Cyrozap's Tech Projects

Computers. Circuits. Code.

Almost there...

All I have left is to wire up the power supply and attach the heated bed!

Any Recommendations for Prusa Mendel Parts?

Progress on the RepRap has slowed to a crawl and it's really bumming me out. Building from kits is SO much easier than sourcing the parts yourself. I've probably gotten the final cost estimate into the $600-$700 range by now.

Anyway, I need your help. I just need to print out the new X-carriage, get some M3x25mm bolts, buy some MDF for the Y-stage, and get a hot end. However, I don't really know what to get. What are the recommended dimensions for the Y-stage (LM8UU bearings)? What's the best hot-end for 3mm PLA that I can get in the U.S. for a Wades extruder?

Feel free to comment with your suggestions!

Prusa Mendel X-Carriage

This is the day you will always remember as the day I FINALLY PRINTED THE PRUSA X-CARRIAGE!

If you can't tell, I'm really excited. It turns out that the missing ingredient to my MakerBotting success was some isopropyl alcohol (70%, a.k.a. rubbing alcohol) to clean oils off of the build platform. Once I cleaned the platform, prints started sticking like they did when I first upgraded to the HBP. It's AWESOME.

Now that I've gotten the x-carriage printed, the rest of the parts should be easy by comparison. Once I get them printed, I'll start buying the hardware for the new machine.

Making a Prusa Mendel

I've decided to print as many parts as I can to make a Prusa Mendel. Hopefully I can make enough parts so I can just ask some people to make the parts my CupCake can't make. Currently, every object I make has too much perimeter material—parts designed to interlock don't fit. I've tried to fix this in Skeinforge, but right now I'm adjusting my belt tension to see if that helps. My CupCake fails on large prints, so I'll need help on those.

The goal of getting my MakerBot was to get it to make a full set of working RepRap parts, but it never has. This has made me a bit sad. So, to remedy this, I'm going to calibrate my bot to the best of my ability (and maybe get some help from others in the 3D Printer Village) and print as many parts as I can. Wish me luck!

Early Christmas Gifts Are Awesome

The MK5 parts kit!

My dad got me a MK5 kit for Christmas after my MK4 broke for the 3rd time in a few months (PTFE insulators are annoying—I think my thermistor table was wrong). I have since put it together and am currently printing out the Holiday Prusa Mendel on Thingiverse with it. Talk about the gift that keeps on giving! :)

However, there were some problems I noticed:
- Thermistor read wrong temps—ABS now likes to melt at 200C
- Solder joints on power resistors melt partially when running at 200C
- The online instructions for putting it together didn't account for certain changes in the kit; for instance, it comes with two crimp connectors that are never explained.

I did make some improvements, however:
- Added thermal paste between power resistors and aluminum block
- Epoxy used to glue together base-plates to the legs of the extruder holder

My current grievances:
- I don't like that the solder joints are melting and cooling—I don't want to have the risk of breathing in those bad fumes.
- Teflon on nozzle is coming off tip

Final thoughts:
- If it doesn't work flawlessly, at least it works a lot more reliably than the MK4!

Interesting things I noticed today while writing this:
- The server is running quite quickly...
- The 5.1MP Sony Cyber-shot DSC-P93 I used to take the picture in this post (I got it for free from a friend of my dad) has hardly any image sensor noise. This is amazing compared to the amount of sensor noise in my 5.0MP Canon PowerShot S2 IS (consumer-grade DSLR).

Selling Half-Set Reprap Mendel Parts on Sell Simply

Set of RepRap parts

This set of parts is a little over half of all the parts needed to build a RepRap Mendel. If I don't get any offers for the complete half-set, I will start offering parts individually. If you want individual parts, please contact me at cyrozap AT gmail DOT com.

Make offers on it at

SellSimply shop is up!

Go to to see the Mendel Mini parts that I posted! It's a half-set, so if you're having trouble printing some of the parts for the Mendel Mini, or want to get a head start on printing your own set, this is the set for you! If I don't get any offers for the complete half-set, I'll start offering parts individually. Email me if you're interested in individual parts.

Mendel Mini Parts to be Made and Sold!

Currently, my MakerBot is producing the parts needed to build a Mendel Mini. I will not be making them for myself—these will be sold on ebay. I'll be posting a link here and on the RepRap forums when they're available. These parts will cost about half as much as a set of Mendel full-size parts at around $250.