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# With a 5mm drill bit, ream the holes in the printed parts where the carbon fiber rod will pass. Note that the holes for the cross rods extend only half way through the bearing saddles. Do not over ream the holes, the carbon fiber rod should fit tightly in them.
# With a 5mm drill bit, ream the holes in the printed parts where the carbon fiber rod will pass. Note that the holes for the cross rods extend only half way through the bearing saddles. Do not over ream the holes, the carbon fiber rod should fit tightly in them.
# [[File:MOST_HSPrusa_y-carriage_11.jpg|thumb|right|Assembled corner piece.]]Place an M3 x 16mm cap screw through the hole in a corner such that the head of the screw is on the side opposite the nut trap. Thread an M3 nut on the screw and pull the nut towards the trap. Use a 2.5mm Allen key to tighten the screw and pull the nut fully into the nut trap. Both the head of the screw and the nut should be fully in their respective recesses. Thread another M3 nut onto the screw. Repeat with remaining corner pieces.{{clear}}
# [[File:MOST_HSPrusa_y-carriage_11.jpg|thumb|right|Assembled corner piece.]]Place an M3 x 16mm cap screw through the hole in a corner such that the head of the screw is on the side opposite the nut trap. Thread an M3 nut on the screw and pull the nut towards the trap. Use a 2.5mm Allen key to tighten the screw and pull the nut fully into the nut trap. Both the head of the screw and the nut should be fully in their respective recesses. Thread another M3 nut onto the screw. Repeat with remaining corner pieces.{{clear}}
# [[File:MOST_HSPrusa_y-carriage_15.jpg|thumb|bearing saddles with bearings.]] Insert wire ties into their slots in a bearing saddle. Make sure that the bearing seat is clear of protrusions and firmly push a bearing into its seat in the saddle and secure it in place with the wire ties. Repeat with the remaining bearing saddles.
# [[File:MOST_HSPrusa_y-carriage_15.jpg|thumb|bearing saddles with bearings.]] Insert wire ties into their slots in a bearing saddle. Make sure that the bearing seat is clear of protrusions and firmly push a bearing into its seat in the saddle and secure it in place with the wire ties. Repeat with the remaining bearing saddles.{{clear}}
# For the following steps, keep the solder pads on the heated build platform nearest you, so text is properly oriented and facing you. Place a left and right corner piece at the top and bottom of the heated build platform oriented so that the holes for the carbon fiber rod are nearest the interior of the platform.
# For the following steps, keep the solder pads on the heated build platform nearest you, so text is properly oriented and facing you. Place a left and right corner piece at the top and bottom of the heated build platform oriented so that the holes for the carbon fiber rod are nearest the interior of the platform.
# [[File:MOST_HSPrusa_y-carriage_13.jpg|thumb|Corner piece attached to heated build platform]]Attach the right corner pieces to the board as shown with the platform sandwiched between two washers and nuts. Do not tighten the nuts.
# [[File:MOST_HSPrusa_y-carriage_13.jpg|thumb|Corner piece attached to heated build platform]]Attach the right corner pieces to the board as shown with the platform sandwiched between two washers and nuts. Do not tighten the nuts.{{clear}}
# [[File:MOST_HSPrusa_y-carriage_18.jpg|thumb|Right corner piece with carbon fiber rod.]]Push one end of the 200mm long carbon fiber rods into the right corner piece as shown.
# [[File:MOST_HSPrusa_y-carriage_18.jpg|thumb|Right corner piece with carbon fiber rod.]]Push one end of the 200mm long carbon fiber rods into the right corner piece as shown.{{clear}}
# [[File:MOST_HSPrusa_y-carriage_19.jpg|thumb|Corner piece, saddles and rod]]Push on a pair of bearing saddles with the holes for cross rods facing towards the interior of the platform.
# [[File:MOST_HSPrusa_y-carriage_19.jpg|thumb|Corner piece, saddles and rod]]Push on a pair of bearing saddles with the holes for cross rods facing towards the interior of the platform.{{clear}}





Revision as of 19:47, 23 May 2013

Y-carriage

Printed Parts

Description Count
Belt dog/spacer 1
Left hand corner 2
Right hand corner 2
Bearing saddle 4

Vitamins

Description Count
185mm x 5mm carbon fiber rod 2
200mm x 5mm carbon fiber rod 2
M3 x 16mm cap screw 4
M3 nut 12
M3 washer 8
Heated build platform 1
10k ohm NTC thermistor 1
400mm 16AWG speaker wire 1
400mm 28AWG twisted pair 1
Small wire ties 10
5 Minute two-part epoxy A dab'll do ya

Assembly - Summary

  1. Prep printed parts
  2. Test fit components
  3. Epoxy parallel rods to corners
  4. Epoxy cross rods to bearing saddles
  5. Affix thermistor to heated bed
  6. Solder on conductors

Assembly - Step-by-Step

  1. Ream the screw holes in the corner pieces with a 3mm drill bit. Clean out nut traps with a sharp knife.
  2. Clear obstructions from the wire tie slots in the bearing saddles and any lumps on the surface where the bearings will rest.
  3. With a 5mm drill bit, ream the holes in the printed parts where the carbon fiber rod will pass. Note that the holes for the cross rods extend only half way through the bearing saddles. Do not over ream the holes, the carbon fiber rod should fit tightly in them.
  4. Assembled corner piece.
    Place an M3 x 16mm cap screw through the hole in a corner such that the head of the screw is on the side opposite the nut trap. Thread an M3 nut on the screw and pull the nut towards the trap. Use a 2.5mm Allen key to tighten the screw and pull the nut fully into the nut trap. Both the head of the screw and the nut should be fully in their respective recesses. Thread another M3 nut onto the screw. Repeat with remaining corner pieces.
  5. bearing saddles with bearings.
    Insert wire ties into their slots in a bearing saddle. Make sure that the bearing seat is clear of protrusions and firmly push a bearing into its seat in the saddle and secure it in place with the wire ties. Repeat with the remaining bearing saddles.
  6. For the following steps, keep the solder pads on the heated build platform nearest you, so text is properly oriented and facing you. Place a left and right corner piece at the top and bottom of the heated build platform oriented so that the holes for the carbon fiber rod are nearest the interior of the platform.
  7. Corner piece attached to heated build platform
    Attach the right corner pieces to the board as shown with the platform sandwiched between two washers and nuts. Do not tighten the nuts.
  8. Right corner piece with carbon fiber rod.
    Push one end of the 200mm long carbon fiber rods into the right corner piece as shown.
  9. Corner piece, saddles and rod
    Push on a pair of bearing saddles with the holes for cross rods facing towards the interior of the platform.


  1. Place the heated bed printed side up
  2. Bend the leads on the thermistor so that it acts as a tripod with the bead acting as one leg
  3. Thoroughly mix a small amount of epoxy. Apply a small amount to the middle of the heated build platform (circle-x). Roll the thermistor bead in epoxy and place the bead on the dab of epoxy on the heated build platform
  4. Allow the epoxy to set for 20 minutes

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