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Re: Polycarbonate 3d printing - 6 years ago

Perhaps print molds and vacuform the parts?

by cozmicray - Polymer Working Group

Re: My 3d printer (work in progress) - 6 years ago

Are the design requirements: Not to be based on any proven design Use only hardware that is handy Print should not be visible when printing (hole cut in plywood - would not make it much more flimsy) Bed leveling next to impossible Do not use bolts or screws of the proper length? Do not cut bolts / screws to proper length? Do not use lock washers or stop nuts Drywall screw thru plywood not

by cozmicray - CoreXY Machines

Re: Generating a mould from stl file of the 3D drawing - 6 years ago

A web search for "mold design software" may be helpful Mold making in Sketchup Choosing CAD Software For 3D Mold Design ZW3D, ALL-IN-ONE, AFFORDABLE CAD/CAM

by cozmicray - 3D Design tools

Re: Core XY 400x400 - 6 years ago

I don't understand two steppers on the bottom? Two motors to drive 3 Z leadscrews? Z motion three leadscrews and three guide rods --- over constraint? Plastic parts shouldn't make up for over constraint. Why linear rail and rod mix?

by cozmicray - CoreXY Machines

Re: My coreXY design is progressing to the build stage - 6 years ago

It's about time to put real topics on these posts "My coreXY design is progressing to the build stage" probably has run long enough? Last few posts "cooling pump" not specific "core XY" FWIW Could be "the Digital Dentist sez"

by cozmicray - CoreXY Machines

Re: home made scara printer - 6 years ago

Take a look at the Helios

by cozmicray - Reprappers

Re: New printer design with new 'twist' for XY on Z - 6 years ago

The planer only cuts the tiny amount that the blades stick out. on some planners this is adjustable --- many fixed at 1/8 " or tuned to the power of the motor and drive system Leadscrews allow you to plop head down on wood and take the 1/8" cut that blade sticks out and keep the feeder rollers (if it has them) in contact with wood NOT a good example for 3D printing

by cozmicray - CoreXY Machines

Re: Need help in electronics for my CNC milling machine - 6 years ago

Students suppose to do research search the web for "CNC with Marlin software" What budget? $10,000? $100,000 RAMPS is just hat atop arduino running firmware turning g-code to motor movements Do you need cnc to do your project or Is the project to build CNC for 1m x 1m polymers? RAMPS wiki may be useful RAMPS mainly 3D printer controller What research / requirements drive use of RAM

by cozmicray - CNC Routers, Mills, and Hybrid RepRapping

Re: 3D Laser Engraving Machine - 6 years ago

What do you want to engrave? Glass --- tough -- need high power and the right frequencies see J Tech Photonics, Inc. designs and develops high power diode lasers solutions for research, industrial, and enthusiast applications. Shapeoko laser forum

by cozmicray - General

Re: KUB5 homemade printer - 6 years ago

Are the X axis guide rods rotating? Interesting to use rod as guide and drive?

by cozmicray - Reprappers

Re: Extending Smart RAMPS Tips and Advice - 6 years ago

Ramps or smart Ramps has only 5 motor drivers Two less than you require A Duet with DueX4 expansion board would get you 8 motor drivers Do you want to build a printer or spend all your time modifying controller electronics? Take all your requirements and bounce them against what electronics and firmware that is available or spend $100,000 developing a one of a kind mohala board

by cozmicray - Controllers

Re: HyperCube OverKill Build Log - Cross Rails & Center Carriage - 6 years ago

Linear rails appear to be Igus DryLin N series That is just a polymer trolley in a c shape aluminum. No strength at all in these tracks and are meant to be tied down to structure. A far cry from Hiwin rails with steel tracks and bearing trolleys Would be neat to know how the hold up? Flexing and trolley wear? Digital dentist What is your take on these linear rails? I khow you are proponent of

by cozmicray - Extruded Aluminum Frames

Re: precision positioning needed for shifting the position of lenses - 6 years ago

You should look at multi start or High helix leadscrew to get speed out of a lead screw multi-start lead screw product provides high linear nut speeds from low rotational screw speeds

by cozmicray - Mechanics

Re: Help with design for 2nd printer - 6 years ago

So that 10 hour print will grind away in your cupboard with the noise driving all crazy?

