Search found 10 matches

by cjr
Wed Jun 05, 2019 12:07 am
Forum: Velocity and Position Control
Topic: Position Control jitters around target position
Replies: 7
Views: 1241

Re: Position Control jitters around target position

Oh, about the hunting: The target position is reached exactly, then it is stable for maybe 200-300 ms, then it jumps 100-200 steps away and crawls back to the target. Then the cycle starts anew, only in the other direction. It does not stay long enough in the deadzone to stop the movement. At least ...
by cjr
Wed Jun 05, 2019 12:04 am
Forum: Velocity and Position Control
Topic: Position Control jitters around target position
Replies: 7
Views: 1241

Re: Position Control jitters around target position

Thank You. Yes, we definitively have some backslash, we know this also from our older motors and controllers. Everywhere we allow some amount of being not-exactly-on-target-position, so no problem here. I was under the impression that the RoboClaw stops the movement as soon as it is for some amount ...
by cjr
Wed Jun 05, 2019 12:01 am
Forum: General Discussion
Topic: Solo: Confused about SetPinFunctions and S2 ... S5 Modes and Firmware 4.1.33
Replies: 4
Views: 773

Re: Solo: Confused about SetPinFunctions and S2 ... S5 Modes and Firmware 4.1.33

Great. Still, i would like to know if i'm correct about the switches: Physical S3 is S4 in the API? S5 in the API is not used for the Solo? S3 in the API is what? Can't be S2-Physical because that is the Serial, yes? Can't be S4-API because that is S3-Physical, yes? Why do i have to set S3-API if it...
by cjr
Tue May 28, 2019 8:28 am
Forum: General Discussion
Topic: Solo: Confused about SetPinFunctions and S2 ... S5 Modes and Firmware 4.1.33
Replies: 4
Views: 773

Re: Solo: Confused about SetPinFunctions and S2 ... S5 Modes and Firmware 4.1.33

Update: 4.1.29: SIGTYPE_LIMIT alone stopped in both directions SIGTYPE_LIMIT | SIGFLAG_FORWARD stopped in forward direction SIGTYPE_LIMIT | SIGFLAG_BACKWARD stopped in backward direction SIGTYPE_LIMIT | SIGFLAG_FORWARD | SIGFLAG_BACKWARD stopped in neither direction 4.1.33: SIGTYPE_LIMIT alone stops...
by cjr
Tue May 28, 2019 7:13 am
Forum: General Discussion
Topic: Solo: Confused about SetPinFunctions and S2 ... S5 Modes and Firmware 4.1.33
Replies: 4
Views: 773

Solo: Confused about SetPinFunctions and S2 ... S5 Modes and Firmware 4.1.33

Hello everybody, we just went from 4.1.29 to 4.1.33. The "Limit Switches" or E-Stop are no longer working as before. Reading the Datasheet and User Guide leaves me in utter confusion :D. The Device is a RoboClaw Solo 30A, packet serial, communication is over USB only. I have a linear movement with t...
by cjr
Tue May 28, 2019 6:59 am
Forum: Velocity and Position Control
Topic: Position Control jitters around target position
Replies: 7
Views: 1241

Re: Position Control jitters around target position

The "next week" thing never happened, but a colleague did some tests and optimizations and a different encoder and the movement is now good enough for the moment.
by cjr
Thu Mar 14, 2019 10:38 am
Forum: Velocity and Position Control
Topic: Position Control jitters around target position
Replies: 7
Views: 1241

Re: Position Control jitters around target position

Thank You for this information. I will try this next week when i'm back at the machine.
by cjr
Thu Mar 07, 2019 9:03 am
Forum: Velocity and Position Control
Topic: Position Control jitters around target position
Replies: 7
Views: 1241

Position Control jitters around target position

Next question ;) Again using Command 65, i'm moving to some target position. Works so far, deccelerates, crawls to target (depending on Ki and MaxI). As soon as the Target position is reached (the position error changes its sign), RoboClaw suddenly speeds up a little bit, overshooting the target (e....
by cjr
Thu Mar 07, 2019 8:55 am
Forum: Velocity and Position Control
Topic: Command 65 (Buffered Drive M1 with signed Speed, Accel, Deccel and Position) always moves to 0
Replies: 2
Views: 650

Re: Command 65 (Buffered Drive M1 with signed Speed, Accel, Deccel and Position) always moves to 0

Looks like some parameter problem. Now that i have set a valid min and max position it works.
by cjr
Fri Mar 01, 2019 3:37 am
Forum: Velocity and Position Control
Topic: Command 65 (Buffered Drive M1 with signed Speed, Accel, Deccel and Position) always moves to 0
Replies: 2
Views: 650

Command 65 (Buffered Drive M1 with signed Speed, Accel, Deccel and Position) always moves to 0

Hello everybody, i have a USB Roboclaw Solo 30A v4.1.29 I use it from Linux with a "port" of the arduino library (basically removed AVR things and adopted serial I/O) Reading status, sending parameters, driving with constant speed, stopping works. Problem: I'm trying to move from e.g. position 61865...