Load/unload materials

Composer A4 uses three spool: two of them are common 3D printing filament plastics, and the third one is Anisoprint Fiber.

To load or unload a material you need to press Maintenance > Materials and choose a material spool you want to operate with. Choose load or unload an follow the automatic procedure instructions.

For every material, an extruder must be heated before operation. You can preheat the extruders to speedup the proccess.

The load/unload procedure is split into three steps: on the first step a feeder captures filament and you confirm it through the menu. On the second, stepper motor works at high rate, pushing material to extruder. On the third step, filament is gently transferred to hotend on a lower speed, and you need to confirm the material comes out of the nozzle.

For composite fiber there is a 4th step – you need to remove the cut fiber out of the nozzle using tweezers.

In some cases you might want to just move a material in/out of an extruder. In this case use Movement option as described here.

Another trick is a manual unload of plastic filament. When extruder is heated enough to release the filament inside, just release the clamp of the feeder and pull the filament out.

Z axis calibration

The distance between buildplate and plastic nozzle tip is quite an important parameter affecting the quality of your prints. If it seems that plastic layers are too thin or too thick, nozzle tip scratches buildplate or previous layers or the quality of vertical walls of your model is insufficient due to improper plastic layup, try this procedure.

Press Maintenance > Calibrate > Z axis and follow the instructions. You will be asked to use a thin paper sheet to fine tune the gap between the nozzle tip and the buildplate.

Print any code to verify the results of the calibration, paying attention to brim and first layer layup.

XY offsets calibration

XY offsets define relative position of composite nozzle with respect to plastic nozzle. You typically need to go through this procedure once after nozzle replacement or cleaning.

In order to calibrate, print the special service code NozzleOffsetTest.gcode from the SD card supplied with your Composer A4. You can also download the gcode here.

You will see the following:

To adjust the offsets, use this scheme:

For every axis find the rectangle where the composite thread is right in the middle as shown on the Reference scheme. The distance of this rectangle to zero rectangle is the number you need to add to/subtract from the current offset value.

To change these values go to Maintenance > Settings

After adjusting the offsets, reprint the offset test and make sure that composite thread is properly centered(as on the Reference scheme) for both X and Y zero rectangles.

Buildplate calibration

You may need to go through calibration procedure every time you replace a nozzle or after any other changes affecting relative positioning of the printhead and the buildplate, e.g. shaking or moving the printer. While printing a large part occupying the whole buildplate area, you can notice layer thickness varies from one end of the part to another, which as well means the buildplate requires recalibration.

Caution!

It’s highly recommended to preheat plastic nozzle before calibration as described here.

To start calibration, on the main screen press Maintenance. Choose Calibrate > Buildplate. Follow instructions. First, you will be asked to set the plastic nozzle in approximately 1 mm from the buildplate. The first of 3 points is to be set through the calibration menu, and the left and right corners are tuned manually by adjusting the regulation screws. Second, the procedure is to be repeated for fine tuning, this time using a sheet of an office paper to set the lowest possible gap between the nozzle and the buildplate. The paper must be sliding in the gap with a slight friction. Setting insufficiently low gap will lead to failed prints and printer malfunction.

It is recommended to calibrate Z axis right after buildplate calibration.