[Plugin] SPGears v1.2 - released 12/17/2016

Re: [Plugin] SPGears v1.0

Postby Chrisu02 » Fri Oct 24, 2014 10:34 am

Hy guy`s

I like this plugin and using it for 3D printing long time, but now i need to make some hypoid gears but it seems that it won`t work :(

looking like this:


I tried out serval value`s


My problem is that the helix is straight then the bevel value is 0° but i needs to be curved :|

the next problem is to make them fit together, is it possible to make a differen value (teethsize) as a fixed parameter so the rest of the gear may be calculated to this ?

i`m no programmer so i don`t know if this would even be possible or home much work it would be. ?

Chri
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Chrisu02 
 

Re: [Plugin] SPGears v1.0

Postby jgrundman » Sun Oct 26, 2014 11:21 pm

Chrisu02 wrote:I like this plugin and using it for 3D printing long time, but now i need to make some hypoid gears but it seems that it won`t work :(


Chris,
You are partially correct, it will not make a TRUE hypoid gear. The problem is the helix angle sits at the outside diameter, not the pitch diameter where it is supposed to be. If you can calculate the desired helix angle at the mid-point (pitch diameter) based on the helix angle at the outside diameter, then you might be able to get very close to a true hypoid. Keep in mind that this was never intended for production accuracy (call me short-sighted, if you must) but should work well enough for Sketchy Physics animations. Version 2 is planned to be more accurate, but as noted in a recent post, I'm not making any commitments on when it would be available.

Chrisu02 wrote:My problem is that the helix is straight then the bevel value is 0° but i needs to be curved :|


Try specifying a large bevel angle (70-80 deg.), a decent number of teeth (50-100+) and a medium helix angle (25-45 deg.). With a larger pitch diameter (10") and a smaller face width (3") you'll get a large gear that looks similar what you posted. The bevel angle of the pinion (small gear) is the the difference between the bevel of the large gear and the intersecting angle of the axis of both gears (90 deg. - 70 deg. = 20 deg.). The helix angle is also different on the pinion. I think it is a similar calculation (90 deg. - 35 deg. = 55 deg.), but I'm not positive; I haven't make a hypoid set in a long time. If that does not work, then I suggest looking for gear engineering reference information. That's what I did.

Chrisu02 wrote:the next problem is to make them fit together, is it possible to make a different value (teethsize) as a fixed parameter so the rest of the gear may be calculated to this ?


In order to make a mating gear, it has to have the same diametral pitch [P] (arc length of one tooth and space). You can use gear formulas (via a web search) to figure out how to calculate the dimensions you need to specify a mating gear. Once you've got that figured out, getting them to mesh properly is a bit tricky. I think I had to tweak the helix angle on one of the mating gears to make them mesh better, but again, it's been a while.

Chrisu02 wrote:i`m no programmer so i don`t know if this would even be possible or home much work it would be. ?
[/quote]

Almost anything is possible, but I'm not a strong programmer or an engineer, so for me, it will be a lot of work, hence the uncertainty regarding the release of version 2. However, it (backlash) is on the growing list of changes intended in the revision.
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jgrundman 
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Re: [Plugin] SPGears v1.0

Postby sigskjel » Tue Nov 11, 2014 9:42 pm

Crossed helical gear - shaft angle off
Some time ago I'd modelled an little crossed helical gear to use in some project. This project got skipped, but I'd had the gears made on a 3D printer, just to see how it works. Now SDGear are a really handy plugin for sketchup, number of teeth 26, pressure angle and so forth, and helix angle 45. I'd ordered two of these to make a crossed gear. Now I'd just received the finished gears, but the shaft angle is off by an significant value too! I'd just checked the crossed helical gear math, and that's done correct, two 45 deg. gears make 90 deg shaft angle. Anybody have any idea of what's gone wrong?

Cincerely, Sigmund
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sigskjel 
 

Re: [Plugin] SPGears v1.0

Postby jgrundman » Wed Nov 12, 2014 3:09 pm

sigskjel wrote:Crossed helical gear - shaft angle off


Sig,
You should have tried fitting the "drawn" gears together to check fit before printing. You would have seen that things don't line up properly. The problem is how the gears are drawn, so getting things to mesh correctly requires some trial and error. Sorry for the inconvenience. I've added it to the list of changes.
-J-
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jgrundman 
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Re: [Plugin] SPGears v1.0

Postby mikaelgu » Fri Nov 14, 2014 10:27 am

I just want to say that it's great to see you developing this again! I once used the plugin to design and print a set of bevel gears and I managed to get a set that meshes just fine (I did do a lot of checking in Sketchup before printing though.

Again, thank you for you hard work, it's much appreciated!

Mikael
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mikaelgu 
 

Re: [Plugin] SPGears v1.0

Postby jumpjack » Sat Jun 06, 2015 11:16 am

I think this site could be very interesting for the developer of this plugin:
http://www.epi-eng.com/propeller_reduct ... design.htm
1

jumpjack 
 

Re: [Plugin] SPGears v1.0

Postby jumpjack » Tue Jun 09, 2015 10:35 am

I think an important upgrade (which probably would not require a major upgrade to 2.0) which could be very useful: specifying number of teeth should result in creating gears of different diameter but with same teeth size; this would make it much easier to make "compatible" gears.

(look at http://sites.google.com/site/simgears for the trial of an STL gears generator)
1

jumpjack 
 

Re: [Plugin] SPGears v1.0

Postby rogerphillips » Mon Nov 09, 2015 3:39 pm

Brilliant plugin - I managed to quickly 3D Print a replacement gear for my broken laminator, using this plugin and some extra lines
1

rogerphillips 
 

Re: [Plugin] SPGears v1.0

Postby wimve » Wed Feb 17, 2016 9:58 pm

jumpjack wrote:Has this plug-in been updated? Does it support worms too now?
It would be also amazing if it supported Sketchy Physics...


Good plug-in but I miss the follow up.
Nobody who can pick up the challenge ?

- Repair the inch-mm problem
- create a corresponding worm
- small help

In addition: how do I create a corresponding worm ?
0
Best regards,
Wim
Holland
http://www.petromax.nl/DeBeer.html
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Re: [Plugin] SPGears v1.0

Postby wimve » Tue Mar 01, 2016 12:38 pm

wimve wrote:
jumpjack wrote:Has this plug-in been updated? Does it support worms too now?
It would be also amazing if it supported Sketchy Physics...

Good plug-in but I miss the follow up.
Nobody who can pick up the challenge ?
- Repair the inch-mm problem
- create a corresponding worm
In addition: how do I create a corresponding worm ?


Nobody ?
I especially need some help with making a worm gear.
0
Best regards,
Wim
Holland
http://www.petromax.nl/DeBeer.html
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wimve 
 

Re: [Plugin] SPGears v1.0

Postby CarlMiddle » Sun Dec 04, 2016 9:09 pm

How do you punch a hole through the gear? I've tried several different ways and it just won't do it. I want to 3D print it with a D shape hole to fit my motor but it won't let me!
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CarlMiddle 
 

Re: [Plugin] SPGears v1.0

Postby jumpjack » Mon Dec 05, 2016 11:28 am

The resulting gear is an object: double click it to edit it.
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jumpjack 
 

Re: [Plugin] SPGears v1.2 - released 12/17/2016

Postby jonathonlt » Tue Apr 18, 2017 3:32 pm

MY FIRST POST ATTEMPT ..LONG TERM PROJECT FOR AUTO-MATED TRANSPORT REQUIRING ,GEAR RACK,, I SEE IN YOUR MAGIC LITTLE WINDOW ENTER GEAR DIAMETER or RACK LENGTH ,,AS YET UNABLE TO CREATE A RACK LITTLE TIME ON LINE HENCE ALL DONNA,S TO WIKI PIDIA AND THE KNOWLEDGE AT THE MOMENT JON
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jonathonlt 
 

