Belfry Fabber Mk1 rev7
by Revar, published
Description
When I originally wanted to make a CupcakeCNC, I ran into the problem that a lot of parts from Makerbot were out of stock. Since I was impatient, I ordered what parts I could (The electronics and the extruder parts) and designed up my own frame to put them in. Then I spent a year improving on it.
The major features are:
* A larger build area (about 165x175x170mm)
* A heated build platform to allow warp-free large builds
* Support for computer-less control via an LCD and keypad
* The ACME threaded rod and guide rails makes the Z axis wobble less
* Endstops on one side of each axis makes for quick and easy automatic homing/centering
* The frame and sled are built mostly from parts you can find easily on mcmaster.com
Yes, I know, I'm a heathen American for using non-metric parts, but it turns out it's a lot harder to find all the right metric parts in American hardware stores. Feh. Luckily most all the non-metric parts can be replaced by metric parts of close size without too much problem. Except the 12" slider rods. 300mm sliders rods will be 4.8mm too short.
Here's a video introduction to the Fabber Mk1:
youtube.com/watch?v=XKoIKgk9Grc
Recent Comments
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I really like my tape job. It gives the bot color. I'll try to print those again but the LCD box was too short (length wise) leaving a larger gap than I really cared for to glue together. I stared to print the keypad one but my keypad is not the right one and is too large. I need to scale them but haven't had the time.-Too busy building and tuning my T-O-M.
you can print these for the keypad and LCD
The sources are available at https://github.com/revarbat/G3... in the RevarLCD branch. You can change your STEPS_PER_MM_XY and ENDSTOP_* settings in the v2/src/Motherboard/modtronics_lcd/LCDConfigs.hh file. If you need I can spin up a firmware for your specific settings. I just need to know how far from the center your platform is when it trips the endstops, and whether it's the min endstops or max endstops.
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Instructions
github.com/revarbat/Belfry-Fabber/wiki/Build-Instructions
The SVG file has designs for cutting on a laser cutter with a kerf of about 0.008". It's designed to be cut from 1/8" tempered hardboard or MDF.
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The firmware has been working great for me on my cupcake with the LCD and keypad. Not one single issue!!!! The only thing I can tell that is bot specific is the homing. I'm of course using Pololu stepper drivers set a 1/8 step but home does not go anywere near the center of the bot-just curious if I need to get the source firmware and mod something in it?
The sources are available at https://github.com/revarbat/G3... in the RevarLCD branch. You can change your STEPS_PER_MM_XY and ENDSTOP_* settings in the v2/src/Motherboard/modtronics_lcd/LCDConfigs.hh file. If you need I can spin up a firmware for your specific settings. I just need to know how far from the center your platform is when it trips the endstops, and whether it's the min endstops or max endstops.
I would love to add your keypad - lcd - sd card ability to my Mendel with Gen3 electronics.
I think this is especially cool for giving demonstrations - your SD card contains 10 popular items such as coin op bottle opener, whistle, heart box, screwable jewelry box and then you pick an object and print it as shown in your very nice video.
Looking forward to seeing the documentation for adding the keypad
&
amp; lcd.
Nice job!
:)
Here's the docs for the LCD+Keypad. It uses v1.8 based firmware, but I'm trying to finish debugging v2.7 based firmware in the next few days.
What firmware for the gen 3 electronics are you using? I found that I had lots of problems with the current LCD firmware based on 1.8 and gave up for a little while. I like the auto homing feature also.
I'm currently debugging a v2.5 based version of my firmware. Works great, until the first time you press the stop button.
&
amp;gt;:o. I'll have a new release at my github repository soon.
Why did you decide on using 1/8 step instead of 1/16th?
I don't have a GOOD reason. I just felt gitchy feeling that it would slow down my upper speed rate. At 1/8 stepping I'm already having it throw step pulses about every 3 stepper interrupts when the code likes a step pulse about every 8 or so.
Pretty sick man, good work! Can you post some documentation or more build photos?
Keep it up!
Definitely. This is a work in progress. I'll post build instructions when I can get some time to take all the photos. I have family obligations this weekend, but soon after that I can finish this up.
Wow is that an SD card slot I spot?
Yes, that's an SD card slot above and to the right of the LCD. In general, I almost always build from the SD card, using the LCD and keypad to set up and start the build, without a computer attached at all. I use the LCD+Keypad mod described in http://www.thingiverse.com/thi... , but just built into the frame of the fabber.
So my copy is just the LCD-and it's taped until I come up with something better. His bot is way cooler.
you can print these for the keypad and LCD
http://www.thingiverse.com/thi...