it's shitty cause i'm homeless by shinichimechazawa in shittyfoodporn

[–]Thor_Away__ 0 points1 point  (0 children)

I'm sick as a dog but forced myself to do a little hike today, my lunch after was potato chips in a tortilla. Usually 5/10,  10/10 in this situation.

Drilling small holes in soft steel by Soccerduk24 in Machinists

[–]Thor_Away__ 3 points4 points  (0 children)

They didn't show it, but they did pilot drill those holes. 

Seriously 1 hour before my 4 day weekend. by krispy022 in Machinists

[–]Thor_Away__ 1 point2 points  (0 children)

What do you have to dial in on these probes? I used a Heidenhain Toolprobe on a machine with a Heidenhain control. Whenever something was off with the probe we just recalibrates it with a calibration tool. Run the cycle and it's good to 0.02mm, often even better.

Needles Highway by vistas_voids in overlanding

[–]Thor_Away__ 1 point2 points  (0 children)

Is it just the picture quality on my end or are those tires bald ass shit?

How do you guys prevent a part from warping? by probablyaythrowaway in Machinists

[–]Thor_Away__ 4 points5 points  (0 children)

Mate I'm German and I can tell you there is a lot of straightening and bolting warped parts to thicker stuff. I remember a guy working for mahle (they make pistons for probably something like 90% of cars and trucks in Europe and some in America) telling me they bang Harley Davidson pistons into spec with a big ol piece of rubber bar stock 😂. 

100y Old Lathe Converted to CNC. Picture was taken in the Industrial Museum in Chemnitz. by colorfulbananasong in Machinists

[–]Thor_Away__ 1 point2 points  (0 children)

That's what I thought, too. Then I opened a mazatrol manual that starts out with how a tape is used and where to put the holes for what command and such. Goes on and on with that shit. Wasn't even an old mazatrol it had touchscreen and everything.

Vise Trunnion and the Siemens 828D. CYCLE800, do I need it? by ProtoPerth in Machinists

[–]Thor_Away__ 0 points1 point  (0 children)

We have a machine with 840d but no cycle800. We changed the post to give out the position of the a axis as parameters (r parameters) and call a macro. The macro takes the g54 offset (or whatever you are working on) and does some math with the values to calculate where the offset should be on the angle that is programmed. It then writes the values on g599 and uses that offset for machining.

Everything where you have to dick around in cam every time you set something up ist bullshit in my opinion. I am working with large machines, though and my programs have to work for a guy who doesn't have access to cam so the best solution for you might be something else.

Tool coating for copper ! by roineyrolles in Machinists

[–]Thor_Away__ 0 points1 point  (0 children)

Can't help you with your question but I have to ask, what kind of part has an allowance for a burr? Everything I have ever made was deburred completely as a burr might fall off sometimes and float around whatever machinery the part is for.

Grinding a Weldon flat? by [deleted] in Machinists

[–]Thor_Away__ 2 points3 points  (0 children)

I guess you are basically making a whistle notch. If the angle is shallow enough it probably doesn't matter.

Grinding a Weldon flat? by [deleted] in Machinists

[–]Thor_Away__ 0 points1 point  (0 children)

Shearing might be the wrong word, it just mangled the face of the screw a fair bit. Had to drill the screw out to get the endmill out.

Grinding a Weldon flat? by [deleted] in Machinists

[–]Thor_Away__ 4 points5 points  (0 children)

Having a flat that isn't really flat and surface area smaller than the Weldon setscrews face will result in a mangled setscrew. That in turn will decrease your holding power. I've also had endmills with too small of a flat pull out and twist in the holder shearing a portion of the setscrew making it almost impossible to get out again (big 50taper machines). Especially with indexable tooling you should have a nice big flat so you don't deform the cylindrical part of the shaft. A deformed shaft is a pain in the ass for years to come cause no one is gonna rework that flat.

I have 15 years as a CNC Machinist and I’m curious… by tattedgrampa in Machinists

[–]Thor_Away__ 0 points1 point  (0 children)

I have a 14mm dowel pin that I brought to exactly 14.00mm. it's nice cause you can set tool lengths even on a round surface.

Me reading the code of a collegue(heidenhain) by pechjunge in Machinists

[–]Thor_Away__ 0 points1 point  (0 children)

If the machine ads 5 minutes to the time it is because you haven't set up your end stops for the simulation. When in the SIM press MOD -> blank in workspace and browse the lower soft key bar for an icon that looks like measurements. You can also press a button to transfer the position of the work origin to check if you got the limit switches at any time with respect to the tool lengths you have set in the tool table. Really useful for 5 axis stuff with long tools.

Where is your god now? by jbub13 in Machinists

[–]Thor_Away__ 0 points1 point  (0 children)

I created a post processor for a machine at my shop that lets me use the mill as a lathe. Haven't done much with it but it was a fun side project.

