|
Hey osha thread, does a water jet also cut the grate that the parts rest on? How often do they need replacement? I imagine you want the grate flat, and it won't stay flat with a bunch of cuts in it?
|
#
?
Jan 3, 2024 14:35
|
|
|
|
| # ? May 29, 2024 19:53 |
|
|
Potato Salad posted:one thoughtless reach for the cut rather than the jig and you can go the rest of your life without a finger, goddam Put a drat handle on your jig idiot, is what I'd tell the idiot that almost lost his fingers.
|
|
#
?
Jan 3, 2024 14:36
|
|
|
Karate Bastard posted:Hey osha thread, does a water jet also cut the grate that the parts rest on? How often do they need replacement? I imagine you want the grate flat, and it won't stay flat with a bunch of cuts in it? the one I have access to uses pegs as standoffs, and as usual with a CNC machine you need to identify where the blank is to be anchored and make sure it's clamped there
|
|
#
?
Jan 3, 2024 14:39
|
|
|
If you're cutting the same thing on it over and over, you basically don't need to replace it - they grating gets a few cut marks in the top of it, but the undamaged part of the grating is still sufficient to support your work piece no matter how long your production run is. If instead you're cutting a whole bunch of different things, then the grating can get cut up in so many different (and very close to each other) places that you need a new one eventually.
|
|
#
?
Jan 3, 2024 14:44
|
|
|
it isn't exactly the same, but when I was using a cnc plasma table, the grid was made of sheet metal, the cut files for which were included with the device's software, so you could replace them yourself so long as you remembered to cut out spares before the old grate gets hosed
|
|
#
?
Jan 3, 2024 14:46
|
|
|
Ironhead posted:I don't have a problem with what he was doing, or the jig he had set up. I do it all the time to cut circles on my tablesaws. My problem was that he turned it the wrong way, had the blade too high, and was trying to take too big a bite. The problem is that, as we see in the video, a half-second brain fart and you lose a digit. I don't care how great and clean the results are -- it is not worth the risk. Table saws are not intended for curved cuts anyway. The fact that they sort of work on convex curves is incidental. The safe way to do this job is to use a bandsaw, and then take the whole jig to a disc sander or something if you need to true it up. Sagebrush fucked around with this message at 15:10 on Jan 3, 2024 |
|
#
?
Jan 3, 2024 15:07
|
|
|
poo poo even a jigsaw would be safer they're cheap too
|
|
#
?
Jan 3, 2024 15:09
|
|
|
Javid posted:it isn't exactly the same, but when I was using a cnc plasma table, the grid was made of sheet metal, the cut files for which were included with the device's software, so you could replace them yourself so long as you remembered to cut out spares before the old grate gets hosed Can't you just run the grate cutting program in place with a blank mounted instead of the grate? I know nothing about CNCing.
|
|
#
?
Jan 3, 2024 15:11
|
|
|
The grate is there to support the workpiece and keep it level under the torch, so no, if the grate is hosed you can't (easily) cut a new one.
|
|
#
?
Jan 3, 2024 15:21
|
|
|
Karate Bastard posted:Here's Jimmy Diresta explaining what never to do in the shop, cutting curves on the table saw included I don't think this is a good instructional, "don't do this" video.
|
|
#
?
Jan 3, 2024 15:24
|
|
|
Space Kablooey posted:I don't think this is a good instructional, "don't do this" video. I mean, regardless, he belongs in the thread
|
|
#
?
Jan 3, 2024 15:39
|
|
|
Sagebrush posted:The grate is there to support the workpiece and keep it level under the torch, so no, if the grate is hosed you can't (easily) cut a new one. But whatever supports the grate has to keep it level as well, no? So that shouldn't be an issue. I'm saying: get rid of the old grate, install a blank in its place, and just cut it there. I have no doubt that I'm missing something. I just don't know what.
|
|
#
?
Jan 3, 2024 15:47
|
|
|
Aramis posted:But whatever supports the grate has to keep it level as well, no? So that shouldn't be an issue. The grate, in my experience, is usually made from strips of steel turned sideways so they're thicker up and down than they are front to back. That way, the machine can cut into the grate a little bit without really worrying about it cutting all the way through the grate
|
|
#
?
