|Hive13 CNC Projects|
|CNC Router Build, DIY CNC Router, Gigabot, Hive13 CNC Projects, Hive13 Stepper Motor Driver Board, Inkjet Eggbot, MakerBot, Mendel, Plasma CNC Cutter, Shapeoko CNC Router|
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|Start Date: 07/01/2009|
- 1 New Page Layout
- 2 MakerBot Status
- 3 Roadmap
- 4 Commissioning parts
- 5 Gallery
- 6 Story So Far
- 6.1 Buying the Kit
- 6.2 Building It
- 6.3 Testing / Calibration
- 6.4 Heated Build Platform
- 7 Misc Links
New Page Layout
This page needs a little bit of an overhaul. Work in Progress...
- Log of fixes, tweaks, skeinforge settings
As of 02/02/2010: Replaced PTFE insulator. Back in business!
- LCD Screen
Make More 3D Printers
- Print a spare extruder for MakerBot
- http://www.thingiverse.com/thing:958 (first, print the replacement retainer plate)
- Print Mendel parts
- 2nd MakerBot
New Design Projects
- Eggbot Parts
- DIY CNC Router Parts
- I'd like to try to build and open source version of some of these biped robot kits: http://www.lynxmotion.com/Category.aspx?CategoryID=85 DaveMenninger 14:48, 5 August 2009 (UTC)
Are you interested in having something printed? Contact User:DaveMenninger and we will work with you to get something made.
Things we designed
|s|frameless|none</flickr>||Hive13 coin: http://www.thingiverse.com/thing:989|
|s|frameless|none</flickr>||Randomized Parametric Snowflakes: http://www.thingiverse.com/thing:1388|
Other Things We've Printed
Story So Far
Buying the Kit
- Dave purchased it and the club will re-imburse him via this pledge drive: http://pledgie.com/campaigns/5391
Even more photos can be found at: http://www.flickr.com/photos/dave_menninger/sets/72157622034653288/
Here is how far I got on Day 1. DaveMenninger 06:02, 14 August 2009 (UTC)
Here is how far I got on Day 2. DaveMenninger 05:01, 19 August 2009 (UTC)
Here's how far I got on Day 3. DaveMenninger 05:06, 19 August 2009 (UTC)
Testing / Calibration
- z-stage stepper was wired backwards. (In all likelihood the other steppers are backwards too, but they are currently left as-is).
- fixed this by just plugging the z-stage stepper motor into the driver board backwards.
- z-stage was getting caught on the screws holding on the electronics on the side. was unable to descend.
- fixed by screwing the screws out a bit. we should find shorter screws, bigger stand-offs, or put the screws in the opposite direction.
- slight asymmetry of circular objects.
- y-stage belt was very loose, x-stage belt was slightly loose. tightened them up.
- build platform not perfectly level
- still working on this. it is a combination of leveling the top of the y-stage and keeping the z-stage perfectly parallel to the bottom of the bot
Extruder not extruding consistently
We had problems with extruder not extruding for quite a while. We could get it to print consistently by applying downward pressure on the ABS filament during printing, to prevent it from halting. Eventually we started to play with the settings in Skeinforge and were able to get much more consistent results if we increased the nozzle temperature and slowed down the filament feedrate. Since making these adjustments we have had barely any halting of the filament.
We recently did an extensive rebuild of our extruder head and we now have the opposite problem, it is extruding too much now. The rebuild included the following upgrade // maintenance sub-projects:
- First we dismantled the extruder head and nozzle completely. In doing this we discovered a couple issues. Molten plastic had been squeezed between the threads of the nozzle and the brass tube and completely encased the thermistor. This was causing our temperature readings to be too low, thus causing the nozzle to overheat which led to our second problem. The entire brass tube filled with molten plastic and then overflowed out the top of it causing a lip. This lip along with the large mass of now hard plastic made the extruder strip the plastic filament.
- Installed the extruder upgrade kit from Makerbot
- Installed a wider idler wheel from cleveland.
Since we bumped the gripping power of the extruder motor, we have two new problems, the extruder runs too well, while doing small infills, it will extrude a large quantity of plastic that it will run into in later layers. The second problem is that it starts to push the plastic before it is fully melted, this caused one of the retaining washers to break in half.
We're still working on this, but we found we could increase the solidity / watertightness of objects by tweaking several settings in Skeinforge. I don't have access to what settings we changed, but I will try to remember to look them up. Objects are not perfectly watertight yet, but we are closer.
Heated Build Platform
- Heated aluminum plate constructed
- initial heating tests successful (12V applied directly to 8 ohm nichrome wire)
- still need to:
- add thermistor to heated plate
- find patched makerbot software to support heated build platform
Photo of Heated Build Platform
Video of Raftless Printing with Heated Build Platform
- these may need to be turned into other pages for CNC, RepRap, etc