#robotics Logs

Oct 27 2021

04:43 AM Tom_itx is now known as Tom_L
10:38 PM Jak_o_Shadows: My ebaz4205 xilinx FPGA board arrived
10:54 PM rue_mohr: how much$$
11:03 PM Jak_o_Shadows: Like 40 AUD?
11:04 PM Tom_L: spartin6?
11:05 PM Jak_o_Shadows: artix-7
11:06 PM Tom_L: that takes the newer tools i think
11:06 PM Tom_L: not webpack
11:06 PM Tom_L: i forgot what they call it
11:07 PM Jak_o_Shadows: Vitis?
11:07 PM Jak_o_Shadows: Yeah, I have that installing now
11:07 PM Tom_L: something like that
11:07 PM Tom_L: mine are all spartin6 or older CPLD
11:08 PM Tom_L: https://www.youtube.com/watch?v=o8lezpJhfAo
11:08 PM Tom_L: i got that board a while back
11:09 PM Tom_L: previously all i had was a small CPLD
11:09 PM Tom_L: that was like 25-30 usd
11:10 PM Jak_o_Shadows: I'm not sure what I'm actually going to do with it
11:11 PM Jak_o_Shadows: I'm unsure how fast I can go with the GPIO
11:11 PM rue_mohr: learn
11:11 PM rue_mohr: and remember that a cpld is just a non-volatile fpga
11:12 PM rue_mohr: and an ASIC is just an OTP cpld
11:12 PM rue_mohr: :)
11:12 PM Jak_o_Shadows: Yeah, it'll be a good learnign experience
11:13 PM Jak_o_Shadows: This particular chip has a ARM A9 co-processor
11:14 PM rue_mohr: oh its not just an fpga then
11:14 PM Tom_L: You need a integratable solvent. Styrene monomer works well. You can get it from a fibreglass supply or by pyrolizing poly-styrene. The monomer will combine with the epoxy so it won't need to evaporate out of the epoxy.
11:14 PM Jak_o_Shadows: nope, has the processor - which has gigabit ethernet
11:15 PM Tom_L: wrong channel but you get it
11:15 PM rue_mohr: Tom_L, ooo, is the UV nail polish epoxy?
11:15 PM rue_mohr: thats a question that came up
11:16 PM rue_mohr: it was that or a <NULL POINTER>
11:16 PM rue_mohr: arg
11:17 PM rue_mohr: Tom_L, your talking to thin it, right? wont that thicken it?
11:19 PM Tom_L: Q: The epoxy that I am working with is UV curable with a cycloaliphatic epoxy resin base. I am trying to reduce the viscosity. Whatever I add to thin the epoxy, it needs to be able to evaporate off so that when I cure it, it's just the epoxy remaining. I have used solvents like acetone to thin 2 part thermal cure epoxies, but I am not sure if this is appropriate for a UV cure epoxy or which solvent would be best to use.
11:19 PM Tom_L: A:
11:19 PM Tom_L: Adding solvents that need to evaporate, to your epoxy, can cause pinholing. You need a integratable solvent. Styrene monomer works well. You can get it from a fibreglass supply or by pyrolizing poly-styrene.
11:19 PM Tom_L: The monomer will combine with the epoxy so it won't need to evaporate out of the epoxy.
11:20 PM Jak_o_Shadows: The xilinx installer is downloading at 300 KB/s ...
11:20 PM rue_mohr: yea k
11:20 PM rue_mohr: Jak_o_Shadows, not good, its a 125M package
11:21 PM rue_mohr: or is it larger now
11:21 PM Jak_o_Shadows: Yeah, larger, 50 GB
11:21 PM rue_mohr: good news, they compressed it
11:21 PM Tom_L: webpack was 6G
11:21 PM rue_mohr: ah
11:21 PM rue_mohr: so, what do you think they put in 50G? I'm guessing a docker image of at least 15 machines that have program components
11:22 PM Jak_o_Shadows: Honestly, it just looks like a couple of versions of modified eclipse
11:22 PM rue_mohr: I could fit 25 machines in an uncompressed 50G archive
11:22 PM Tom_L: https://www.woodshopnews.com/columns-blogs/a-primer-on-uv-cured-coatings
11:22 PM Jak_o_Shadows: I have the hard-drive space for it, so meh
11:23 PM * rue_mohr clicks "like" on toms link
11:23 PM rue_mohr: maybe too much twitter?
11:23 PM Tom_L: and now it's past my bedtime
11:23 PM Tom_L: later..
11:24 PM rue_mohr: gnight, thanks.
11:24 PM Tom_L: fix my rotary following error now :)
11:25 PM Tom_L: i got further than expected tonight so meh
11:26 PM rue_mohr: you didn't say what the error is