anyone can help me find out how fast a spike/powered up hub's gyro can spin? 
i asked lego service 
We're sorry for not replying sooner.

According to our relevant team, we're unable to provide the technical specifications you requested because it's not sharable information.

However, we love to share some useful information for your LEGO creations. 

Please go to the following link and download PDF file of Large Hub: 
https://education.lego.com/en-us/product-resources/spike-prime/downloads/technical-specifications
 
Also, there are a lot of blogs and forums discussing the technical specification and their insight. The following link is one of it. I wish you like it.
https://thecodingfun.com/2021/03/22/lego-spike-prime-explanation-of-accelerometer-data-and-line-graph-analysis/

Hope this helps!


if anyone has info on the speed of the gyro in spike/robot inventor and powered up thanks!

  On 12/9/2022 at 8:22 PM, glowytheglowbug said:

anyone can help me find out how fast a spike/powered up hub's gyro can spin? 
i asked lego service 
We're sorry for not replying sooner.

According to our relevant team, we're unable to provide the technical specifications you requested because it's not sharable information.

However, we love to share some useful information for your LEGO creations. 

Please go to the following link and download PDF file of Large Hub: 
https://education.lego.com/en-us/product-resources/spike-prime/downloads/technical-specifications
 
Also, there are a lot of blogs and forums discussing the technical specification and their insight. The following link is one of it. I wish you like it.
https://thecodingfun.com/2021/03/22/lego-spike-prime-explanation-of-accelerometer-data-and-line-graph-analysis/

Hope this helps!


if anyone has info on the speed of the gyro in spike/robot inventor and powered up thanks!

I would like to know how fast a lego mindstorms Spike/robot inventor hub's gyro is (for example it says ev3's gyro is 440 degrees per second and is there a difference between spike/robot inventor and powered up's technic hub or spike essential?
 

im currently making a lego meltybrain robot aka a robot that stops and starts its 2 drive motors while spinning aka translational drift to make it move in any direction
(this is the original question) 

  On 12/1/2022 at 7:19 AM, Jundis said:

@Technic tango Sadly I don't have time right now to tinker, but this motion could be done by a linkage system with 2 swing arms of different lengths. As one of my profs in technical mechanics once said: Nearly every movement can be replicated by a clever 4 linkage system.

I used this on my Transformation Vehicle also:

In your case, the links maybe should cross to gain the angle changing movement. If the caterpillar drive should lift the vehicle, you definetely need the big LAs.

I figured it just trying random things, it isnt perfect, but i cant fit any large linkages in the area so this will have to do. The area above the tires is free space anyways https://streamable.com/d7cvnc

Edited December 11, 20222 yr by Technic tango
Inserted link

im trying to run a model that is about 250g so far, and testing it with different motors. every motor I've tested, has smelled bad nearly instantly after connecting it to the driveshaft.  The gear ratio is 15:1 through a series of many 12, 20 and 24 tooth gears. is there a solution to this? i tested m motors, xl motors, L motors, and buggy motors, both with a buwizz and with a normal lego batter box to the same effect.

 

You are gearing up?

OK, maybe You will get motor powerfull enough (bugy motor), but then You will ruin gears pretty fast.

  On 12/12/2022 at 5:47 AM, Jurss said:

You are gearing up?

OK, maybe You will get motor powerfull enough (bugy motor), but then You will ruin gears pretty fast.

i have tested it extensively, the only problem is the motors get smelly

 

Question:

Do you intend to lift the vehicle up with the tracks and drive it or just use em for visuals?

The mechanism you are using isn't exaclty what I meant, plz look at the scheme again: There are 4 rigid rods/liftarms, the movement itself (and therefor the linear actuator) has to be attached to this mechanism.

Do you have an .io file of your model? Maybe I can work something out...?

  On 12/12/2022 at 5:54 AM, Technic tango said:

i have tested it extensively,

Now limiting part is motor, You just haven't run it enough. long to damage gears. With better, more powerful motor also start won't be so soft.

  On 12/12/2022 at 7:38 AM, Jundis said:

Question:

Do you intend to lift the vehicle up with the tracks and drive it or just use em for visuals?

The mechanism you are using isn't exaclty what I meant, plz look at the scheme again: There are 4 rigid rods/liftarms, the movement itself (and therefor the linear actuator) has to be attached to this mechanism.

Do you have an .io file of your model? Maybe I can work something out...?

I do intend to lift up the vehicle and have since changed to pneumatics. I dont have an io file as of now, but there will be one in the future.  Im not entirely sure, but a large linkage system like the one you describe would likely not be possible with the bounds space that i have available because of the fact it is on a bogey and there is a driveshaft directly behind it. I will definitely send an io file once i make it if you would like to try something though

 

 

Edited December 12, 20222 yr by Technic tango

  On 12/12/2022 at 7:38 AM, Jundis said:

Question:

Do you intend to lift the vehicle up with the tracks and drive it or just use em for visuals?

The mechanism you are using isn't exaclty what I meant, plz look at the scheme again: There are 4 rigid rods/liftarms, the movement itself (and therefor the linear actuator) has to be attached to this mechanism.

Do you have an .io file of your model? Maybe I can work something out...?

https://bricksafe.com/files/mcneds/wip-mocs/lego ponsse.io heres an io file for it that I made today

  On 12/14/2022 at 8:29 AM, Technic tango said:

https://bricksafe.com/files/mcneds/wip-mocs/lego ponsse.io heres an io file for it that I made today

I'll see what I can do :D

One question: Are the tracks meant to be driven?

