 | | new Mindstorms servos? —Joe Strout
|
| | | Christmas comes in August this year! Does anyone have any images or information about the upcoming servos? How big are they, what do they look like, what's their torque and speed? Will we be seeing LEGO Robo-Ones in the next year? Thanks, — Joe (18 years ago, 7-Jan-06, to lugnet.robotics, FTX)
|
| | | |
| | | | | Re: new Mindstorms servos? —Matthew Ruschmann
|
| | | | (...) (URL) Huge image! Judging by that picture and others, a motor is about half the size of the NXT brick (which is claimed to be about the size of the RCX). Who knows about torque and all. I am guessing the characteristics are about the same as (...) (18 years ago, 7-Jan-06, to lugnet.robotics, FTX)
|
| | | | |
| | | | | | Re: new Mindstorms servos? —steve
|
| | | | | (...) Dunno - I think it's *WAY* different. It's almost as if it were DESIGNED for making the robots that are in all the photos. It looks quite inconvenient for building wheeled or tracked vehicles because of how the drive shaft exits at right (...) (18 years ago, 7-Jan-06, to lugnet.robotics)
|
| | | | | |
| | | | | | | Re: new Mindstorms servos? —Dean Earley
|
| | | | | | | (...) From the picture, that is connected as an input, and the video posted by Yann shows this rotating under NXT control. It looks to me like it can be EITHER a rotation sensor or motor, but not both.... (18 years ago, 7-Jan-06, to lugnet.robotics)
|
| | | | | | | |
| | | | | | | | | Re: new Mindstorms servos? —Yann Vernier
|
| | | | | | | | (...) I spotted somewhere a mention of closed-loop controllers, which would mean that the motor *is* the rotation sensor. I expect the handle was installed to make it easier to manually adjust and test the mechanism and that the rotation sensing (...) (18 years ago, 7-Jan-06, to lugnet.robotics)
|
| | | | | | | | |
| | | | | | | Re: new Mindstorms servos? —danny staple
|
| | | | | | (...) Hi Steve, I disagree here. Going at right angles, along with the gear reduction makes it much easier for me to build tracked or wheeled vehicals. Even more so when the odometry is taken care of. (...) That is excellent - additional torque on (...) (18 years ago, 11-Jan-06, to lugnet.robotics)
|
| | | | | | |
| | | | | | | | RE: new Mindstorms servos? —Russell C. Brown [RR-1]
|
| | | | | | (...) micromotor assembly, then this is probably a space saving. And it is most definately a saving in complexity. Hmm... If the rotation sensor is directly connected to the motor, then it can't detect rotation when the motor slips (e.g., you've got (...) (18 years ago, 14-Jan-06, to lugnet.robotics)
|
| | | | | | |
| | | | | | Re: new Mindstorms servos? —Yann Vernier
|
| | | | (...) I'd say quite a bit of torque. It's possible they sacrificed some speed compared to the recent minimotors. Check out the tail of the "Sting" model, in the video clip at (URL). The rendered image of that model at (URL) shows quite clearly that (...) (18 years ago, 7-Jan-06, to lugnet.robotics, FTX)
|
| | | | |
| | | | | | Re: new Mindstorms servos? —Mark Bellis
|
| | | | (...) The speed of the motor attached to another robot in the video shows that its speed is significantly slower than the 71427 motors supplied with the RCX 1.0 to 2.0. I suggest more like 60-100rpm rather than 300. This gives more torque for the (...) (18 years ago, 7-Jan-06, to lugnet.robotics, FTX)
|
| | | | |
| | | | | | Re: new Mindstorms servos? —Juergen Stuber
|
| | | | Hi, (...) in the video I counted about eight revolutions in 5 seconds, that would put it at about 96 rpm. Jürgen (18 years ago, 8-Jan-06, to lugnet.robotics)
|
| | | | |
| | | | | | Re: new Mindstorms servos? —Brian Davis
|
| | | | | (...) Although I think there's two things to watch out for here. First, if you have continuous monitoring of the encoders, you could have speed control (in other words, the speed in the video may not be the maximum, but something less). Second, (...) (18 years ago, 8-Jan-06, to lugnet.robotics)
|
| | | | | |
| | | | | | Re: new Mindstorms servos? —steve
|
| | | | The problem with gearing down motors in order to exchange RPM for torque is that if you actually NEED RPM rather than torque then you have to gear them back up again. If you have a high RPM motor to start with, you have to gear it down in order to (...) (18 years ago, 9-Jan-06, to lugnet.robotics)
|
| | | | |
| | | | | | Re: new Mindstorms servos? —Ignacio Martinez Vazquez
|
| | | | | (...) snippy (...) Maybe your complaint is the excessive gearing of the new motor, but otherwise it makes no sense, because the RCX motors are geared too. They are targeted to the vast majority of uses, so most people won't need big geartrains in (...) (18 years ago, 9-Jan-06, to lugnet.robotics)
|
| | | | | |
| | | | | | Re: new Mindstorms servos? —John Barnes
|
