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Posted (edited)

Nice app, few things I noticed:

How do you remove the gears?

Torque is set as 14N/cm in RC motor for fast and slow output, which is not correct.

I would rename 1 to worm gear.

 

Edited by Zerobricks
Posted
1 hour ago, Zerobricks said:

How do you remove the gears?

You don't yet because I didn't feel the need for such an option myself. But since it's needed, I will figure out how to add it shortly.

What's the correct torque? I'm thinking about the images.

Posted

Thanks for this app, I love how mamy types of motor and gears are here.

One request: can we have support for compound gears as well as linear gears?

linear could be something like 8+24+8+24

compound would be

8+24 & 8+24

& means the 24 and 8 is on the same axle.

Regards, Snipe.

Posted
12 hours ago, Sariel said:

You don't yet because I didn't feel the need for such an option myself. But since it's needed, I will figure out how to add it shortly.

What's the correct torque? I'm thinking about the images.

RC motor has a 17:23 gear ratio, so the torque on the inner axle should be around 10,3 Ncm

Posted

Thanks Zerobricks. App update 1.3 should be online inside 1 hour, among other fixes I've managed to stretch the app compatibility down all the way to Android 4.4. Anyone should be able to run it now.

Posted
1 minute ago, Aleh said:

Sariel, do you plan to deploy it on iOs platform?

No. Sorry but I'm just one guy and if I have to learn programming for mobile devices then one system is enough to keep me busy and for obvious reasons I'm going with the system that has 75% of the market, not 20%.

Posted

Looks like a very useful tool, thanks Sariel. 

Would it be easy to add a visual display of the theoretical rpm, perhaps by having a spinning wheel or lift arm or something?

Posted
8 hours ago, allanp said:

Would it be easy to add a visual display of the theoretical rpm, perhaps by having a spinning wheel or lift arm or something?

Not easy and not so useful, I think. Human eye isn't going to be able to tell 300 RPM from 400 RPM anyway.

8 hours ago, SNIPE said:

I did a bug :)

edit: never mind, I updated and it appears to be fixed :)

It's not a bug and it wasn't fixed. If you feel the need to try the biggest number possible, the app will let you. Have fun.

Posted

App is not that bad at all....  @SarielIt would be cool to see if you can use the app to use the camera of your cell phone and use it to capture the RPM of a shaft like the Strobe tachometer (RPM meter) app..   

  • 2 weeks later...
Posted

Thanks for the excellent app! I have used your web site for many years is it also possible to add the Gear coupler section as well? I find it really useful in working out what will fit.

Posted

I seem to be experiencing a bug. To replicate, try:

- select any motor (say PF M)

- select any gears on first row (say 8t driver and 8t follower)

- select differing gears on second row (say 8t driver and 16t follower)

Result (using latest updates): upon selecting the second follower gear, RPM shoots up from 405 to 3164.

When I first tried the app in early December RPM was calculated correctly, but now it seems way off.

Aside from the RPM issue, it's a great and useful app!

  • 4 weeks later...
Posted (edited)

Hello, @Sariel

I found some strange bug:

49379215736_c48f558211_b.jpg   49379215731_e8d291cd46_b.jpg

If torque of single C+ XL motor = 22 N*cm, then with 36:12 gear ratio and planetary hub it should be 39.6, not 1425.6 N*cm
There are x36 multiplier somehere in a code, which is exactly teeth number of the first gear used in the app on the screenshot. Maybe this would be helpful

Edited by SilenWin
  • 2 weeks later...
  • 1 month later...
Posted

I just installed the App, very neat, thank you very much!

Is it possible to implement half stud steps for gear combos? e.g.: 1 stud up and 1,5 stud away, a 20t and a 8t gear mesh nicely.

  • 5 months later...
Posted
On 3/8/2020 at 11:49 AM, Parazels said:

Could you add battery blocks to your Lego@motor specs application?

I'm not sure what you mean by battery blocks but there has been a bunch of updates to my app:

  • you can now select voltage the motor is running at for calculations (is that what you meant?)
  • you can add you own custom gears with any number of teeth for use in standard and planetary calculations
  • when you select a pair of gears that are impossible to mesh together, that pair will be marked red but you still get the ratio
  • the app includes Gearcyclopaedia describing all LEGO gears, differential gears and turntables in detail
  • added gear coupler for both beams and bricks

The app is still free and ad-less, naturally. You can download/update here: https://play.google.com/store/apps/details?id=pl.sariel.brickgearratiocalculator

Posted (edited)
16 hours ago, Sariel said:

I'm not sure what you mean by battery blocks but there has been a bunch of updates to my app:

  • you can now select voltage the motor is running at for calculations (is that what you meant?)
  • you can add you own custom gears with any number of teeth for use in standard and planetary calculations
  • when you select a pair of gears that are impossible to mesh together, that pair will be marked red but you still get the ratio
  • the app includes Gearcyclopaedia describing all LEGO gears, differential gears and turntables in detail
  • added gear coupler for both beams and bricks

The app is still free and ad-less, naturally. You can download/update here: https://play.google.com/store/apps/details?id=pl.sariel.brickgearratiocalculator

There is written 7/9V at PF motors, but I can't understand, which battery blocks provide the voltages.

What is the difference between 7 and 9 V and how can I get max power?

Edited by Parazels

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