Re: [Plugin] SPGears v1.2 - released 12/17/2016

Postby jgrundman » Wed Apr 19, 2017 4:57 pm

jonathonlt wrote:MY FIRST POST ATTEMPT ..LONG TERM PROJECT FOR AUTO-MATED TRANSPORT REQUIRING ,GEAR RACK,, I SEE IN YOUR MAGIC LITTLE WINDOW ENTER GEAR DIAMETER or RACK LENGTH ,,AS YET UNABLE TO CREATE A RACK LITTLE TIME ON LINE HENCE ALL DONNA,S TO WIKI PIDIA AND THE KNOWLEDGE AT THE MOMENT JON


Jon,
Sorry, but I never got around to adding racks to this version, and it is not like to happen. BUT, there is good news. I am currently working on a "pro" version that will include both racks and worms, plus many other features and enhancements! I know folks have been waiting a long time for this, but the wait is almost over. I know I've stated before that I was "working on it" and had nothing to show for it, so here's a quick sneak peek...



More detail to follow; very soon. Really. :-)

-J-
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jgrundman 
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Re: [Plugin] SPGears v1.2 - released 12/17/2016

Postby DingBEN » Tue Jun 06, 2017 11:59 am

WIN 7 Pro, SketchUp Pro
Pardon my green-ness, but I installed 1.0 and realized there is now a 1.2
I installed 1.0 via some link here, NOT the ZIP!
I want to install 1.2

1. Where is the 1.2 download link? no download link on that page
or how to install from zip, since the 1.2 zip extracts an .rb file NOT an .rbz!?

2. It recommends to uninstall old versions!? HOW is that accomplished!?
I see nothing in the menus to uninstall extensions.

3. One thing I noticed on 1.0: the handle(cursor) does not want to latch on to the best inferred handle... it seems to snag around it and latch on to any other close point

Thank you.
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DingBEN 
 

Re: [Plugin] SPGears v1.2 - released 12/17/2016

Postby jgrundman » Wed Jun 07, 2017 3:21 pm

DingBEN wrote:1. Where is the 1.2 download link? no download link on that page
or how to install from zip, since the 1.2 zip extracts an .rb file NOT an .rbz!?


The link for v1.2 is at the top of the first page of this thread. To install a .rb plugin, just copy the extracted file into your plugins folder (C:\Users\usernme\AppData\Roaming\SketchUp\SketchUp 2016\SketchUp\Plugins). Restart Sketchup and the plugin should now be listed in "Extension" menu.

DingBEN wrote:2. It recommends to uninstall old versions!? HOW is that accomplished!?
I see nothing in the menus to uninstall extensions.


These earlier versions predate the extension managers, so they are installed & uninstalled manually. To remove the previous version, just open the plugins folder, as noted above, and move/delete the older version.

DingBEN wrote:3. One thing I noticed on 1.0: the handle(cursor) does not want to latch on to the best inferred handle... it seems to snag around it and latch on to any other close point


The plugin does not have any effect on the cursor, so the issue is most likely with Sketchup's limitations working with very small (< 1/64" or 0.39mm) measurements. While programmatically we can work with smaller distances, manual operations using the cursor will not always cooperate. The simplest solution is to scale the model up, make any changes, then scale it back down. It's only a rough workaround, so some geometry may behave unexpectedly when you scale back down.

Keep in mind that Sketchup is CAM (modeling) not CAD (design), so it has some limitations. This is one of them. Another that has frustrated new users is that objects are collections of edges and faces, so curves are not going to perfectly smooth. It's usually not a problem unless you 3D print a model because the curves will be a series of flat faces and edges, making mating surfaces a bit clunky.

Good luck and thanks for trying the SPGears plugin.
1

jgrundman 
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Re: [Plugin] SPGears v1.2 - released 12/17/2016

Postby DingBEN » Thu Jun 08, 2017 6:22 am

Thank you so much for the prompt answer.

