8/22/2023 0 Comments Download inch wormsDemonstration of multiple independent probe movements is shown in Video 2 and ( G): (i) with all three probes aligned in height, (ii) all three probes moved together downward, (iii) just the right probe is moved downward, while the left and middle are held stationary, (iv) just the middle probe is moved downward, while the left and right are held stationary, (v) the right and middle probes are moved together upward, while the left is held stationary, (vi) the right and left are moved upward, while the middle electrode is held stationary. ( D–F) An example unpopulated printed circuit board ( D) with 16 drilled vias ( E) for placement of 16 microgrippers in a hexagonal close packed arrangement ( F), with 300 μm center-to-center spacing. Independent current sources are electrically connected to heater coils in the vias, while hardware and software control the sequence of electronic actuation signals. ( C) Schematic of the electronic circuitry. ( B) Side view of a model MPSA microdrive loaded with three tetrodes (right). The top board is fixed, and the bottom board is free to be moved by the piezo. Axially aligned pairs of independently controlled microgrippers are integrated into the top and bottom microgripper PCBs. ( A) A multi-probe single-actuator (MPSA) microdrive with independently movable probes. Sequential electronically controlled probe gripping and piezo extension and contraction (described in Figure 2) are used to translate the probe (white dashed arrow points to the probe tip) in either direction (up or down), as shown in F(i)–(v) and Video 1. The top board is fixed while the bottom board is movable by the motion of the voltage-controlled piezo actuator. Two parallel PCBs, each with the installed microgrippers, are aligned along the probe axis and joined by a single piezo actuator. Schematic ( E) and photos ( F) of the inchworm motor. ( D) Photograph of the top view of the heating coil installed into the PCB. ( C) Photograph of the fabricated heating coil before it is placed into the board. The PCM can be maintained in the microgripper through capillary action and does not exit the bore. When the coil is on ( B), PCM is in the liquid state, and the probe in the microgripper is ‘released’ and can be moved axially through the bore. With the heating coil off ( A), PCM is in the solid state, and the probe is ‘gripped’. A probe is placed through the coil bore, and the bore is filled with a temperature-responsive phase change material (PCM). A resistive heating coil is installed in a printed circuit board (PCB) via.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |