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Hello everyone, I'm trying to perform nanoindentation with a Dimension 3100 SPM we have here at the University of Delaware on a range of substrates (thin PTFE films, steel, silicon, glass, etc.) using a TESP tip. The procedure I follow is to engage in contact mode, then move to the 'Ramp' window. I set a threshold voltage, turn the z-closed
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Dmitry, thanks for the reply! You're correct in you assessment that a pressurized chamber would be easier to equilibrate; we actually have the same setup on one of our other instruments in the lab. Unfortunately, a few design constraints led us to try out a vac chamber design instead. Thanks again, Harman.
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Thanks Stefan!
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Stefan, we're trying to make lateral force measurements on environmentally-sensitive coatings. The vacuum we need (as of now at least) is only to hold the bell-jar hermetically over our baseplate since we'll be pumping in nitrogen to make the interior inert. This is why I anticipate our vacuum to be no higher than 0.5 bar. I'll look forward
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Hello, I have sort of a follow up question to my previous post about setting up the Caliber inside a belljar: Would a vacuum of ~ 0.5 bar or less have any undesired/detrimental effects on either the instrument (we have just the Caliber head inside the bell jar, the brick is out in lab air) or indeed the measurements? We're planning on making measurements
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Stefan, As always, thanks so much! I checked the voltages and that helped me find a small voltage leak in our adapter.. cleaning that fixed the problem altogether. The AFM works fine now. Thanks again, Harman.
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Hello, We're trying to operate the Bruker/DiCaliber SPM in a controlled environment within a bell-jar. For the connection between the Caliber head and the brick, we've used a SubD-50 feedthrough adapter (mounted on the feedthough plate) in conjuction with a SubD-50 M/F gender-changer wire. When we wire the Caliber head, the feedthrough, the
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Hi Stefan, Thanks again. Adjusting the PI does get rid of the instability. I do have a related question about the gains. Since I am primarily interested in the lateral (friction) signals, suppose from one scan to another (or within a single raster scan), I were to change the gains, would that change manifest in the raw voltage signals I get for the
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Hi, Sorry to be back on the forum so soon, but I'm having a few issues on the caliber scans that I wanted some help with: 1. I've been noticing for several days that when I engage my tip to the sample (the tip is MLCT-B and the sample is a sputtered coating on steel substrate), as soon as the tip is engaged, the laser spot starts jumping in
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Thanks Stefan, and apologies for the late reply. Mirror adjustment is what I've been doing all along, but I wasn't entirely sure if it's the best way around the problem. Best, Harman.