Jan 3, 2024 16:03
|
|
|
Aramis posted:Can't you just run the grate cutting program in place with a blank mounted instead of the grate? It wasn't a single flat grate, imagine more like a bunch of pieces that slot together into a grid. Like this thing:  For the most part, the plasma torch on it was finicky ANYWAY, and your workpiece would have to be pretty perfectly flat for it to work. The support grid only touches the workpiece at the little high points it has, so only cuts across those exact spots are degrading the actual work surface, and you can lose a lot of them before sheet metal won't sit flat on it anymore. It's also bidirectional so you can flip it completely over if the top side gets too hosed. We had to replace one, once. It was essentially not a problem as opposed to how many cheap tower PCs we murdered by running them in a metal shop to operate that thing
|
|
#
?
Jan 3, 2024 16:03
|
|
|
Makes sense. Thanks!
|
|
#
?
Jan 3, 2024 16:13
|
|
|
Ironhead posted:I don't have a problem with what he was doing, or the jig he had set up. I do it all the time to cut circles on my tablesaws. My problem was that he turned it the wrong way, had the blade too high, and was trying to take too big a bite.  Edit: that image just doesn't want to show up, it's the one where the guy blinks a bunch and looks at the camera.
|
|
#
?
Jan 3, 2024 16:41
|
|
|
Sagebrush posted:The grate is there to support the workpiece and keep it level under the torch, so no, if the grate is hosed you can't (easily) cut a new one. Can't you just cut a new grate on top of the old retched grate and swap them out?
|
|
#
?
Jan 3, 2024 16:45
|
|
|
LookieLoo posted:Can't you just cut a new grate on top of the old retched grate and swap them out?
|
|
#
?
Jan 3, 2024 17:03
|
|
|
LookieLoo posted:Can't you just cut a new grate on top of the old retched grate and swap them out? There's grates you can get as a kit as part of your consumables. But a lot of newer designs replace the grates with cone like standoffs that reduce the risk of your cutter hitting a standoff during operation
|
|
#
?
Jan 3, 2024 17:16
|
|
|
Space Kablooey posted:I don't think this is a good instructional, "don't do this" video. You think?
|
|
#
?
Jan 3, 2024 17:47
|
|
|
its in the post that you quoted that i dont
|
|
#
?
Jan 3, 2024 17:47
|
|
|
My brain hurts thinking about using a CNC cutter to cut your CNC cutter a new CNC cutter grate. Do you also like to CNC router all your own nuts and bolts? Fully CNC brained and ready to CNC a house.
|
|
#
?
Jan 3, 2024 17:58
|
|
|
zedprime posted:My brain hurts thinking about using a CNC cutter to cut your CNC cutter a new CNC cutter grate. I mean, you can basically print a 3D printer with a 3D printer, and I've done so before
|
|
#
?
Jan 3, 2024 18:00
|
|
|
CommieGIR posted:I mean, you can basically print a 3D printer with a 3D printer, and I've done so before You fool, this is how the PLApocalypse begins 
|
|
#
?
Jan 3, 2024 18:03
|
|
|
Arrhythmia posted:How do you type with oven mitts on? The same way you type with boxing gloves on.
|
|
#
?
Jan 3, 2024 19:40
|
|
|
Powershift posted:The same way you type with boxing gloves on. Punch someone else until they type for you?
|
|
#
?
Jan 3, 2024 19:50
|
|
|
Powershift posted:The same way you type with boxing gloves on. code:
|
|
#
?
Jan 3, 2024 20:08
|
|
|
https://i.imgur.com/Pk7xHBj.mp4
|
|
#
?
Jan 3, 2024 20:31
|
|
|
Fumble posted:im looking for a small belt sander for hobby use and boy the lower end price points sure look like things i want to put my fingers near. Micro-Mark has a decent palm sized belt sander. Not cheap though, since you have to buy the sander as well as their universal transformer to power it. There's nothing else out there for hobby belt sanders, unfortunately, except cheap dangerous Chinese crap. https://www.micromark.com/Micro-Make-MicroLux-Palm-Size-Belt-Sander
|
|
#
?