YOU MAY WAN TO BE AWARE OF THIS:
Unless I keep a separate record(messy) I have no idea what version is running

- Extensions Menu shows: SPGears_mjg(no version)

so I did this:
- in Plugins folder
/// I renamed SPGears_mjg.rb to SPGears_mjg_v1.0.rb(may need to remove)
/// and I placed the SPGears_mjg_v1.2.rb

- Extensions Menu still shows: SPGears_mjg
/// but the new ShatfDiameter options shows in the SPGears Parameters dialog
/// thus it is running the SPGears_mjg_v1.2.rb
/// tried the Shaft Diameter... creates no centered hole for the shaft at all ?

Also, creating 2 beveled gears of different radius.. 48 and 24 teeth
Number of Teeth: 48 24
Pressure Angle: 20 "
Pitch Radius: 10" 5
Face Width: 3" "
Helix Angle: 0.0 "
Bevel Angle: 45deg "
Shift Diameter: 0.5, or 0.375, or 0.3125 "

The teeth line up at the large(outside) face end, but fail to line up at the small(inside) face end
- Is this due to incorrect/missing parameters?
- (can you point to some instructions?)
0

DingBEN 
 

Re: [Plugin] SPGears v1.2 - released 12/17/2016

Postby DingBEN » Thu Jun 08, 2017 6:35 am

REF:
/// previous msg, stated beveled gears fail to match on inside/small face

thus this line:
/// Beveled helicals are not very precise (yet), so getting them to line up with mating gears may not work

on page:
/// viewtopic.php?f=323&t=46319

...may explain this anomaly!?

...had read it initially, but did not remember... a 2nd visit, woke me up!
1

DingBEN 
 

Re: [Plugin] SPGears v1.2 - released 12/17/2016

Postby DingBEN » Thu Jun 08, 2017 9:29 am

HEY! I have added a few improvements to your list.
...and mind you, I even prioritized them


Already planned improvements for next version:
  1. - emboss gear with parameters used to create it(3D text): T-48, Rad-10", ...
  2. - emboss gear with MSPversion used(3D text): MSPv[1.2], ...
    OR surely those values could be in the entity!?
  3. - additional gear styles (rack, worm, and internal ring)
  4. - improve calculations and accuracy
  5. - web dialog UI (additional input params and auto-calculations)
  6. - gear properties/specs dialog via context menu
  7. - improved validation
1

DingBEN 
 

Re: [Plugin] SPGears v1.2 - released 12/17/2016

Postby jgrundman » Thu Jun 08, 2017 5:53 pm

DingBEN wrote:HEY! I have added a few improvements to your list.
...and mind you, I even prioritized them


Already planned improvements for next version:
  1. - emboss gear with parameters used to create it(3D text): T-48, Rad-10", ...
  2. - emboss gear with MSPversion used(3D text): MSPv[1.2], ...
    OR surely those values could be in the entity!?
  3. - additional gear styles (rack, worm, and internal ring)
  4. - improve calculations and accuracy
  5. - web dialog UI (additional input params and auto-calculations)
  6. - gear properties/specs dialog via context menu
  7. - improved validation


  • - Embossing is an interesting idea. Unfortunately, I'm still working through the "must have" list, so embossing will have to go on the "maybe" list.
  • - Rack, Worm, and Ring have already been added; just working out the kinks. I posted a "sneak peek" video earlier in this thread. Check it out.
  • - Calculations and accuracy are greatly improved and I've even added resolution options for speed (low & med res) vs. accuracy/smoothness (high & very high) to accommodate 3D printers.
  • - Web dialog is already planned and will include a few auto-calculations. I'm trying to keep the UI minimal, so it will only include a few details to help with dialing in the params.
  • - Spec dialog and entity properties are planned.
  • - Validation has been improved but increases in complexity with each user input. So, input params will be kept to a minimum.

Thanks for the suggestions, and for prioritizing them. Sorry embossing was bumped to the end of the list, but it is still on there.

Just in case your next question is "when", the answer is still "soon", but I've had to put it aside for a bit to focus on other stuff. :( I was shooting for Summer, but now my hope is to get it out by Fall.

