I found the problem, but i still need help with Brat

I think i found the Problem: I Rushed a little on my last offset adjustment(yes, i am very embarassed). i measured the angle of the hips, and they were ok, but what are some good hints that my robots servos have been recalibrated to precision??? (Like i said earlier, i used the BASIC Atom Pro BRAT servo offset finder program.)

please respond,
droideka277

The precision is when your angles are as close to the required angle for any one particular joint without having any stress on any other joints. The brat should stand straight with the angles of the joints as square as possible without causing the servos to work against themselves.

Every Brat is going to have different offsets because the servos used will have variations of true center. You can see this by sending a servo pulse of 1500 (center) and observing the hole pattern on the servo horn will be to the right or left of center.

It would be helpful for you to mention at what point (which step) within the tutorial that it no longer makes sense to you.

The idea here is to align the servos so the legs are “lined up” and everything is square, level and plum. :wink:

not sure why you started another thread on the same problem but anyway.
you need to make sure the servos are near center before you add them to the assembly. once you have done this and the centers are close you can then use the selected program to a line the servos to their exact center.

you can use Lynxterm
or something similar.

by your post/s im not quite sure what you are asking?

i am adjusting the offsets as i type. i made the same adjustments on the left leg as i did the right leg, but they are completely different. an error in assembly has been made. i shouldnt have removed the servo horns so i could “test” the others, because now i have to find the offsets AGAIN!!! :angry:

If you removed a horn it is easy to put back the right one, but then you need to get it aligned properly. There is a lot of information on the website for this including this tutorial: lynxmotion.com/images/html/build111.htm

Note this tutorial takes you to another tutorial that shows you how to run a program to tell the servo to go to the center point.

Good Luck
Kurt

thank you for the help, kurte. but the offset adjustments will have to wait! My BASIC Atom Pro 28 Pin just fried, and i was saving that money for a speakjet chip!!! :imp: :imp: :imp:

droideka227

How do you know you fried a pin?

sorry, i used “fried” as a catch all phrase. what i really meant to say was one of the metal pins broke off. Anyway, its useless now :cry:

Sounds like time to get motivated and repair or modify it so it can be used.

yes, i am gonna modify my brat. and by modify, i mean change it to autonomous :smiley: