#robotics Logs

Mar 31 2018

04:32 AM LuminaxWk is now known as Luminax
05:37 AM voxadam_ is now known as voxadam
10:41 PM Jak_o_Shadows: I have decided that the stupid silver J-head style thing gets too hot to print PLA without a ducted fan
10:41 PM Jak_o_Shadows: a fan blowing over it doesn't do much
10:57 PM rue_: you have to have a fan over the extruder heatsink...
10:57 PM rue_: only when I used quartz did I not need a fan
10:58 PM Tom_L: rue_, have you ever made a sin cos encoder adapter thingie?
11:02 PM Jak_o_Shadows: My old extruder didn't need it
11:02 PM Jak_o_Shadows: well, it didn't need it to be ducted
11:02 PM rue_: Tom_L, yes
11:02 PM Jak_o_Shadows: cause it had the PTFE lining
11:02 PM rue_: adapter?
11:02 PM Tom_L: for glass encoder scales
11:03 PM rue_: I have some sin/cos resolvers
11:03 PM rue_: I dont remember writing code
11:03 PM Tom_L: adapters for these are $$$
11:04 PM Tom_L: https://www.enclosureclimatecontrol.com/motrona-si251-sine-cosine-interpolator-for-sine-cosine-encoders/
11:10 PM rue_: why?
11:11 PM Tom_L: someone has a bunch of scales and needs adapters
11:11 PM rue_: hmm
11:11 PM rue_: some $2.50 STM32 would do a quick job of it
11:11 PM Tom_L: might be cheaper to get the whole thing from ali
11:12 PM Tom_L: https://tinyurl.com/y72nzasb
11:17 PM rue_: dude!
11:17 PM rue_: thats it!
11:17 PM Tom_L: what?
11:17 PM rue_: thast how I put redundant sensors on the mecha joints
11:17 PM rue_: sin and cos
11:17 PM Tom_L: ahh
11:18 PM rue_: if the radius is too far out I know one failed
11:18 PM Tom_L: so we did something groundbreaking here?
11:18 PM rue_: and I can guess the other for failsafe
11:18 PM rue_: maybe
11:19 PM rue_: I was pondering the problem for a while as how to put redundant sensors on the mecha joints and have a way for it to know if one failed and ignore it
11:19 PM Tom_L: some resolvers have backup built in
11:20 PM rue_: I'm using pots
11:20 PM rue_: $240 project, remember?
11:20 PM Tom_L: i know, just saying...
11:22 PM rue_: I still need a solution to the feedback actuator problem
11:22 PM rue_: it might lie in a bunch of vibrator motors tied to some kinda actuator
11:25 PM rue_: so I prettymuch have this flurry library converted
11:25 PM rue_: need to go to the shop to try it tho
11:26 PM rue_: bedroom isn't equipped
11:26 PM rue_ is now known as rue_mohr
11:45 PM Jak_o_Shadows: I know that feeling. I've been meaning to put a vice by the main computer