by cozmicray - General

Re: Laser selection questions, electronics? - 6 years ago

Big difference in diode laser to CO2 laser Diode laser can be moved around on print head CO2 laser tube fixed and optical system points the cut point. Many passes to cut things with 2 -3W laser

by cozmicray - Laser Cutter Working Group

Re: Towards printer-independent GCode - 6 years ago

The slicer needs to know the printer to gen the code A 3D printed circle is a bunch of segments designated in the CAD program Printer independent language Some CAD / CNC can define arc -- center point, radius, degree of arc Thus printing at resolution of printer GRBL commands Arc IJK Distance Modes: G91.1 QuoteWesBrooks Quotecozmicray the 3D printing world needs a type of language to move

by cozmicray - General

Re: Laser selection questions, electronics? - 6 years ago

Video of 1.75 W 455nm laser on Shapeoko 2 (arduino - GRBL) I think it was 12 passes to get thru corrugated cardboard Cutting takes lots of power and focused laser

by cozmicray - Laser Cutter Working Group

Re: Towards printer-independent GCode - 6 years ago

The progression in ink printing was dot-matrix Ink-jet Laser and greater and greater resolution Printing at the resolution of the printer not the display device Postscript was developed to provide the language for this. (first device-independent Page Description Language (PDL),) the 3D printing world needs a type of language to move forward

by cozmicray - General

Re: Hotend design question - 6 years ago

Economics What is cheaply available Now What is vaporware?

by cozmicray - General

Re: Software and electronics for lasers - 6 years ago

I was given a simple 1.5w laser engraver for Christmas. I won't tell you what brand it is or include any pictures so it is easy for you to reply.It's great fun but it has some obvious drawbacks. I'd be quite interested to strap the laser into a proper machine.Like a cooper mini! or Haas CNC machine I could take the electronics from my current engraver, but without much knowledge of what it is, th

by cozmicray - Laser Cutter Working Group

Re: Hotend design question - 6 years ago

An induction heating electronics is not that simple, and expensive. Extruder and hot end are a high pressure pump. Taking polymer from solid, to plastic, to liquid and then pressed out a small nozzle The heating zone has to be a specific size to provide a melt zone and pressed out with solid filament as a piston. What is the deal with making it more efficient ?Battery powered printer? Takes a

by cozmicray - General

Re: Just starting - 6 years ago

PWM laser action Engraving of calibration scale by PWM 1.75W laser PWM input to laser TTL trigger, wider (longer) the pulse width the more power, more burning This is a raster scan of calibration scale

by cozmicray - Laser Cutter Working Group

Re: Just starting - 6 years ago

Switching a Laser diode power ON/OFF is rough on diode Using PWM on trigger circuit much better You may be able to gin up a circuit to trigger your laser I showed you shapeoko laser area which has a lot on lasers mounted instead of spindle Shapeoko use GRBL board on Arduino so PWM out of pin 12 may be used to control laser since RAMPS is on arduino so you can use a pin on arduino to PWM the la

by cozmicray - Laser Cutter Working Group

Re: Just starting - 6 years ago

Why did you buy this laser? When people advised to get a laser with a separate driver / supply with TTL control. Sort of like --- read, watch youtube and ignore it all This forum may help a lot --- sorry you may have to do some searches / reading J-Photonics expensive but very good, safe, well documented lasers documents are free for the reading Please safety - protect your eyes

by cozmicray - Laser Cutter Working Group

Re: Cyclonit's CoreXY - 6 years ago

Do yourself a favor ditch the rods use linear rails see the digital dentist build

by cozmicray - CoreXY Machines

Re: Printer without belts - 6 years ago

Done in 2012 by TrinityOne 100 orphan printers out there Aluminatus TrinityOne 3D printer using 10 start 25mm pitch leadscrews) SIMO™ linear actuators you may want to try high start leadscrew?

by cozmicray - Look what I made!

Re: A fixed-bed gantry design - 7 years ago

All axes have at least two guide rods except the longest -- Y axis WHY? 5/16" sag in glass base? not good? SW compensation support glass in center? Perhaps an aluminum plate? less sag? What are the advantages of this design?

by cozmicray - Reprappers

Re: Cutting latex - 7 years ago

Laser cuts with heat. How much will the latex shrivel with heat along cut line latex can melt anywhere from 250 F to 350F latex sheeting does vent toxic fumes on vaporization, and leaves some messy residue behind after cutting. You may want to ask some to shoot laser at latex see if it cuts, melts, shinks up I would suppose high power laser to cut quickly (expensive)

by cozmicray - Laser Cutter Working Group

Re: My coreXY design is progressing to the build stage - 7 years ago

Turtle blower Patient respiration -- important --- blower plus driver electronics Has to be very quiet, and secondly it has to respond dynamically and positively to the patient’s respiration requirements. Its air flow and pressure must be continually adapted to the patient’s own breathing. The blower drive must therefore be able to adjust its speed with extreme flexibility. The development en

by cozmicray - CoreXY Machines

Re: Strange situation with stepper motor - 7 years ago

Keeping the motor ON all the time the motor will heat up and get very HOT. Use a motor brake or mechanism to hold axis. A worn drive or counter-balance could work

by cozmicray - Stepper Motors, Servo Motors, DC Motors