I have had some more practice with casting aluminum and now I have even upgraded my oven. My original ovens electrical plan did not account for wire durability based on wattage and length of wire so it quickly wore out.
I also attached an arduino nano to the oven so I could quickly enter rising and falling temperature times.
Further, because I now havea 3d printer I have been doing lost pla casting. Its much faster and the shrinkage can be predicted pretty accurately.
Below is a cut and paste of the results. Most of the time you need 105% enlargement for parts that can fit in your hand.
Name | Description | 3d length | 3d width | 3d inside | wax length | wax width | wax inside | alum length | Alum width | alum inside | target length | target width | target inside | shrinkage | Oversize Post Calc | notes |
7mm roller pin | pin for hypocycloid | 7.5 | 7.41 | |||||||||||||
hypo cam spacer | spacer for 100:1 cams | 18.8 | 38.7-38.8 | 14.92 | 18.2 | 38.2 | 14.75 | |||||||||
7mm roller 103% | scaled up | na/ stem | 7.03-7.15 | 5.02-5.12 | 6.81 | 4.79 | ||||||||||
cam spacer 103% | scaled up | 19.45 | 40 | 15.3-15.4 | ||||||||||||
square block 103% | scaled up | 11.87 | 65.37 | 26.74-26.84 | 11.4 | 64.61 | 26.88-27.12 | |||||||||
Eccentric 103% | scaled up | 82.29-82.38 | 4.89-5.13 | 10.10-10.20 | 4.83 | 9.8 | Stipling came in perfect but required light sanding which quickly pulled .2 of item | |||||||||
tree | 6.91 | 6.71 | ||||||||||||||
Here is an example of how easy it can be to cast. Casting is not really ever easy. Its time consuming.
![](http://cagneymoreau.com/wp-content/uploads/2019/07/2019-04-09-08.54.56-1024x768.jpg)
Below is my whole aluminum casting setup. You can see the oven is upgraded with a control unit and relay. I use a vacuum as normal to draw down pressure during pour. The toaster oven preheats the parts so they don’t have moisture.
Below are two of the parts. I whacked it with a hammer to see if it would do anything. It didn’t.