Gear Workbench

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HtRabbit
Posts: 12
Joined: Sat Apr 10, 2021 2:33 am
Location: BC Canada

Gear Workbench

Post by HtRabbit »

I am using the Gear workbench
trying to get the worm wheel to have an arch or curvature to match the wormgear. i cannot find any settings for this.
i am also try to figure a good way to find the center of the gear.

Code: Select all

OS: Windows 10 Version 1909
Word size of FreeCAD: 64-bit
Version: 0.20.2.29603 (Git)
Build type: Release
Branch: releases/FreeCAD-0-20
Hash: 930dd9a76203a3260b1e6256c70c1c3cad8c5cb8
Python 3.8.10, Qt 5.15.2, Coin 4.0.1, Vtk 8.2.0, OCC 7.6.3
Locale: English/United States (en_US)
Installed mods: 
  * 3DfindIT 1.2.0
  * 3D_Printing_Tools
  * A2plus 0.4.59
  * Assembly4 0.12.4
  * CADExchanger
  * CurvedShapes 1.0.4
  * Curves 0.5.8
  * Defeaturing 1.2.0
  * fasteners 0.4.6
  * fcgear
  * Help 1.0.3
  * Manipulator 1.4.9
  * parts_library
  * pcb
Attachments
SwingGear.FCStd
(921.06 KiB) Downloaded 7 times
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Workshop_Notes
Posts: 590
Joined: Wed Sep 29, 2021 8:35 am

Re: Gear Workbench

Post by Workshop_Notes »

HtRabbit wrote: Sun Mar 26, 2023 8:07 pm trying to get the worm wheel to have an arch or curvature to match the wormgear.

I am also try to figure a good way to find the center of the gear.
There are commonly four arrangements of worm and wheel:

https://roymech.org/Useful_Tables/Drive/Worm_Gears.html

The FC gear module does not have the ability to produce all four.

In your file, the 'placement' of the wheel is its centre (0,0,0). Right click in the tree and choose 'transform' (works similarly for the worm).
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papyblaise
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Posts: 7867
Joined: Thu Jun 13, 2019 4:28 pm
Location: France

Re: Gear Workbench

Post by papyblaise »

you have to make an arc sector equal to one tooth (green on my photo), subtract the screw and make an Array to make the total, I only made 1/4 of it to have a 1GB file
Attachments
SwingGearPPB.FCStd
(899.26 KiB) Downloaded 7 times
SwingGearPPB.JPG
SwingGearPPB.JPG (26.21 KiB) Viewed 335 times
User avatar
HtRabbit
Posts: 12
Joined: Sat Apr 10, 2021 2:33 am
Location: BC Canada

Re: Gear Workbench

Post by HtRabbit »

so for a 100 tooth gear i need 3.6 deg per tooth....correct?
SwingGear1.FCStd
(368.26 KiB) Downloaded 9 times
here is what i did. it looks great however i need to edit the gear and combine every thing into a single part so i can add the axle holes etc.
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