Tuesday, June 4, 2013

Modifying JHack's servobed and cover for easy mounting and removal: part 2

I was able to finish a rough draft of the new screwed down cover last night and printed it this morning.  Here is the print with support material.




Oddly, when I peeled support material off of it, one corner of the front screw-down tab was warped.  I'm not all sure why that happened.



I decided to make the guides an integral part of the cover so that there would not be a lot of gluing and messing about with the assembly.

Sunday, June 2, 2013

Modifying JHack's servobed and cover for easy mounting and removal: part 1

I did CAD work for the mounting block additions to the lower and upper halves of the loser side of the left hand forearm over the weekend.

I began by printing and gluing together the upper and lower halves of the left forearm.





I did a similar thing with Art of Illusion and Netfabb in CAD.  With both a real and virtual forearm bet I added JHack's servo bed.



With that model I was able to locate mounting blocks which snugly held the servo bed in place.



As I began to print test parts around 1100 on Sunday, however, my UPS system died, so I spent five hours getting a new one, which is also faulted but works for now.

I did a partial print of the lower half to see if the blocks holding the lower sides of the servo bed fit properly. Here you can see the blocks in place on the left.



On the right you can see the dummy block for the top of the servo bed in place in the glued lower half of the forearm.

Here I fitted the servo bed into the partial print.  The bed slides into place easily and the blocks are flush with the top of the bed.