate the uarm Metal is. The link you posted is a link to the Chinese version of the main site, do you have a link directly to up to date English instructions on how to calibrate the uArm?

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