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Prague REPRAP session Volume 1

Hello everyone, we are planning reprap session in Prague. We expect there will be follow up session on April.

Where - HUB Praha, Drtinova 10

Proudly provided by Virtualmaster

When

  • 2012-03-17
  • main members @9:30
  • 9:30 - 10:00: coffee, donuts, meeting people
  • 10:00 - 11:00: start construction (frame)
  • 11:00 - 12:00: lightning talks
  • 12:00 - unknown: construction

Who

  • netmilk and phokz from virtualmaster
  • Josef Prusa
    • Josef has confirmed printing of parts is in progress and he will come between 10am and 11am
  • @kvbik (jakub vysoky) and his father @JerryFox
  • elmariofredo + 1
  • ang
  • carlos
  • jiri drvota
  • houba

Idea

  • meet people
  • share knowledge and ideas
  • build most of one machine
  • we would like to invite at least one current owner of reprap

Basic links

Shopping list

  • 5 stepper motors (best source needed)
    • XYZ printers from NL
  • printed plastic parts (ebay? Prusa?)
    • Prusa will print them for nice price ;-)
  • RAMPS board (snail instrumets) [phokz will buy one]
    • snail does not have them in stock, use XYZ again
    • parcel from NL will hopefully arrive
  • 4 or 5 motor drivers Pololu1182 (snail instruments) [phokz will buy 4]
    • oh god no!! again from XYZ, 3700Kč for one is rip off
  • Arduino Mega 2560 (multiple vendors)
  • fasteners and rods fabory festo

Printing material

Learning

  • elmariofredo will study printing materials
  • @kvbik will study extruder
  • netmilk will study firmware (program in arduino board)
  • ang will study available 3d models sources

Buying

  • elmariofredo will buy rods, nuts, etc.
  • phokz have ordered and paid arduino mega 2560
    • kvbik will bring one as well from pvelectronic - 1,190 CZK
    • bought from [Ing. Oldrich Horacek])http://hwkitchen.com)
    • total price with shipping 1,257.71 CZK
    • will arrive tomorrow directly to HUB
    • also available at snail instrumets, but too expensive
  • phokz will buy RAPMS and motor drivers from XYZ printers
    • order completed and paid on 2012-03-06, I hope they'll send it in time
    • arrived on 2012-03-16, mostly soldered by phokz
    • 2x female header 1x8pins needed
  • kvbik will buy 5 NEMA17 stepper motors
    • 5 of them from http://www.microcon.cz/prodej.asp SX17-0905
    • order completed (thx to JerryFox and his social hacking skills), steppers should be on Tue 2012-03-13
    • bought by kvbik price=2100CZK including tax and shipping
    • steppers at home
  • ang will buy hotbed
  • netmilk will buy extruder parts
  • netmilk will buy belts x T2.5 timing belt 920mm x T2.5 timing belt 900mm x T2.5 timing belt 840mm

Misc tools and materials to bring

  • screwdriver (phokz)

  • makita (netmilk)

  • drill bits (phokz)

  • soldering iron (phokz)

  • common keys and screwdriver bits (phokz)

  • knife (phokz)

  • gluegun (phokz)

  • tie wraps (phokz)

  • ATX power supply (phokz)

  • little hammer and sharp nail (phokz)

  • All buyers should be assigned before 2012-03-06

Tasks

  • finish shopping list
  • assign ordering of parts to participants
  • invite owner(s) of reprap
  • learn software for printing
  • learn software for modeling objects
  • study printing materials

task invite owner(s) of reprap

  • i have sent info/invitation to RepRap forums
  • invite all the possible guys to RepRap Czech page on Facebook
  • i have sent invitation to Josef Prusa
    • Josef will try to attend
  • i have sent invitation to Tom Petrzela

