Sunday, March 23, 2008
Yet Another Minimug
Having spent a while tweaking the parameters of my Darwin on a 10mm test cube, I decided to go for a minimug:
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEguvenNuzjxkiJirWuR9wjlQUSEITwY1IL4RDZpXqPfYLnVBYr4-jSmpeGw2qHxaptWgONgWl3869kWh81NeFOJ0iS8BEAHHOBofVHHF1EVWB1Gj79azqrb64Xjvg7wr6Q2lQ3WZQ/s320/minimug.jpg)
Which worked. My daughter Sally was home for Easter and so joined in the celebrations, which consequently had to involve Amaretto - slightly sweet, if you ask me:
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiJwppfwXQyKfN7aAGgPVVT6QevkuyboMK_E3mbC1P2j-WXfzp1YoriIDEkF7oSCVAOfnuxunxJBJkV2kclTPLHjPUQtbA_Yvg9-GC_4mKmAPC9M-JRY6_oZSJ3ecidgwc-QCSDGw/s320/a-and-s.jpg)
In for a penny, in for a pound: I then decided to throw a Darwin opto-switch bracket at it:
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEg1xFerEV3XZbJB5KAJqG3K_v9WaNM6tH4V7xf9uZov5wnPb3sQhDVmg-MrJqJIkdqYPCdeGPBppAEKRAxNEJ0v3V061j2ygmXDw3_ekAafAdU2fR2qeN39BVOu4yKwVjl078laLA/s320/opto-switch.jpg)
While it was printing, I soldered up a quick opto-switch PCB. Then I took the bracket off the build bed and ran a drill bit by hand down a couple of the holes to clean them up. I bolted the assembly together.
Finally I attached it to the very same extruder that made it:
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhr6bR3V9TxIm9gjlsNT0QeD_yprBTh_Gl-R3IAuayEcx3x7gNsq2oNRXl-TIy9X8sOe-moP84MkR4Wxysr4eU-RT5WTcAcu89JeWw5zQj2SM04HM52A7YQadkFeLYuEXZMZr_bkw/s320/extruder-opto.jpg)
That extruder now has speed feedback. Job done.
That's what I'm talking about...
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEguvenNuzjxkiJirWuR9wjlQUSEITwY1IL4RDZpXqPfYLnVBYr4-jSmpeGw2qHxaptWgONgWl3869kWh81NeFOJ0iS8BEAHHOBofVHHF1EVWB1Gj79azqrb64Xjvg7wr6Q2lQ3WZQ/s320/minimug.jpg)
Which worked. My daughter Sally was home for Easter and so joined in the celebrations, which consequently had to involve Amaretto - slightly sweet, if you ask me:
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiJwppfwXQyKfN7aAGgPVVT6QevkuyboMK_E3mbC1P2j-WXfzp1YoriIDEkF7oSCVAOfnuxunxJBJkV2kclTPLHjPUQtbA_Yvg9-GC_4mKmAPC9M-JRY6_oZSJ3ecidgwc-QCSDGw/s320/a-and-s.jpg)
In for a penny, in for a pound: I then decided to throw a Darwin opto-switch bracket at it:
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEg1xFerEV3XZbJB5KAJqG3K_v9WaNM6tH4V7xf9uZov5wnPb3sQhDVmg-MrJqJIkdqYPCdeGPBppAEKRAxNEJ0v3V061j2ygmXDw3_ekAafAdU2fR2qeN39BVOu4yKwVjl078laLA/s320/opto-switch.jpg)
While it was printing, I soldered up a quick opto-switch PCB. Then I took the bracket off the build bed and ran a drill bit by hand down a couple of the holes to clean them up. I bolted the assembly together.
Finally I attached it to the very same extruder that made it:
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhr6bR3V9TxIm9gjlsNT0QeD_yprBTh_Gl-R3IAuayEcx3x7gNsq2oNRXl-TIy9X8sOe-moP84MkR4Wxysr4eU-RT5WTcAcu89JeWw5zQj2SM04HM52A7YQadkFeLYuEXZMZr_bkw/s320/extruder-opto.jpg)
That extruder now has speed feedback. Job done.
That's what I'm talking about...
Labels: first print, minimug