Macro Wire Crack
Coleman John
However, the pre-processor doesn't seem to do the right substitution. There is a syntax error on the assign line ("syntax error near 'suffix'), but there is no syntax error if the assign ... line is commented out but the wire ... line isn't.
In my design , i have some macro's , whose pin width is more than the default width of routing. So, i wanted the nanorouter to route this using default width and while making a hook-up to macro pin , the width has to made equal to width of pin.
I don't know of an automated way to do this, but I'm curious why it's even necessary. If you really need to do it, the "hard" way is to hand route out from these pins a little bit (which would make them SPECIALNETS since you're forcing a NONDEFAULT width), then let Nano take it from there.
In the end to make to work I was forced to change the Macro. I still had one additional problem. The stop button we are using is connected directly to the PM240-2, and the start button to a digital input. In theory this will work one time only. The problem is that to start the drive again the ENABLE bit must first fall away. So to do this I used a Free Function Block ... NOT ... to invert the status of the STO safety input. And then connect this bit to P3330 which is the 3 wire control command 1 (the STOP).
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Despite the significant progress made in previous studies, there is still a great problem: off-center impacts result in increased contact times (τ) that become similar to the values (τo) observed on an SHS.12, 13 Such inhomogeneities greatly limit applications, because the droplet mobility generally needs to be enhanced over an area rather than on a point or wire. To avoid such off-center impacts, the present work proposes that macro anisotropic SHSs (macro-aniso-SHSs) with more macroscopic parallel wires could be a promising solution since every droplet impact can be influenced by at least one or more wires. Moreover, altering the spacing between wires might allow the contact time to be tuned. Furthermore, the droplet impact in the groove could produce new impact dynamics, causing the impacting drop to spread in two opposite directions of the groove.
Surfaces with macro and micro stripes were fabricated with three-dimensional printing technology using an Envision TEC machine and E-Denstone 3SP (ENVISIONTEC GMBH, Gladbeck, Germany) as the material.
When the spacing size was continually increased, the contact time with the impact center on the stripe remained constant (Supplementary Figure S4), whereas the contact time with the impact center in the groove increased gradually and reached a similar contact time as that of the micro-aniso-SHS control sample (Supplementary Figure S5). Therefore, a suitable spacing range should be chosen in order to reduce the contact time.
Based on the above observations, the impact position did not significantly affect the contact time, but it markedly influenced the hydrodynamic behavior. In particular, the new hydrodynamic phenomena needed to be elucidated, including the macrogroove confining the spreading, fragmentation and flying-eagle shaped bouncing phenomena. To the best of our knowledge, this behavior has not been previously reported.
Here, a simple mechanism is proposed to interpret the above-observed easy-breaking character observed as Figure 5 shows. Owing to the geometric confinement, the spreading drop in the groove had to concentrate its momentum in two opposing directions, leading to an extended spreading length and accelerated spreading speed. In addition, the entrained gas film below the leading edges resulted in more curved spreading and created a liquid neck, which collapsed with time due to capillarity.29 The increase in the spreading velocity led to an increase in the capillary number where η is the viscosity of the liquid and U is the moving speed of the spreading drop and in turn triggered the instability of the edge sides and the resulting easy break-up behavior.
Schematic mechanism of the hydrodynamics of the drop impact in the groove. (a) The hydrodynamics model of the flying-eagle and break-up behavior in the groove. (b) The spreading state shows different wetting statuses for the different parts. (A) The central part of the impacting droplet enters in the groove cavity and exhibits a Wenzel state. (B) The adjacent parts of the impacting droplet enter into the groove cavity and show a transition state between the Cassis and Wenzel state. (C) Both sides of the impacting drop enter into the groove cavity but do not touch the bottom of the groove, showing a suspended state.
The spreading state of the drop after impacting the substrate (Figure 5b) had a dominant role in its subsequent behavior. Driven by the increased inertial force due to momentum anisotropy, the drop spreading was also bound by an additional inward retraction force, that is, the Laplace force (where θ is the apparent contact angle and r is the width of the groove or spacing between two stripes), which was generated by the groove. This force is related to the contact model of the droplet and the groove. Upon impinging the surface, the central part of the spreading droplet entered the groove cavity more easily than the edge sides (Figure 5b). Therefore, three states could occur during drop spreading in the groove. The central part of the impacting droplet enters into the groove cavity and exhibits a Wenzel state (state A), the adjacent parts of the impacting droplet bend into the groove cavity and show a transition state between the Cassis and Wenzel state (state B), and both edges of the spreading drop enter the groove cavity but do not touch the groove, exhibiting a suspended state (state C). As a result, the edge parts in state C, without touching the groove, spread the fastest due to the absence of an additional retraction force. The adjacent parts spread slower and the central part was the lowest because of the additional retraction force according to their contact area with the groove. In other words, the total frictional resistance in groove has been shown to be significantly reduced when the liquid phase does not enter the groove cavity regions.30, 31 The differences in speed were evidenced by the moving directions between the first and second child droplets shown in Figure 4b. In addition, due to the additional inward Laplace force, the retraction of the contact line was also accelerated by the groove when the edges were still expanding outward. Thus, the synergy of the accelerated spreading edges and the increased retraction of the contact line led to the flying-eagle shape and easy fragmentation characteristics of the new hydrodynamics.
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