  On 12/14/2022 at 6:02 PM, Jundis said:

I'll see what I can do :D

One question: Are the tracks meant to be driven?

Yes, and so far im just gonna shove a geared xl motor inside it because i havent figured out a reliable deployment mechanism yet

  On 12/14/2022 at 9:03 PM, Technic tango said:

Yes, and so far im just gonna shove a geared xl motor inside it because i havent figured out a reliable deployment mechanism yet

Ok this is gonna be even more difficult... Your whole construction is a little fragile, you use many small connectors and not many rigid elements like liftarm frames. Have you tested the suspension, if it holds all the weight?

I would place the motor in the middle and use a chain drive for one of the big sprockets. Driving the small sprocket would be nice, but may lead to skipping of the track.

  On 12/15/2022 at 1:23 PM, Jundis said:

Ok this is gonna be even more difficult... Your whole construction is a little fragile, you use many small connectors and not many rigid elements like liftarm frames. Have you tested the suspension, if it holds all the weight?

I would place the motor in the middle and use a chain drive for one of the big sprockets. Driving the small sprocket would be nice, but may lead to skipping of the track.

the whole system is actually fine, i powered it with a buggy motor gearbox and there were no cracking gears, even when I drove it into a corner, which forced off the tape on the sidewall of the tire and rims.  I also agree that powering the top sprocket wouldn't be that effective, I just put it there for tension

  On 12/15/2022 at 11:22 PM, Technic tango said:

the whole system is actually fine, i powered it with a buggy motor gearbox and there were no cracking gears, even when I drove it into a corner, which forced off the tape on the sidewall of the tire and rims.  I also agree that powering the top sprocket wouldn't be that effective, I just put it there for tension

Can you estimate the weight of the whole vehicle? I got a little time on the weekend or next week to look for a mechanism.

 

  On 12/16/2022 at 10:23 AM, Jundis said:

Can you estimate the weight of the whole vehicle? I got a little time on the weekend or next week to look for a mechanism.

 

one axle pair is about 1kg so x2, the gearbox is 400g with 2 buggy motors, 2 buwizzes are 130g and I will also be having a powered up hub, 2 pu l motors, a pneumatic crane, 2 more buggy motors for a large pump (can supply pneumatics for the linkage) and body work so I estimate maybe 4-5kg

Good evening Eurobricks  I am having a go at a forklift. So far I've got 4 C section arms that sit inside each other and a slider where the forks will sit driven by a string and pulleys. My belief is that driving the string drum will lift the forks but I don't want to rely on gravity to lower them. Is there a super simple solution? 

Edit: In the skilfully labeled picture above the bottom pulley labelled "bottom arm" is of course connected to the top arm.

Edited December 18, 20222 yr by ukbajadave

I guess that the simplest solution would be to add a rubberband at the bottom that will pull the fork back down.

or make some loop from rope

  On 12/12/2022 at 7:38 AM, Jundis said:

Question:

Do you intend to lift the vehicle up with the tracks and drive it or just use em for visuals?

The mechanism you are using isn't exaclty what I meant, plz look at the scheme again: There are 4 rigid rods/liftarms, the movement itself (and therefor the linear actuator) has to be attached to this mechanism.

Do you have an .io file of your model? Maybe I can work something out...?

Is this what you meant? It works pretty well.Deployable tracks demonstration

  On 12/18/2022 at 10:01 PM, Davidz90 said:

I guess that the simplest solution would be to add a rubberband at the bottom that will pull the fork back down.

Total rise is around 50 studs so not sure an elastic band would have that much stretch.

  On 12/19/2022 at 5:04 AM, Jurss said:

or make some loop from rope

Having slept on it I think the solution might be a second drum of string attached to the bottom. As the lifting string goes around 3 pulleys in order to extend the arm (apparently called the mast) I'm guessing the bottom string will need a 4:1 ratio?

  On 12/19/2022 at 7:33 AM, ukbajadave said:

Total rise is around 50 studs so not sure an elastic band would have that much stretch.

Good point. It would have to be a long elastic band that goes around some pullley and back up.

  On 12/19/2022 at 5:33 AM, Technic tango said:

Is this what you meant? It works pretty well.Deployable tracks demonstration

Yep :-)

Looks good so far, but I really recommend to redo the chassis with liftarm frames to get a more rigid structure with less connectors ;-)

  On 12/20/2022 at 8:19 AM, Jundis said:

Yep :-)

Looks good so far, but I really recommend to redo the chassis with liftarm frames to get a more rigid structure with less connectors ;-)

The reason the ends arent frames is because of the 12t to 24t gearing needing to be placed between frames,  and more importantly, the tatra suspension would have to be placed in the center of the frame.  I have made the replacement strong enough to not warp under immense force so i think it should be fine. There is no shifting of any parts under load across the whole model so far

 

After adding its very needed headlights, I've spent days trying to move the Ferrari Daytona SP3's "pop-up headlight" panels 3 studs back to match that of the actual car (with some extra red panels to enhance the flow from the front bumper to each fender) and have had no luck finding a reliable and Lego-legal (no bending) solution after several attempts . (Also trouble finding a way for it to fit)

Could someone please offer me some assistance? The set desperately needs this facelift.

 

Edited December 21, 20222 yr by StudWorks