Have you tried using the DEScribe software without the kangaroo? i haven't used it yet, but it claims to handle ramping.
Also if you are using a standard radio transmitter, depending on model, you may be able to adjust the response curve on that.
Mike H
I will likely abandon the kangaroo on the drive motors idea in the name of expediency this year. I have been learning a lot about encoders and I am pretty convinced I need more time to optimize their use in the G-Bot s drive section. Thank you for your feedback... er um lol Thanks Dave. Gwen B9-0027
From: B9Builders@yahoogroups.com Sent: Sunday, October 4, 2015 12:14 AM
To: B9Builders@yahoogroups.com Subject: Re: [B9Builders] kangaroo with sabertooth help
Hi Gwen, I actually answered your same question on the EZ Builder forum and included pictures. As I said there let me know the size requirements you need and I'll be happy to help you find the right part number for the right encoder. Here's the link:
http://www.ez-robot.com/Community/Forum/Thread?threadId=8487
Also, I think I stated this in that post that I have not used the Sabertooth/Roo in the manor you're using it but I do know that you will need a feedback device. Another thing I'm worried about is that the Kangaroo needs to be run through a Autotune procedure before you can use it. This involves letting the Roo take control and running the motors through many forward and reverse motions at different speeds. I don't think the top heavy B9 can take abuse like that. However, again, I've never tried an auto tune with the settings your using. The process may be completely different then in the Independent, position mode I use. Here's a YouTube vid of the autotune process I filmed while setting up my Roo used in one of the motors in my B9 arm:
B9 Robot ARS Kangaroo X2 Autotune
I'd suggest you contact DE's customer support and ask these questions. Let them know how you want to use the motor controllers and don't be afraid to send pictures and links to your videos. I've found them to be a little slow to respond but very helpful if your presentent. One more thing. You may not even need a Kangaroo but this little wonder does help with velocity control. With an encoder attached to your motor it can sense when the motor is starting to labor and add the needed power to keep it running at the proper speed. Kinda like your cruise control in your car. Hope This helps and let me know how I can help. Dave Schulpius On Sat, Oct 3, 2015 at 10:16 PM, 'Gwen'
gwen4156@comcast.net [B9Builders] wrote:
Bueller... wow, crickets huh? Has anyone used encoders on a mobile B9 with (or without) a Kagaroo? Trying to figure a way to install some without replacing the CM808-75A motors I am already using... Gwen B9-0027
From: B9Builders@yahoogroups.com Sent: Thursday, October 1, 2015 5:40 AM
To: B9Builders@yahoogroups.com Subject: [B9Builders] kangaroo with sabertooth help
After trying to handle speed ramping for a sabertooth 2x25 controller driving the G-Bot last year with only marginal success, I bought a Kanagroo motion controller in hopes of having it handle the ramping for the differential drive on the G-bot. I want to use it in speed control / RC mode (only dip switch 1 up). The documentation states the kangaroo REQUIRES at least one feedback signal. I am using two wheelchair motors without encoders on them. I am having a little trouble trying to figure out how or where to add feedback for a B-9 robot using differential drive. Two questions: Will the kangaroo work for speed control without feedback with the dip switches set as above? If not, any suggestions on what type of encoders and where/how I might mount them? Any help is appreciated.
Gwen Meunier
B9-0027