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Re: Z-axis force down nut. - 12 years ago

Try setting all your zeros with the table down, and all measurements will have reference to that point - just be sure that side of the frame is true vertical and ay 90 degrees to keep x and Y axis references true too.

by Scrachbuilder - General Mendel Topics

Re: asking for rail binding opinions - 12 years ago

3 point suspension can help. All measurements work from the Zero set for the X, Y and Z axis. It is on the side of the traveler nearest the zero for the respective axis, to have the two bearings; and on the farthest side to allow the single bearing room to float, preferably in the central position for the axis. For the z-axis, I have let the rails on that farthest side to float on the x-plane.

by Scrachbuilder - General Mendel Topics

Cure for Whole Frame Flexing Across X-Axis? - 12 years ago

Has anyone found a cure for the whole frame flexing across the X-axis. The frame, by the triangular design, is rigid on the y-axis; but on the x-axis the design allows the same triangular design to flex in that x-axis direction. Panels down the Y-axis slopes would help, but they would severely limit access to the table.

by Scrachbuilder - General Mendel Topics

Re: The death of Thingiverse? - 12 years ago

Among Model Railroad fans there is the landmark JMRI Case, only settled in 2010.that gave Open Source protection against others patenting or copyrighting collective efforts. I am surprised Thingiverse would not let things stay as this decision went.

by Scrachbuilder - General

Re: bar clamp fix - 12 years ago

Great idea: they are pretty tough when you need to break them!

by Scrachbuilder - Mechanics

Re: Printable mini lathe - 12 years ago

Sublime Wrote: ------------------------------------------------------- ... > > I did experience a few issues. > > 1) PLA chuck jaws can not handle the heat Shapeways print stainless steel - do you think s/s jaws would loose the heat as a heat sink with a fan on them ?

by Scrachbuilder - General

Re: Universal Paste Extruder for RepRap - 12 years ago

Has anyone experimented with acrylic paints?

by Scrachbuilder - Paste Extrusion Working Group

Re: MendelMax build... Costing - 12 years ago

It is going to take time, and my suggestion is to build in affordable stages. Most of the items are available at a good hardware shop, on eBay, or in well documented instructions on this site. I am still building a bespoke machine after 3 months!

by Scrachbuilder - General Mendel Topics

Re: Linear bearings - 12 years ago

You must use Metric Tool Steel Tight Tolerance Rod with these bearings. (McMaster Item 88625K67 - 3' lengths) In the US McMaster-Carr on www.mcmaster.com is a good source for the Metric rod: pick a distribution point nearest you. I used eBay for the bearings, with free shipping from China/Hong Kong.

by Scrachbuilder - General Mendel Topics

Re: 5/16 instead of 8mm - 12 years ago

I built the basic frame with 5/16 because Metric is expensive in the US - 5/16 is readily available at ACE Hardware. All three moving axis are 8mm rod & threads at 1.25mm pitch. Because I have built to also use as a 3D Mill; both the x & y axis rods are 12mm with other structural changes for strengthening. I found McMaster-Carr on www.mcmaster.com in the US a good place to source Metr

by Scrachbuilder - General Mendel Topics

Plotter head for printing acrylic paints. - 12 years ago

Has anyone had experience of designing a plotter head to print acrylic paints.

by Scrachbuilder - Developers

Re: How to convert 2d image to single layer stl file - 12 years ago

I would like to add to this:- Has anyone designed a head that will print/plot with a lacquer paint?

by Scrachbuilder - 3D Design tools

Re: secret to drilling 0.35mm nozzle hole - 12 years ago

Make yourself a bow, with a loop around the pin vice, and a palm piece for light pressure..

by Scrachbuilder - General

Re: Hotend theory - 12 years ago

re, Mendel90_hot_end.png I think if the heating core was tapped for M6, then it could be located nearer the nozzle, and only one M6 locking nut would be needed against the top; with maybe a serrated washer to lock against effects of highs/lows in temperatures. Also, a more balanced core around the nozzle would make for more even heat distribution with a second thermistor.