Other ideas

  • elmariofredo will bring tripod and camera to take some shots

results from meetup

what parts we miss

  • 10 x linearni loziska na pojezd (lm8uu from xyz printer) √ bought by elmariofredo from aurko
  • hlazenka tvrdochrom na hridele
    • not needed for the moment, but for next machines we should use it
    • check prices
    • cnc.inshop.cz
  • sklo 2mm 20x20 - vicekrat
    • phokz will check prices and availability at local glazier shop Valsuba Revnice and will buy 10 pcs if price < 20CZK
    • phokz: price is 59CZK/piece (material, cutting and grinding glass edges), time to delivery is about 3 days
    • phokz have ordered 10 pcs, but others please check availability and prices at your local shop
    • glass at home, final price was 410CZK which is 41 per piece
  • paska na sklo PET
  • aceton na rozpusteni ABS
  • hnaci sroub
    • hobbed nut - we will get one from pepa prusa
  • termistory
    • one is in delayed order from XYZ
    • phokz was in GME yesterday and bought some 5kOhm thermistors, but they should be 100kOhm
    • raprep preferred thermistor is EPCOS B57550G104J, which is 100kOhm NTC
  • material na printeni
  • vyriznout dreveny podpory pod heatbed
    • give me(phokz) a link to current template, I'll cut it from MDF (plovouci podlaha)
  • kvalitni ATX zdroj OCZ (dobry konektory, utahne vic tiskaren)
  • √ elmariofredo pruziny

notes with prusa

  • vizualni navod

  • remenicky zajistit navrtane

  • klinovy remen s lepsim profilem pro kvalitnejsi zmenu smeru pohybu

  • upinani remenu

  • firmware pocitadlo podle typu procesoru

  • firmware sprinter - nejlepe branch experimental (na githubu)

software chain

results from meetup 12/04/02

zapojeni motorku

oranzovy, cerny, modry, bily

misteaks ;)

  • zavitova tyc 3 na extruder a k nim pruzinky
  • nebo delsi srouby 3
  • male podlozky

visual manual

http://garyhodgson.com/reprap/prusa-mendel-visual-instructions/

http://garyhodgson.com/reprap/wades-geared-extruder-visual-instructions/

building in progress

printed parts gotchas

couplings

some parts are different from official "stable" version, eg couplings are made by @nophead, who is creator of alternative mendel version to prusa mendel

http://www.thingiverse.com/thing:9622

http://hydraraptor.blogspot.com/2011/06/yet-another-prusa-z-coupling.html

http://www.reprapturkiye.com/online-store/plastics/48-2/

pulleys

we mounted steel pulleys in wrong direction.. next time if we won't use steel pulleys, we can print em

results from little meetup 12/11/1

  • vycistit sroub

  • rozchodit skeinforge == slicer (kvbik)

    • zpomalit?

  • zvysit teplotu heatbed

    • test vyparit kapku vody
    • zvysit napeti? (jejda - mame 10V viz prechodove odpory)
    • teplovodna pasta mezi sklo a desku

  • zmerit teplotu hotendu

    • teplovodna pasta (lisak)

  • vytvorit penovou desku na izolaci (lisak)

  • zmerit odpor termistoru

  • prechodove odpory na konektorech zdroje

    • 10A draty 2mm^2
    • aby z nej slo opravdu 12V

outputs

  • pocitacovy zdroj uz asi nzdrojuje..

  • zmeril jsem odpory pri pokojove teplote

20.9 Cel - pokoj
110 kOhm - hotend (zeleny kabliky)
113 kOhm - heatbed (modry kabliky)

visit in reprap emergency 12/11/09

@josefprusa visit by @kvbik & @JerryFox

  • mame novy pocitacovy zdroj a s nim je napajeni bez problemu - 12V (Corsair CX500)

  • pepa nevidel, co je v nasem hotendu za problem, ale potvrdil, ze jde ztuha mrkne nam na to a kdyz nebude vedet, co s tim (a ani @arcol mu neporadi) tak nam da jeho novy hotend (prusa nozzle)

  • heatbed snad hreje dost, ale misto obycejne kancelarske pasky ;)) tam mame dat PET pasku -> jemne se zdrsni a potre ABS rozpustenem v acetonu, coz kdyz se udela dostatecne, staci cca jednou po deseti tiscich - jde o to, aby se na desce zachytily kousky rozpusteneho ABS a tisteny model se tam lepe chytal - alternativa je nepouzivat PET pasku a ABS v acetonu natirat primo na sklo - ale pred kazdym tiskem

  • na slicovani pouzivat http://slic3r.org/ - oproti skeinforge je novejsi, rychleji vyvijeny a autor je porad na IRCu (akorat je to v perlu.. :))

  • sprinter (aka firmware do arduina) pouzivame my i @josefprusa z experimental branche

  • pry se nam dost hreje kabel, kterym napajime heatbed

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