Guy named Frank at Precision Components in Dayton had been running CNCs since the 80s. He told me I was wasting time dialing in offsets by hand on our Haas VF-2ss when the probe could do it in seconds. But when his probe was off by 0.003 on a tight tolerance job for a medical part, I had to re-cut 12 pieces. Has anyone else seen a probe fail on a critical run?
Had a veteran CNC guy at a shop I used to sub for tell me to reverse my climb/conventional direction on a tricky stainless job. I thought he was crazy since everything I learned said stick to climb milling for finish. Decided to try it on a test piece last month and my tool life jumped from 4 parts to 12 per end mill. The harmonics just shifted enough to stop that chatter I was fighting. Has anyone else gotten advice that went against the textbook but worked out way better?
Kid set the feed at 300 IPM on a titanium part without checking the tool data. Wrecked a $400 endmill in under 30 seconds. How do you train people to respect the machine limits without sounding like a jerk?
Been running a Haas VF-2 for about 3 years now and always had trouble with thread chipping in 6061. Last week I tried using a rigid tap with a little WD-40 at 1500 rpm instead of the usual tapping fluid. Came out perfect on 40 holes for a customer's part. No broken taps, no rework. Wondering if anyone else has found a weird fluid combo that works better than the fancy stuff.
I had a stainless steel part that needed a tight +/-.002 tolerance on a critical bore. Normally I baby step the offset and check twice, but today I just trusted my last tool offset after a quick test cut. It hit right on the money with the mic. Anyone else have those days where you just nail the first try? What do you do when you get that feeling?
Used to think smaller tooling meant better finish till my coworker yelled at me to try the bigger one and the chips flew so clean the machine actually sounded happier, anyone else stick to old habits too long?
Had a whole pallet of 6061 shift during a facing pass cause the vise jaws were greasy. Took me 4 hours to re-indicate everything and re-write the program. Has anyone else had a setup fail that was completely your own dumb fault?
Spent 3 years ignoring tool offsets on repeat jobs, just manually adjusting every time. My buddy at a shop in Denver showed me how he sets up permanent offsets for common tools and now I save about 20 minutes per part run. Anybody else use offsets as a time saver or is it just me?
I spent $200 on a fancy magnetic tool rail setup last year, thinking it would keep my end mills organized. After three months, the magnets lost their grip and a $60 carbide bit hit the concrete floor and broke. Anyone else had bad luck with these magnetic holders?
I was grabbing tools near the break room and some old timer was telling a new guy he NEVER touches tool offsets after setup. Just runs it and hopes. That sounded crazy to me because I adjust offsets ALL the time on our Haas mills. Takes maybe 30 seconds to tweak a wear offset and save a part from being scrap. Does anyone else run into parts that need a tiny offset bump halfway through a run or do yall just let it ride?
I used to think they were a waste of shop space until I ran a job with heavy aluminum coolant mist for 6 months straight and my lungs felt like garbage every shift. What finally convinced me was seeing the difference in air quality between my old CNC and the newer one with a collector - it was night and day after just 3 weeks. Has anyone else had a specific health reason change their mind about shop gear?
I was running a Haas VF-2 at a job shop in Detroit last year when this 60 year old guy walked up and told me to slow my rapids by 10% for aluminum. He said it saves the ball screws and gives better surface finish. Have any of you adjusted your rapid speeds based on material?
I got a small shop space last year in a industrial park near Tacoma and needed my first real CNC mill. I had about $18,000 to spend and had to pick between a 2012 Doosan DNM 500 with 10,000 hours or a new Haas Mini Mill. The Haas was shiny and had warranty, but the Doosan was heavier built and had a bigger table. I went with the Doosan because a buddy who ran one in a production shop told me they just run forever if you keep the way covers clean. Six months in, I have had to replace a couple of limit switches and the coolant pump died last month. But the machine holds tolerance like a rock and I am already taking on bigger parts than a Mini Mill could handle. Has anyone else had to make this kind of used versus new decision and regretted it later?
I finally had enough saved up to get a mill for my home setup after years of borrowing time at a buddy's shop. The Haas was a 2010 VF-2 with 8,000 hours for $18k, but I went with a new Tormach 1100M for about $14k after shipping and tooling. Three months in and the Tormach has been fine for the aluminum parts I do, but I miss the speed and rigidity of the Haas for steel jobs. Any other guys running a home shop go budget and regret not waiting for a bigger used machine?
This older machinist at the shop next door swore he was running 150 IPM on a 1/2 inch end mill in 6061, and I figured he was just blowing smoke. Last month he let me watch him do a job and it was legit, his machine sounded like a monster but the cycle time was half of what mine is. What was the trick or tool that made you eat your words on something in this trade?
Was watching a YouTube video from a guy in Detroit who showed his feed rate overlay and I realized my machine was screaming because I was treating every pass like a finishing pass, not using the extra inch per tooth that solid carbide can actually take, anyone else ever get that wake-up call from watching someone else's setup?
I used to use a simple dial indicator and sweep the table to tram my bridgeport. Did it that way for about 5 years. Then a guy at a shop in Dallas showed me a method with a granite square and a test indicator, which I switched to about 6 months ago. It takes the same time but gives me way less error across the X and Y. Anyone else made a similar switch or still do it the old way?
I bought a 10-pack of Chinese end mills off Amazon for about $50 a few months back. At first they seemed fine, but after the third one chipped on a simple aluminum run I started noticing the finish was always a little off. Turned out they were just barely within tolerance, and I scrapped three parts worth about $40 each before I caught on. I ended up spending $120 on a single brand name carbide end mill that still cuts clean after 80 parts. Has anyone else had a cheap tool pack cost them more in lost time and material than it saved?
Been fighting chatter for months on these 1/8 inch aluminum brackets we run every week. Last Tuesday I tried dropping my RPM from 8000 to 4500 and bumped up the feed rate by about 30%. Used a single flute end mill instead of my usual 2 flute and the finish came out glass smooth. Anyone else found weird combos like this that work better than the book says?
I was so focused on grinding through my shift that I didn't even realize I passed the milestone until the end of the day. Has anyone else had a number like that sneak up on you and make you second-guess your own count?
I see a lot of guys in here adjusting offsets after every single part. For the last 6 months at my shop in Tulsa, I stopped doing that and just let the machine run its cycle unless dimensions drift by more than .002. My scrap rate actually went down from 3% to under 1% because I'm not messing with the process mid-run. Has anyone else tried just leaving the numbers alone and seeing what happens?
Was making brackets all morning and kept wondering why the holes were .015 off until I double checked my edge finder reading. Has anyone else had that sinking feeling when you realize you've been referencing from the wrong edge?
I grabbed a $60 tool setter probe from some no-name eBay seller last month thinking I was saving big over the $300+ name brand ones. It worked fine for about a week, then started giving me readings off by 0.005" randomly without warning. Crashed a part so bad I had to re-run the whole program and scrap $120 worth of aluminum stock. Has anyone else gotten burned by cheap eBay tooling or am I just unlucky?
That thing paid for itself in one afternoon finding a wobble in my vise setup that was ruining every part, has anyone else had a cheap tool save them that fast?
I was running a Haas VF-2 at a shop in Phoenix, and we had a job with 316 stainless that was eating tools left and right. Swapped to a cheaper brand of end mills from a local supplier, and suddenly we got 40 parts per tool instead of 15. Made me wonder if we've been overpaying for name brands this whole time. Anyone else have a supplier swap that actually worked out?