In the PAN008 I loosely describe the new pier that I have built but I wanted to make a dedicated thread for it to see if we want to adopt it as a default.
The biggest issue is that the aluminium extrusions we have listed as the default are a non-standard size, so are typically harder to find and cost a bit more. Additionally, these pieces are heavier, meaning that shipping costs can often be higher.
Similarly, the bottom and top metal plates that we use are designed to be very robust but are also a bit heavier and harder to find. Our default parts list had ebay listings, some of which have since disappeared.
The more standard aluminium extrusions are 40 series, referring to
40mm of at least one of the sides. These are listed as e.g. 4080 for a 40mm x 80mm size. You can see some examples from 8020.net here. In addition to varying sizes there are varying surface configurations: smooth, t-slotted, etc.
The most “standard” of these (as far as I can tell) is the 4040 smooth with t-slots. Of these there are three different types: regular, lite, and ultralite. This refers to how “dense” the extrusion is.
I’m proposing that we use these 4040s as our default for the custom pier.
For PAN008 I ordered the regular version because I was not aware the lighter versions existed (or they just weren’t available in Australia as I didn’t see the option).
My top plate is
120mm x 120mm(~
4.7" x 4.7") and the extrusions are placed in the “corners”, as shown here:
The “regular” version can easily hold all the weight that we want to put on it. The “lite” version should be able to as well. The 8020.net website lists the same Yield Strength (
241.1 N/ Sq. mm) for each of them, which is more than enough. They are all capable of having M8 taps.
For the plates, I think the biggest issue would be to reduce the thickness but we can also certainly reduce the size of at least the top plate.
My bottom plate is probably too small. I’m fortunate enough to be at a University with a metal shop so I just asked them to use whatever spare parts they had.
Current list: Aluminum
12”x12” x 3/4” (
304.8mm x 304.8mm x 19.05mm).
9.41" x 9.41" x .47" (
239mm x 239mm x 12mm)
(I asked for
240mm it is just cut slightly smaller).
Our current list: Aluminum
6”x6” x 3/4” (
152.4mm x 152.4mm x 19.05mm).
4.72" x 4.72" x .79" (
120mm x 120mm x 20mm).
Mine is probably too thick. As you can see mine is also the absolute minimum length/width you could use with the iEQ30 Pro as the mount is flush against the edges:
- Extrusions: 4040 UltraLite aluminium extrusions.
- Bottom Plate: reduce the thickness to about
12.7mm). Keep the length/width at
12"x12"if possible (based on availability).
- Top Plate: reduce the thickness to about
9.5mm). Keep the length/width at
5"x5"if possible (based on availability).
The changes above can actually have a pretty good cost savings, both in terms of materials as well as shipping costs.