Archives par étiquette : silicon

image_pdfimage_print

Heat bed assembly

List of parts :

  • 1 Silicone heater
  • 1 aluminum plate
  • 1 insulation sheet
  • 1 cabled thermistor
  • 1 pen
  • 1 pair of scissors
  • 1 hard card (something like creadit card)
  •  Polyamid tape

 

Place the silicon heater (here orange) in the middle of the aluminum plate.

Take a mark so that when you stick the silicon heater to the aluminum plate it’s located at the center of it.

 

 

 


Return the silicon heater and remove the 3M tape protection .

 

 

 

 


Now remove the tape protection from the silicon heater.

Stick the silicon heater in the center of your aluminum plate.

 

 

 


Take some polyamid tape and cut a length to secure the polyamid on the aluminum plate. The length should be the same as the silicon heater.

WIth your hard card apply the plolyamid tape so that it stick both the remaining exposed aluminum and the silicon heater.

 

 

 

This is made in order to make sure that if for any reason the 3M tape is not sticking anymore you still have the polyamid that will keep the whole thing together.

 

 

 

 

 


The end result should look like the picture.

 

 

 

 


 

Position the thermistor in the center of the silicon heater as shown in the picture, and make sure that the thermistor lead wires are as close as possible as the exit of the silicon heater lead wire.

 

 


Secure the thermistor with some polyamid tape so that is stay well stuck under the heater.

 

 

 


With a cable tie you can attached both lead wires together, make sure that the thermistor lead wire is as flat as possible.

Position the cable tie outside of the alimunum plate area.

 

 


 

With polyamid you can secure the remaining part of the silicon heater (here on the left of the picture).

 

 

 


 

Now place the insulation sheet over the whole assembly. The insulating sheet must have it’s side that looks like aluminum foil toward the silicon heater so that all the infra red heat is sent back to the aluminum plate.

 

 

 

 


 

Now with a pen locate the position of the thermistor wire under the insulation sheet.

Once located you need to remove the part of the insulation sheet the is covering the thermistor wire.

The insulation sheet is doing more than just keeping the heat on the aluminum side, it’s also used to compensate the height of the lead wires under the place so that the aluminum side of the heat bed will stay as flat as possible afterward.

 


Return the assembly that you just prepared.

Looking at the machine from the back, make sure that the silicon heater power cable is exiting on the right as on the picture.

You can fix the aluminum plate to the wooden plate using some of the 4 paper clips provided.

 

 


 

In principle the silicon heater cable going out on the side of the plate should look like the picture, the gap between the aluminum plate and the wooden plate should be very little. It’s possible that we provide you with a 2nd polystyren sheet that is thicker to compensate with this gap a little better.

 

 

 

 


By positioning the wires, make sure to make it pass under the bed as shown on the picture.

 

 

 

 

 


Under the wooden bed, place a plastic clip (here the blue part) and make sure to take both the thermistor and the silicon wires inside the clip.

 

 

 

 


Now  fix it on the wooden plate.

The purpose here is to make sure that the cable doesn’t touche the smooth rod and is going just below the plastic support for the linear bearing (here in grey).

This will avoid any long term deterioration on the power cable.

Note The position of the belt tensioner, the clip is places on the opposite side side of the tensioner, the picture here show the back of the machine

In this position push up the plate and make sure that you have enough free orange wire and that he doesn’t hit the timing belt.

We might provide an extra clip to help you make sure it doesn’t hit the belt.

 

 


Connection of the heat bed to the static relay

List of parts :

  • 4 paper clips
  • 1 AC static relay
  • 2 M4 compatible T-Nuts
  • 2 M4x12mm screws
  • (not provided) 1 screw diver
  • (provided) 1 allen key
  •  plastic clips

 


If you look the chassis from behind, make sure the wires exit on the right exposing the fork or round terminals of the silicon heater on the side of the chassis.

 

 

 

 


Now screw the static relay and make sure to place the 2 terminals with the wave marking (with number 1 and 2) the closest to the chassis back.  The terminals with the « + » and « – » markings (also with numbers 3 and 4) are to be placed toward the vertical aluminum extrusion.

 

 

 


Unscrew the terminals with the wave marking and connect the silicon heater terminals to it.

Make sure you take the terminals with either red or blue colors.

Warning: Make sure to connect those terminals to the proper static relay terminals with the wave marking and labeled24 ~380VAC

 

 


Now screw the last silicon heater terminal with it’s associated static relay terminal.

 

 

 

 

 


Take the protection plastic part to secure the terminals.

This part should be labeled « SSRC »

 

 

 

 


 

One side of this plastic part has a small chamber dedicated to protect the static relay terminals wires wired to the 220V.

The orange wire should be positioned as on the picture.