Have you ever hurt yourself from your own code?

Post by Doxin » Mon, May 31, 2021, 7:14 AM UTC

jdiez17 wrote: post #403

Doxin wrote: post #381

Earlier quoted context omitted.

I don't work in robotics so I might be entirely off-base here, but surely the interlock process would consist of hitting an E-stop somewhere? What was this process that took long enough for said manager to get annoyed with?

You usually only hit the E-stop when the robot is moving in a way that could be dangerous. Safety interlocks are intended to minimize the probability of such a dangerous situation. The robot won't move unless all of the interlocks are outputting a "go ahead" signal. The most common interlock is a (switch/laser/hall effect sensor/whatever) that detects the door to the robot cell is closed.

Well yes I know that much, but surely having an e-stop pressed will stop the robot from moving, same as any of the other interlocks? And opening/closing a door or the like doesn't seem like something that takes a long time either...

Post by LeifCarrotson » Tue, Jun 01, 2021, 2:50 PM UTC

myself248 wrote: post #369

speakspokespok wrote: post #206

Earlier quoted context omitted.

Recently I did what’s called the ‘big 3’ upgrade on my car’s wiring. You replace the oem wiring from your alternator, etc. with 1/0 gauge cable, thus allowing substantially more power through. This is for speakers. I made my own cables and was in the process of upsizing one of the battery lugs by drilling the hole bigger on a drill press. I was just holding the wire steady with my left hand while pulling the drill ha…

Having had this happen a few times, I'm pretty obsessive about workholding now. It's a shame that a good drill-press vise can cost almost as much as the drill press itself, because it's really important for safety. You should image-search the term "radial drill" sometime. ;)

Where are you finding these $30 drill presses?

$21: https://www.amazon.com/Irwin-Tools-Drill-Press-226340/dp/B00...

$25: https://www.harborfreight.com/4-inch-jaw-capacity-drill-pres...

You don't need a high-dollar Kurt milling vise for a drill press, and you only need to constrain the part in one degree of freedom (rotation about Z axis). Just put a single fastener in your table and drop the slots in that vise over it. Gravity and quill pressure hold it in Z, the table holds it flat against rotation about X and Y, and you want it to have the ability to slide a bit in X and Y to let the drill find the center of your punch/pilot hole. If the drill catches, the torque will push against the stud and it can't move.

Re: Have you ever hurt yourself from your own code?

Re: Have you ever hurt yourself from your own code?