by Scrachbuilder - General

Re: Just wondering, can these machines be made any size? - 12 years ago

Excellent example of recycling newsprint and milk bottles.

by Scrachbuilder - General

Re: TangiBot the unapologetic Makerbot Replicator clone - 12 years ago

Sounds like a "Me too" situation. 1/3 off soon gets lost when he needs to expand. Where is the unique offering if it is the same?

by Scrachbuilder - General

Re: By Definition, a Miter Saw Stand is an Awesome RepRap - 12 years ago

Don't like the root design philosophy of the Miter Saw Bench at the top. There is moment on having only one single 2x6 between the Stand's legs.

by Scrachbuilder - General

Re: Just wondering, can these machines be made any size? - 12 years ago

If it is wood, the best method would be extrusion, with robot factory assembly for the major parts of the structure.

by Scrachbuilder - General

Re: Just wondering, can these machines be made any size? - 12 years ago

On Youtube there are examples of machines already printing complicated 3D concrete designs for construction projects.

by Scrachbuilder - General

Re: adding another heated bed - 12 years ago

There are larger and longer heated beds now available on eBay.

by Scrachbuilder - General

Re: Just wondering, can these machines be made any size? - 12 years ago

The initial design is 5/16- 8mm rods. To build bigger there will be problems of flexing which, as previously posted, will distort printing. I have used the injection molded vertices - available on eBay. I am building to take a small router for milling model engineering, and on both the x and y axis have increased the rods to 12mm. The top brackets have aluminum outriggers at 7cms for router h

by Scrachbuilder - General

Re: Anyone with experience getting raised script into 3D - 12 years ago

Is it a fixed font selection, or can you create your own?

by Scrachbuilder - 3D Design tools

Re: Mach 3 Electronics - 12 years ago

I see Mach3 G-code has 3 decimal points of accuracy in the co-ordinates. Is this translated o'k by the Reprap Drivers?

by Scrachbuilder - Mach3

Anyone with experience getting raised script into 3D - 12 years ago

Is there anyone with experience getting raised script into 3D?

by Scrachbuilder - 3D Design tools

Re: Casting Mendel parts - 12 years ago

I started with injection moulded ABS parts for the 6 vertex pieces. In the design, they appear to be the key parts for rigidity of the basic supporting framework.

by Scrachbuilder - Casting and Moldmaking Working Group

Re: ordering mold from Shapeways - 12 years ago

For strength, I would like to see solid webs joining each pair of the opposing rods.

by Scrachbuilder - Casting and Moldmaking Working Group

Re: I am getting a sense that big business is moving in. - 12 years ago

I agree with "edjuh" ::- The basic design is open to all to copy, and it is very much an exercise in collecting the various pieces, to make a machine that is uniquely your own. The contributions of those shareing their experiences is important to the process of building the ultimate machine.

by Scrachbuilder - General

Re: What are the real advantages of Mach3? - 12 years ago

When so much is Open Source, a Mach3 license for $150 does not sound too bad.

by Scrachbuilder - Mach3

Re: which electronics? - 12 years ago

nophead Wrote: ------------------------------------------------------- > I don't know anything about the PrintrBoard but > having preloaded firmware is not really a selling > point. It has to be configured for the actual > machine, so you need to learn how to compile and > load the firmware yourself. I think this is a bit of a misnoma. The board comes with firmware preloaded and

by Scrachbuilder - Controllers

Re: Pronterface setting its own temperature - 12 years ago

Andrew: Thanks: It is the mintemp error message. The notes within the config file say - // The minimal temperature defines the temperature below which the heater will not be enabled // It is used to check that the wiring to the thermistor is not broken. // Otherwise this would lead to the heater being powered on all the time. That being so, while the max_temp is set to 250 to shut down, I th

by Scrachbuilder - Reprappers