View/Open - Scholarly Commons Home

Fig 3.3 Electronics – Assembled view
3.3 Fab @ home Installation and commissioning
After all the parts of the chassis and electronics are fully put together, some final
minor assemblies of the last stage are still left to be completed, some of which are –
levelling the z table, adjusting the motor current, mounting the belt, truing the XY
Carriage etc. To ensure that the two sides of the X axis are driven at the same
speed, the belt is mounted. This is done so that perpendicularity between the X and
Y axis is maintained at all times. Also, to ensure that X and Y rails are perpendicular
to each other, X rails are parallel to each other, Y rails are parallel to each other,
truing of the XY carriage needs to be done. To prevent the motors to be overheated
the current passing through the motors needs to be regulated and hence the motor
current needs to be adjusted. To allow the table to be in level with respect to the XY
carriage, levelling of Z table is necessary. For the deposition tool to maintain a
constant distance from the table during the deposition of material, it is imperative to
have the XY plane parallel to the Z table.
70