Load frame
TOC
Overview
- Forces up to 1 kN (both pushing or pulling)
- Load cells 20N, 50N, 100N, 200N, 500N and 1000N available
- Fully integrated into control and logging system
Actuator
PIMicos MA-35 | |
|---|---|
max. load (in travel direction) | 1000N |
Travel range | ? mm |
min speed | ? µm/s |
max. speed | ? µm/s |
Step width | ? µm |
fine pitch hread | M8 x 0.5 ??? |
Load cells
Two types of load cells are available with different diameters with the following force range
| |
large | small |
|---|---|
20 N | - |
50 N | - |
100 N | - |
200 N | 200 N |
- | 500 N |
- | 1000 N |
thread: M8 (max len 15 mm) | thread: M4 (max len 5 mm) |
Load frame assembly
Considering different applications (high forces, low forces, pushing or pulling) the assembly follows slightly different paths. Generally, assembling the load frame can be broken down into these steps:
- Install a base plate on the rotation stage (use spacers, decide which plate to use)
- Mount load cell on base plate with desired pin or clamp (depending on push or pull experiments)
- Mount sample tube (choose the tube type according to your application)
- Mount pusher
Large load cell installation
For the large load cell a specific base plate has to be used
|
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Base plate with load cell | Load cell with pin used for pulling |
Mount bridge and guide - there are two different types of tube, so assembly depends on your choice of tube:
Tube with thread ring
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Bridge | Brigde and pin guide | Tube with thread ring |
Tube with internal thread
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Bridge | Bridge and pin guide | Tube with internal thread |
Small load cell installation
For the small load cell a specific base plate has to be used
|
|
Base plate with load cell | Load cell with pin used for pulling |
Mount pin guide and bridge - there are two different types of tube, so assembly depends on your choice of tube:
Tube with thread ring
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Pin guide, no bridge necessary | Tube with thread ring |
Tube with internal thread
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Pin guide | Bridge | Optionally: insert push pin | Tube with internal thread |
Sample mounting
Pushing | Pulling | ||
|---|---|---|---|
Bottom push pin |
| Bottom pull thread |
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Top push pin |
| Principle of pull installation |
|
Top push pin |
| Pull clamps for low forces |
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Reference
Moosmann et al. "A load frame for in situ tomography at PETRA III", Proc. SPIE 11113, Developments in X-Ray Tomography XII, 1111318 (2019); https://doi.org/10.1117/12.2530445