 | | Re: Adder/Subtractor revisited —David Harry
|
| | | In article <36B6F795.4B9310A6@n...a.kth.se>, johannes@nada.kth.se says... (...) Ingenious as it is, this thread and previous similar ones have pointed out the primary problems with the A-S drive approach: power transmission through the LEGO (...) (26 years ago, 6-Feb-99, to lugnet.robotics)
|
| | | |
| | | | | Re: Adder/Subtractor revisited —Jim Moran
|
| | | | | That sounds very interesting. I hope to see some diagrams or photos soon... Your approach solves the biggest problem introduced by the A-S drive, that of insufficient torque when driving tracks. Two motors is the way to go for tracks. -- SeeYa ! (...) (26 years ago, 6-Feb-99, to lugnet.robotics)
|
| | | | | |
| | | | | | | Re: Adder/Subtractor revisited —David Harry
|
| | | | | | In article <F6psw8.Bxy@lugnet.com>, cyberia@erols.com says... (...) Yes, this is the feature that really worked out well. By changing one gear (and adding appropriate number of 1/3 thickness shim plates under the motor), one can get the following (...) (26 years ago, 6-Feb-99, to lugnet.robotics)
|
| | | | | | |
| | | | | Re: Adder/Subtractor revisited —Bryan Beatty
|
| | | | (...) Actually, I've had pretty good luck with independently driven left and right drive trains; I haven't had a lot of problems with robots curving when I want them to go straight. I find the adder/subtracter useful for a different reason: it makes (...) (26 years ago, 6-Feb-99, to lugnet.robotics)
|
| | | | |
| | | | | | Re: Adder/Subtractor revisited —David Harry
|
| | | | (...) Here's what I do and it works quite well. I have added a "partial duty cycle" mode to my motor control system. Basically I intermitantly turn off the motor for a very small increment of time. The time-average of a properly synchronized (...) (26 years ago, 7-Feb-99, to lugnet.robotics)
|
| | | | |
| | | | | | Re: Adder/Subtractor revisited —Jim Moran
|
| | | | | A nit, but you meant 75% duty cycle, no (or reversed your terms) ? -- SeeYa ! ---...--- Jim ---...--- Hello... Is this thing on ? David Harry wrote in message ... (...) (26 years ago, 7-Feb-99, to lugnet.robotics)
|
| | | | | |
| | | | | | Re: Adder/Subtractor revisited —Bryan Beatty
|
| | | | (...) [snip] (...) I actually had already tried that, and couldn't get to work in these particular circumstances. I couldn't get the robot to turn off the motor for any period briefer than 50 ms, and even that short a period (coupled with setting (...) (26 years ago, 7-Feb-99, to lugnet.robotics)
|
| | | | |
| | | | | | Re: Adder/Subtractor revisited —Dan B.Brockman
|
| | | | There is a company in Chicago that does a lot with small motors; it's named Bodine Electric, and of course they have a web site at (URL) I can tell the motors in the RCX sets operate with pulse width modulation to control power. Bodine's site gives (...) (26 years ago, 7-Feb-99, to lugnet.robotics)
|
| | | | |
