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

Proudly provided by Virtualmaster

• 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

• 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

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

• RepRap.org
• prusa mendel sources
• Josef Prusa
• Článek na ROOT.cz
• cesky tutorial s alternativnim heatbedem
• ceske forum
• assembly wiki

• 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

• sample of ABS
  • Prusa will bring some
• sample of PLA
• nice eshop from forum

• elmariofredo will study printing materials
• @kvbik will study extruder
  • i hope http:https://reprap.org/wiki/Wade%27s_Geared_Extruder will be enough
• netmilk will study firmware (program in arduino board)
• ang will study available 3d models sources

• 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:https://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:https://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
  • unfortunately, this order from XYZ printers will not arrive in time
  • http:https://xyzprinters.com/extruders-hot-ends/169-wade-and-arcol-kit-with-hydra.html
• netmilk will buy belts x T2.5 timing belt 920mm x T2.5 timing belt 900mm x T2.5 timing belt 840mm
  • netmilk has bought some belts and pulleys from MEGADYNE CZ s.r.o.

• 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

• 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

• 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

• elmariofredo will bring tripod and camera to take some shots

• 10 x linearni loziska na pojezd (lm8uu from xyz printer) √ bought by elmariofredo from aurko
  • what about LBBR 8-2LS cca 1000CZK per 10pcs
  • could we get quality and affordable linear bearings in czech?
    • order to delivery time from NL is 2 weeks
  • lm8uu here 950CZK per 10pcs
  • lm8uu on Aukro 390CZK per 10 pcs
  • cnc.inshop.cz
• 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

• 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)

• prevod z STL do GCODE

  • http:https://slic3r.org/
  • http:https://reprap.org/wiki/Skeinforge

• python na posilani gcode prikazu do tiskarny rovnou z command line

  • https://github.com/kliment/Printrun

oranzovy, cerny, modry, bily

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

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

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

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

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

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

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

• 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

• 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)

@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:https://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