Wednesday, September 12, 2012

Further Model Progress

Did a little more modeling today, with my primary goal to adjust the trigger and put together an assembly. While still a rough design, I managed to get the trigger a little closer to it's final dimensions. I only have to create a space for the return spring, which I have to further the shell design in order to do.

I put together the assembly to see how the parts would interact, and so far, so good. After comparing the dimensions, I saw the trigger was hitting the catch further than it needed, so I shortened the distance. I was also able to remove the slope on the tail, which was only needed to slide the catch up on the stock model. Since I'll instead be pushing directly onto the catch, I can make a straight piece. That will make modeling and dimensioning much easier.

I also decided to clean the shell a little, making the curves into splines, and placing a trigger space (although clearly in the wrong spot). Still just trying to make sure the trigger will fit where I want it to, and I need to make a physical mock up of the spacing to get dimensions from.

Click for larger image

Tuesday, September 11, 2012

A trigger!

After modeling the rough shell outline and adjusting the size somewhat, I started modeling the trigger. I began by taking the dimensions from the existing trigger.

After looking at how the stock trigger works (simple one axis motion) I realized it would take up too much space behind the trigger, limiting my grip. Since I really want the grip to start behind the trigger, I had to make some adjustments. I decided to make the trigger rotate instead of translate. This will make the motion curve upwards into the shell, instead of back towards the handle.

This required some simple redesign. I will have to relocate the trigger spring and put the finger space (term?) under and behind the pivot point. I may also have to move the pivot point location present on the stock shell.

Click for larger image

Next step is to put together an assembly of the shell and the trigger and see where it all sits.