What Have You Been Hacking/Making [2018-01-01 edition]

[remmin...@2xlnetworks.net]

This is a message from reMMinderbot.

Makers! It's time to share... what have you been hacking on or making?

Reply to this email with a brief run-down of whatever projects have
been keeping you busy, either at the space or elsewhere. And, include
a photo if you can!


reMMinderbot thanks you!

[the_digital_dentist]

I have just about finished the enclosure heater design for UMMD and run a couple tests.  I need to cut a few parts (tomorrow) and bolt it all into the printer.

Also did some experimenting with wifi controlled light bulbs.  Here's one of the tests.  The particular lamp I used in this test won't be the final one.  I decided I don't like the wifi type and will be trying out a bluetooth controlled bulb tomorrow night if it arrives.  I'm not real happy with the light being centered in the shade and would prefer it to light from the very bottom, so when I have a suitable lamp, I'll take it apart and put the LEDs in the base and put the electronics elsewhere, maybe in a printed base for the lamp.  I tried some LED strings but found they weren't bright enough for effective illumination.  The bluetooth bulb coming tomorrow is theoretically equivalent to an 80W incandescent lamp, so should throw a usable amount of light.

I'm reexamining my extruder carriage design in UMMD.  I think I can make it better, so...  One thing I didn't do in the original design is center the extruder nozzle- it is offset from the motor shaft 11.1 mm.  That forced me to offset the bed by that amount, and it's right at the limit of where it can go and that bothers me.  I'm going to try to center the nozzle in the carriage and that will let me move the bed back toward the center.  I'm also looking at ways to improve or eliminate the printed belt clamps on the extruder carriage.  Right now the belt tension is trying to shear the print layers apart and I don't trust it to last, especially not once I start heating the enclosure.

[Pete Prodoehl]

I tried to 3D print something:

    http://rasterweb.net/raster/2018/01/01/3d-printing-or-trying/


I also started designing a new PCB:

    https://www.instagram.com/p/BdYyFp-lGVd/


Pete

[the_digital_dentist]

What is the surface on the bed in that printer?  Maybe something stickier would be better.  I assume you've tried the usual- hotter bed, hotter extruder, slower first layer print speed...

Printing ABS when it's cold is a real problem.  My basement is at about 15C now and I'm have problems with it.  SoM is in the frigid cooties closet at the space and even when it's buttoned up tight it's still a little too cool to print ABS.

[Pete Prodoehl]

Printing on PEI but it's not secured to the glass underneath very well.
I'll continue to test things, including plain glass with ABS slurry or
PVA glue. It's been a mix of fun and frustration lately. (My basement
was 10C yesterday.)


Pete

> --

[John Eich]

Hey Pete,

I forwarded your blog post to our 3D printing guru, and he had these suggestions: 

Possible issues:
Enclosure too big - The heat generated by the printer will never get it up to the >~40C ambient to print a large ABS part
Bed was at 90C - should be 100C or more for a large part
Running the print in a cold basement
Glass and hairspray/glue-stick suck for ABS bed adhesion - get some BuildTak for PEI
Try some better quality ABS
....Or just get some PETG.... best stuff for 'utility' parts needing strength.

Good luck!  

John

The Bodgery makerspace

[the_digital_dentist]

Glass is an insulator- you have to raise the temperature to ensure that the surface of the glass gets hot enough.  If you set it to 90 you'll be lucky if the surface gets to 80.

On Tuesday, January 2, 2018 at 11:38:08 AM UTC-6, Pete Prodoehl wrote:

[Pete Prodoehl]

On 1/2/18 11:56 AM, John Eich wrote:

Hey Pete,

I forwarded your blog post to our 3D printing guru, and he had these suggestions: 

Possible issues:
Enclosure too big - The heat generated by the printer will never get it up to the >~40C ambient to print a large ABS part

Enclosure is just barely larger than the printer. ;)

Bed was at 90C - should be 100C or more for a large part

I can try a hotter bed... I may have set it to 90 not 100.

Running the print in a cold basement

Yes!I do that...

Glass and hairspray/glue-stick suck for ABS bed adhesion - get some BuildTak for PEI

I will try something besides PEI... ABS slurry or PVA glue on glass.

Try some better quality ABS
....Or just get some PETG.... best stuff for 'utility' parts needing strength.

This is Coex ABS, though it's been around a while. Print looks great when it works, so I think the filament is fine.


Pete

Good luck!  

John

The Bodgery makerspace

On Tuesday, January 2, 2018 at 11:38:08 AM UTC-6, Pete Prodoehl wrote:

Printing on PEI but it's not secured to the glass underneath very well.
I'll continue to test things, including plain glass with ABS slurry or
PVA glue. It's been a mix of fun and frustration lately. (My basement
was 10C yesterday.)


Pete


On 1/2/18 9:37 AM, the_digital_dentist wrote:
> What is the surface on the bed in that printer? Maybe something
> stickier would be better.  I assume you've tried the usual- hotter
> bed, hotter extruder, slower first layer print speed...
>
> Printing ABS when it's cold is a real problem.  My basement is at
> about 15C now and I'm have problems with it. SoM is in the frigid
> cooties closet at the space and even when it's buttoned up tight it's
> still a little too cool to print ABS.
> --

--

---
You received this message because you are subscribed to the Google Groups "milwaukeemakerspace" group.
To unsubscribe from this group and stop receiving emails from it, send an email to milwaukeemakers...@googlegroups.com.
For more options, visit https://groups.google.com/d/optout.

[Ben S.]

Hi All,

I've been working on a few projects...  A black walnut dining table, some modernist lamps and sconces, and a series of radical sports jerseys for an art show at Western Exhibitions in Chicago this weekend.  Here they are...

Black Walnut Dining Table
Measures 56-72" (with or w/o leaf) x 36" wide x 29" tall.  Made of solid black walnut.  Still awaiting a final coat of finish. 

Thanks to Wolfgang, Shane, Steve, Bill, Rick and everyone who shared their expertise and

put up with my extra parking passes while I was doing glue-ups last month!

Modernist Lamps and Sconces

Huge thanks to Wolfgang, Shane, Paul F., and everyone who helped me finish these in time for HoverCraft last month!

Radical Sports Jerseys

This is a collaborative project with fine artist and UWM professor Nicolas Lampert.  Karen sewed the garments and did an amazing job on short notice.

I cut and sewed the patchwork.  Shoulder patches were done with a 6 needle embroidery machine.  The jerseys will be part of an art show in Chicago this weekend at Western Exhibitions called Hand-Eye Coordination: Sports and Art. 

[Chris Hemmerly]

Ben, I love your dining table! It's gorgeous!