Jan 3, 2024 20:31
|
|
|
Like a home-grown deer-scarer
|
|
#
?
Jan 3, 2024 21:20
|
|
|
In regards to Waterjet tables: I was over a fab shop at another job that had a $250k Waterjet table. The grating underneath the material to be cut looked similar to this:  We used garnet with the water to cut through 4" plate steel (maybe thicker? It was a while ago). I'm pretty sure the table fills with water to cover the grating so it doesn't get as damaged. They would still get small cuts, but like in the photo above, you can take out and replace small sections when they get to the point where they aren't stable anymore.
|
|
#
?
Jan 4, 2024 00:14
|
|
|
zedprime posted:My brain hurts thinking about using a CNC cutter to cut your CNC cutter a new CNC cutter grate. Flat cutting is a fraction of the complexity as machining out nuts and bolts custom. In the case of the cutting grids, being able to fully replace one in a workday with available materials is an ENORMOUS savings over "well poo poo the table's broken, time to check lead times on parts"
|
|
#
?
Jan 4, 2024 02:35
|
|
|
zedprime posted:My brain hurts thinking about using a CNC cutter to cut your CNC cutter a new CNC cutter grate. gently caress u zedprime i'll cnc a whole dang house if i want starting with the stairs, as is the goon custom https://www.youtube.com/watch?v=Hd-Z7OTAjJ0
|
|
#
?
Jan 4, 2024 03:01
|
|
|
well also they don't make trillions of plasma cutter grid sections a year and sell them in big bins at every hardware store
|
|
#
?
Jan 4, 2024 03:17
|
|
|
Bubblyblubber posted:gently caress u zedprime i'll cnc a whole dang house if i want Wow that looks dangerous. Like two layers at the base of each step. Remarkable. No idea why drooling in screws in those spots would be safer
|
|
#
?
Jan 4, 2024 03:42
|
|
Glory to Italia!
|
Javid posted:Flat cutting is a fraction of the complexity as machining out nuts and bolts custom. In the case of the cutting grids, being able to fully replace one in a workday with available materials is an ENORMOUS savings over "well poo poo the table's broken, time to check lead times on parts" It's this. Those slats are just rectangular strips of maybe 1/16" mild steel slotted sideways into a frame, and the frame the slats sit in is just a strip of maybe 1/8" mild steel with slots cut to hold the slats in place. The jet cuts them every time it passes, but it only cuts them superficially, maybe like 1/4" of their 3" height. The entirety of the bed is a wear item. you cut a new set of parts when the slats start to get too chewed up, or when you come up on a scheduled maintenance. And before anyone asks, the water is slightly alkaline, which stops the steel from corroding.significantly. Bubblyblubber posted:gently caress u zedprime i'll cnc a whole dang house if i want I watched a video a few years back of a couple that built a house using primarily a 5x10 CNC router to cut all of the structural elements from 3/4" sheet goods. I'd be amazed if it cost them less than having a professional build a house of equivalent size with conventional materials. HolHorsejob fucked around with this message at 04:09 on Jan 4, 2024 |
|
#
?
Jan 4, 2024 03:56
|
|
|
ILL Machina posted:Wow that looks dangerous. Like two layers at the base of each step. Remarkable. No idea why drooling in screws in those spots would be safer The lack of a railing makes that horrifying, but the solid glued chunk of plywood that guy has created isn't going anywhere
|
|
#
?
Jan 4, 2024 04:00
|
|
|
There are stairs that have zero material at the bottom, and it’s fine. The bottom doesn’t have to support the weight.
|
|
#
?
Jan 4, 2024 04:05
|
|
|
Javid posted:The lack of a railing makes that horrifying, but the solid glued chunk of plywood that guy has created isn't going anywhere TBF he mentions he's still not done with the project because it lacks a railing
|
|
#
?
Jan 4, 2024 04:14
|
|
|
|
| # ? May 29, 2024 19:53 |
|
|
ILL Machina posted:Wow that looks dangerous. Like two layers at the base of each step. Remarkable. No idea why drooling in screws in those spots would be safer The central post is supporting most of the weight. It's not going anywhere.
|
|
#
?
Jan 4, 2024 04:34
|
|