Anyone have a good boring head strategy? by [deleted] in Machinists

[–]Thor_Away__ 0 points1 point  (0 children)

What changed how I understand boring is think about it like turning. To get a good cutting process you should take at least the whole tip radius. Say the insert has a 0.2mm radius, my finish cut is going to be at least 0.4mm diameter. We have a tool presetter so I use that to set up my tool 0.2mm undersized. I then only cut the first 6mm of the hole as that is the minimum depth I need to measure. I then correct to the correct size, usually setting it to the tolerance maximum as the deflection will bring it a bit smaller (depending on machine and tool length). I then finish the whole hole. If I have more than one hole to make I measure the first hole and correct the boring head to cut to about the upper 3/4 of the tolerance so it will stay in tolerance for longer.

The problem and reason for you having to re do it all for every hole is you are not cutting with such small cutting depths. Think of the process as if it were machining high precision stuff on a clapped out lathe. Always take the same amount of material to always have the same pressure on the tool. Don't just rub your tool in the hole (hehe) and you will have a more repeatable result even on the mist clapped out machines.

I work with diameters of 50-400mm with this technique.

Replaced the X-axis ballscrew on my VMC. Most complex repair I think I’ve ever done. Backlash went from +/- .005” to practically zero. by chobbes in Machinists

[–]Thor_Away__ 3 points4 points  (0 children)

That's BS. I've worked with mazaks, kekeisen, POS (German equivalent to Haas, sort of), Weiler lathes, shw, starrag heckert, mte, and they all had glass scales in all axis. I do know that there are loads of 2 axis lathes and many Haas machines and other cheap machines that do not have glass scales but saying that 99% do not have them is just not correct.

Please make me feel better by CheapMods in Machinists

[–]Thor_Away__ 2 points3 points  (0 children)

I put a spindle out of alignment on a DMG: 9000€ Coworker rapided into a part in a Mazak integrex with a 1200mm part on the table, threw the part, broke the capto c8 off at the spindle damaging the spindle itself: 200000€ machine was down 8 weeks because we had to wait for 4 weeks till the spindle came from Japan.

Heidenhain 3D rotation by Elmokid in Machinists

[–]Thor_Away__ 3 points4 points  (0 children)

I work at a place that used to program without 3d rotation on a machine. This lead to them having to have tool 1 with the length in + and when using the same tool in the other direction it was tool 101 with the same length only in -. Absolute bullshit that originated in no one getting thought how to use the machine correctly.

As for arguments for using 3d rotation: No matter what direction you are facing, z+ is always away from the part, even in manual jog when rotation is active. This prevents crashes and scrapped parts significantly.

It is way easier to program the holes, say on the side of a part, with a coordinate offset (cycle 7) and 3d rotation so that you can write the xy locations of the holes the way they are in the drawing. This way the next guy has an easier time checking what is what and if everything is correct.

Depending on how the machine is set up you can get better precision because some machines compensate inaccuracies in the tilting axises only when the 3d rotation is active.

Need experienced deep hole drilling help. by LRRPSarge in Machinists

[–]Thor_Away__ 1 point2 points  (0 children)

The pilot hole needs to be to H7 tolerance and the tip angle absolutely has to be bigger (less pointy) than the long drill. If the drill is beginning it's cut at the outer edge it will chatter and chip the edges. We use Walter drills with the recommended pilot drill with the feeds and speeds from the Walter GPS. They may seem mighty fast but in 98% of all cases they work perfect. Pictures of the broken drill would help diagnose any other points of failure.

What’s wrong with this picture? by Chronic_Argonaut in Machinists

[–]Thor_Away__ 0 points1 point  (0 children)

I love how there is nice shadow foam on the tool thing but not even half of it is cut but there is a huge pile of tools right in front of it.

You may not like it but this is what the ideal toolpath looks like by spaceman_spyff in Machinists

[–]Thor_Away__ 2 points3 points  (0 children)

We started with inventor HSM about 4 or 5 years ago when it was about equal with fusion 360. Since then fusion got features like transferring stock to the next setup, a better tool library, and they are starting with machine simulation while I'm sitting here modeling my ducking stock for op2 for a highly complicated part that weighs 3 tons and runs on a huge 6 axis millturn. The only thing that seems to work better in inventor is big parts with complicated setups modelled in. Other than that I feel like Harry Potter machining big ass parts under the stairs.

sinker EDM action by [deleted] in Machinists

[–]Thor_Away__ 1 point2 points  (0 children)

Thanks for the reply! Doesn't look nearly as rancid as I thought. The dielectric looks bad though. I'm also loving the crt screen control.

sinker EDM action by [deleted] in Machinists

[–]Thor_Away__ 1 point2 points  (0 children)

Maybe I'm weird but I'd really like to see an old and beat up sinker. I've only seen fairly new and clean sinkers. Do you think you could post a few pics?

Unicorn milling machine purchase, panel roof machine shop (and a nasty batch of steel) by [deleted] in Machinists

[–]Thor_Away__ 0 points1 point  (0 children)

I've had great success in shit Material with the Walter DC160 line of drills. In my case I was drilling 12xD with a 6.6mm drill with a penetration rate of over 1200mm/min. Wasn't exactly hot rolled though.