-J-
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Re: [Plugin] SPGears v1.2 - released 12/17/2016

Postby jgrundman » Thu Jun 08, 2017 6:22 pm

DingBEN wrote:REF:
/// previous msg, stated beveled gears fail to match on inside/small face

thus this line:
/// Beveled helicals are not very precise (yet), so getting them to line up with mating gears may not work

on page:
/// viewtopic.php?f=323&t=46319

...may explain this anomaly!?

...had read it initially, but did not remember... a 2nd visit, woke me up!



Yeah, redoing the Spiral-bevels for the pending version was a big hurdle and still isn't perfect. Right now, I have to sneak up on the ideal helix angle to get a proper fit. By adjusting the target angle by 1-3 degs. I can usually clear up interference in the pair.

BTW, the pending version draws mated pairs, aligned and enmeshed. It makes the sneak-up process easier, but you still have to examine the tooth contact, close-up and from numerous angles. It needs more work, but I'm pretty sure I can solve it.
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jgrundman 
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Re: [Plugin] SPGears v1.2 - released 12/17/2016

Postby TIG » Thu Jun 08, 2017 6:29 pm

Why haven't you updated the RBZ version of your entry in the PluginStore ?

It's quite straightforward to edit it...
But if you need assistance PM me or Rich...

You should then add a link in the original post to its Download...

It would avoid any ongoing confusion.
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TIG
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Re: [Plugin] SPGears v1.0

Postby carts » Wed Jul 24, 2019 1:21 pm

mikaelgu wrote:Found a small bug:
Regardless of the unit of measure of pitch radius, the face width is always measured in inches, makes it a little harder to make gears of certain widths when using the metric system.


open the plugin in notepad press ctrl+f or from Edit menu select Find... type "inch" (without quotes)and press find next button. You will see...

@@rad_pitch = 5.0.inch
@@face_width = 3.0

make it to

@@rad_pitch = 5.0.mm
@@face_width = 3.0.mm

then press again Find next and you will see...

# number of teeth/inch

make it

# number of teeth/mm

and press ctrl+s or from File menu select Save. That's it.

Plugin path is C:\Users\Username\AppData\Roaming\SketchUp\SketchUp 2019\SketchUp\Plugins
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carts 
 

Re: [Plugin] SPGears v1.2 - released 12/17/2016

Postby pacaeiro » Mon Oct 14, 2019 7:07 pm

Good afternoon and thank you for this wonderful plug-in.
My question is:
Is there an easy way to make different number of tooth gears with same teeth size?
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pacaeiro 
 

Re: [Plugin] SPGears v1.2 - released 12/17/2016

Postby Dave R » Tue Oct 15, 2019 12:45 am

This extension will do that. The number of teeth will determine the diameter of the gear.

There are other gear-generating extensions that can do the same thing.
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Etaoin Shrdlu


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Re: [Plugin] SPGears v1.2 - released 12/17/2016

Postby pacaeiro » Tue Oct 15, 2019 7:26 pm

Thank's Dave, but it's not the result I'm getting.
I made a gear with 36 teeth, if I made another with 18 teeth the diameter is the same and the teeth have duplicated the size.
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pacaeiro 
 

Re: [Plugin] SPGears v1.2 - released 12/17/2016

Postby Dave R » Tue Oct 15, 2019 7:44 pm

Hmmm.... I haven't looked at this one for a long time. Looks like you need to know the pitch radius of the gear and let it put in the right number of teeth. I generally prefer to model gears in a more manual way to make sure I get tooth profiles correct. It's not really difficult and I'm assured of getting what I really want.
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Etaoin Shrdlu


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(THERE'S NO PLACE LIKE)

G28 X0.0 Y0.0 Z0.0

M30

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Re: [Plugin] SPGears v1.2 - released 12/17/2016

Postby pacaeiro » Wed Oct 16, 2019 1:13 pm

I would be cool if we have a Modulus and Number of teeth as both factors to construct the gear. That way all gears relate to each others.
Put it here as a suggestion.
Thank you!
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