| | | | | (...) I beg to differ. The origninal technic motor was ungeared. It was bad because the first thing it did was try to power unlubed high friction gears. At least with enclosed, lubed close tolerance gears, there's a lot less friction in the gear (...) (18 years ago, 9-Jan-06, to lugnet.robotics)
|
| | | | | |
| | | | | | | RE: new Mindstorms servos? —Russell C. Brown [RR-1]
|
| | | | | | (...) need higher rpm. (...) In fact, doesn't the different connector on the NXT say I can't? Nothing we've seen yet suggests that the NXT can talk to the RCX or any of its motors or sensors. --Russ (18 years ago, 14-Jan-06, to lugnet.robotics)
|
| | | | | | |
| | | | | | | | RE: new Mindstorms servos? —Russell C. Brown [RR-1]
|
| | | | | | (...) used with the NXT brick". Doh! Never mind... --Russ -----Original Message----- From: Russell C. Brown [RR-1] [mailto:rcbrown@austin.rr.com] Sent: Friday, January 13, 2006 10:40 PM To: lego-robotics@crynwr.com Subject: RE: new Mindstorms (...) (18 years ago, 14-Jan-06, to lugnet.robotics)
|
| | | | | | |
| | | | | | | | Re: new Mindstorms servos? —Dennis Clark
|
| | | | | | (...) This does point to a concern that I have. I'm wondering if the Bluetooth interface replaces the IR comm link that the RCX used to send messages back and forth between other RCX bricks. I don't know Bluetooth so I don't know if it is (...) (18 years ago, 15-Jan-06, to lugnet.robotics)
|
| | | | | | |
| | | | | | | | Re: new Mindstorms servos? —danny staple
|
| | | | | | | (...) Hi Dennis, Interesting to see you posting here too (there cant be that many Dennis Clark aka DLC's in robotics). You will be happy to hear I am a proud new owner of your book. Anyway - If there is a conversion cable, I have certainly hear of (...) (18 years ago, 20-Jan-06, to lugnet.robotics)
|
| | | | | | | |
| | | | | | | | | Re: new Mindstorms servos? —Steve Hassenplug
|
| | | | | | | | (...) (as you may have seen in the WIRED story) I can not possibility convey to you how much we wanted more motor ports. And we told them. Really. I mean, really, we did. We told them so often, I think we started to annoy them. Here's the problem. (...) (18 years ago, 20-Jan-06, to lugnet.robotics)
|
| | | | | | | | |
| | | | | | | | | | Re: new Mindstorms servos? —David Koudys
|
| | | | | | | | | In lugnet.robotics, Steve Hassenplug wrote: <snip> (...) Again, expect a huge hug from me when I see you :) This is possibly the best worded post as to why I love my chosen hobby and my personal appreciation of TLC. They might not always implement (...) (18 years ago, 20-Jan-06, to lugnet.robotics)
|
| | | | | | | | | |
| | | | | | | | | | Re: new Mindstorms servos? —Steve Lane
|
| | | | | | | | | In lugnet.robotics, Steve Hassenplug wrote: We don't always agree with their decisions, but you (...) You know, it would be interesting to see their Quality Standard mission statement document, if such a thing exists Steve. (18 years ago, 20-Jan-06, to lugnet.robotics)
|
| | | | | | | | | |
| | | | | | | | | | | Re: new Mindstorms servos? —dan miller
|
| | | | | | | | | | | (...) Three words: "Don't make crap". At least that's how I would put it. (18 years ago, 20-Jan-06, to lugnet.robotics)
|
| | | | | | | | | | | |
| | | | | | | | | | | Re: new Mindstorms servos? —Joshua Delahunty
|
| | | | | | | | | | (...) From the rec.toys.lego Frequently Asked Questions: The LEGO motto: Det bedste er ikke for godt. (Only the best is good enough.) Actually a word-by-word translation would be, "The best is not too good" - in which "not too good" parses nicely (...) (18 years ago, 21-Jan-06, to lugnet.robotics)
|
| | | | | | | | | | |
| | | | | | | | | | | | Re: new Mindstorms servos? —dan miller
|
| | | | | | | | | | (...) How about: "The best is just a starting point." That seems to express the idea in English. (18 years ago, 21-Jan-06, to lugnet.robotics)
|
| | | | | | | | | | |
| | | | | | | | | | Re: new Mindstorms servos? —danny staple
|
| | | | | | | | (...) Dont forget sensor ports too though! I have been in many situations where more motor, or sensor ports or both would have been very handy. (...) Understood Steve - and real kudos to you for putting it so well. You know what would really go down (...) (18 years ago, 20-Jan-06, to lugnet.robotics)
|
| | | | | | | | |
| | | | | | | | Re: new Mindstorms servos? —Steve Bliss
|
| | | | | | (...) That does seem to be the case. (...) I'm 99% sure I've seen this addressed in the NXT material. Either in the press releases, the educational features, or the application for the 100 NXT advance program. (...) Yes, but I'm confident someone (...) (18 years ago, 20-Jan-06, to lugnet.robotics)
|
| | | | | | |
| | | | | | Re: new Mindstorms servos? —Brian Davis
|
| | | | (...) And the problem with not gearing down the motors is that for anyhting requiring more than the motors "native" torque, you have to gear them down with those inefficient plastic gears. (...) That assumes that all possible torque/speed (...) (18 years ago, 9-Jan-06, to lugnet.robotics)
|
| | | | |
