Been putting lots of service time into the Daewoo the past couple weeks, largely because it's finally been cranking a lot of parts out after sitting looking like an 8000lb paperweight for most of its time in the shop.
Friday afternoon we broke a Z-axis ballscrew coupler shear pin while doing a positioning move in air (strange), which led me to discover that the previous owner of the machine had been making his own shear pins... Why he needed a backstock of these I have no idea (or don't want to know). Surprisingly, Doosan still stocks many spare parts for this machine, so I've got new way wipers on the way as well as a new set of X-axis ballscrew support bearings, since it's got the robot-dinosaur noise going on.
Rebuilt the C-axis spindle brake caliper and sped up the clamp/ unclamp time by screwing with some ladder logic timers at the control. In the process, fixed some shoddy repair work someone else had done which included stripping out a 1/8 NPT hole in the damn headstock casting and globbing silicone all over to seal it up. Ended up drilling a hole in the sheet metal to get access with a drill to be able to enlarge it to 1/4 NPT and install a reducer bushing back to 1/8 NPT - the last photo shows my tapping access. The cherry on top is that this hole is the oil pump inlet for the spindle bearings and gearbox, so we had @azfizrof on the shop vac with a tiny tube nose on it sucking the chips out as I was drilling.
Also replaced the spindle oil pump head, in hopes it would be a little quieter, but instead I'm pretty sure it's sightly louder haha. It pumps a ton more oil, so that's good. And the manual spindle speed control pot was blown out so when you would even touch the knob the load meter would peg and the spindle speed would jump around like mad. That was an easy fix compared to all the other ones.
#repairsandmaintenance #shoplife #instamachinist
The art and black magic of knurling... Running a 33" long knurl on one piece of DOM and then a 30" run on another for a project that @pivot.metal is working on.
Where's my y-axis sub spindle turning center?! Working on some parts for @slayerespresso in two machines, and set up for broaching 8mm square holes with the arbor press. Daewoo is casually holding .0002 on diameter thanks to a couple stages of roughing tools and a dedicated @sumitomotool finishing insert. There's another milling op after all this and then the parts get welded to some laser cut paddles, sent out for polishing, and sent to @gaugedesigngroup to have paperstone glued on and finishing touches. Then out into the world so baristas can slap the shit out of them!
#daewoo #milling #haascnc #turning #stainlesssteel
About four years ago I did one of these for @thepolkadotjersey and apparently I saved my notes (and more surprisingly, was able to find them). Another one came through their shop, so it was time to do it again. Merlin titanium frame originally with press fit BB for square taper, updated to external bearing BB for 24mm spindle crankset.
Now That's What I Call a Weird Setup vol. 693
Fairly annoying maintenance job - the battery backup for the CPU on the VF3 was dying, and I wanted it to be slightly more serviceable down the line. Made a quick and dirty battery holder for two of the same battery in parallel, with a pigtail long enough to position it in a more convenient spot in the control cabinet. The hard part was actually soldering the pigtail onto the board... according to the Haas techs that were out here about a month ago, it has to be done with the machine powered up in order to not lose all your parameters. So I find myself back in the corner (the door only opens about 30 degrees) soldering lefty in the most inaccessible corner of the cabinet, with a bunch of live 240V spicy bits right near my chest, and a couple miniscule traces that are about 1mm away from the battery leads I'm soldering to that I probably shouldn't touch. Fun.
Sample stainless bulkhead fitting for @peacevans with waterjet work done by @metalcreaturevashon
#gtaw #stainlesssteel #metalfabrication
I put my thang down, flip it and reverse it
Full color graphics simulation on the new @haas_automation Super Mini Mill - what luxury! Oh and it's crazy fast. Max usable feed on the '93 VF-3 was only like 80ish inches per minute when doing HSM moves and so we weren't really doing real HSM. Hitting about 400ipm on the new machine at 90% spindle load without even really trying to optimize anything.
Anyways, turning a piece of scrap into a disc brake rotor spacer for @ian____t was a good HSM test project.
#runcnc #haascnc #moped #thisonegoesto11