Search found 1594 matches
- Fri Oct 14, 2016 9:09 am
- Forum: Velocity and Position Control
- Topic: Quadrature Encoder Positon Powerup value
- Replies: 9
- Views: 12609
Re: Quadrature Encoder Positon Powerup value
Correct. QPPS is a hold over from a long time ago. I prefer to think of it as counts of the edges of the quadrature pulses.
- Thu Oct 13, 2016 9:24 am
- Forum: Velocity and Position Control
- Topic: Quadrature Encoder Positon Powerup value
- Replies: 9
- Views: 12609
Re: Quadrature Encoder Positon Powerup value
Roboclaw counts each edge of each quadrature pulse on each signal line so 4 counts per period.
QPPS is the maximum speed of the encoder/motor in counts per second.
QPPS is the maximum speed of the encoder/motor in counts per second.
- Wed Oct 12, 2016 9:09 am
- Forum: Velocity and Position Control
- Topic: Quadrature Encoder Positon Powerup value
- Replies: 9
- Views: 12609
Re: Quadrature Encoder Positon Powerup value
1. No, the Roboclaw does not keep track of the quadrature count between power cycles. In order for a quadrature encoder to be used as an absolute position sensor you will need to keep the system powered at all times if there is any possibility of external forces moving the encoder. Note the roboclaw...
- Tue Oct 11, 2016 9:50 am
- Forum: General Discussion
- Topic: Old RoboClaws... what library should I be using?
- Replies: 5
- Views: 6386
Re: Old RoboClaws... what library should I be using?
The firmware on your roboclaw is very old. Our changes file doesnt go back that far anymore. The command number hasnt changed though so you should get some data back. Very old firmware had an 8bit value for the current, while the newer ones have a 16bit value. Also the 8bit value was very low resolu...
- Tue Oct 11, 2016 9:46 am
- Forum: Velocity and Position Control
- Topic: Quadrature Encoder Positon Powerup value
- Replies: 9
- Views: 12609
Re: Quadrature Encoder Positon Powerup value
Yes, that is one way of doing it. Also you can setup the S4 and S5 pins(for channels 1 and 2 respecively) as Home signal imputs. Then the home signals trigger(eg get pulled low) the respecitive encoder count will be reset to 0. The Home signals will also stop the motors when the motors are moving in...
- Fri Oct 07, 2016 9:18 am
- Forum: General Discussion
- Topic: Packet Serial Mode: Multiple Motor Controllers
- Replies: 14
- Views: 18390
Re: Packet Serial Mode: Multiple Motor Controllers
Thanks for the diagram. There is no reason I can see that adding a 2.2k pullup to 3.3v would damage the XBee. I think maybe you will need to talk to the XBee people about whay could cause that. Also make a diagram showing the multiple roboclaw wiring just to be sure. Just to be clear, it is not poss...
- Fri Oct 07, 2016 9:11 am
- Forum: Velocity and Position Control
- Topic: Question about using roboclaw v5 with arduino uno r3
- Replies: 1
- Views: 4073
Re: Question about using roboclaw v5 with arduino uno r3
It takes longer to update the manual than it does to update the example code included with the arduino library. We are in the process of updating the manual now. But in general the examples in the arduino library will always be more up to date than the manual examples. We recently changed the arduin...
- Thu Oct 06, 2016 9:01 am
- Forum: General Discussion
- Topic: Packet Serial Mode: Multiple Motor Controllers
- Replies: 14
- Views: 18390
Re: Packet Serial Mode: Multiple Motor Controllers
It should not have damaged the XBee pin at all. The Roboclaw in the worst case can only ouptut 3.3v maximum on an I/O and if the pullup was to 3.3v as well then there is no way the pin would have gone higher than 3.3v(the usualy cause of I/O damage is over voltage). Make sure you have a common groun...
- Thu Oct 06, 2016 8:56 am
- Forum: General Discussion
- Topic: Erratic behavior in ttl with arduino MEGA
- Replies: 1
- Views: 3128
Re: Erratic behavior in ttl with arduino MEGA
What baudrate are you using? What arduino pins are you using to communicate? Are you using software serial or hardware serial?
- Thu Oct 06, 2016 8:55 am
- Forum: General Discussion
- Topic: How can i control speed with an quadrature encoder and arduino?
- Replies: 0
- Views: 3282
Re: How can i control speed with an quadrature encoder and arduino?
If you have the hardware already please call our support line. We will walk you though using the Ion Motion application on a Windows PC to setup the board for use with an encoder.