When Ford Automotive offered a contract to this Canadian automotive manufacturer for producing rear toe links, the company found its lathes simply weren’t capable of attaining the accuracy required to complete the job.
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Problems multiply on small machines because they have light saddles that can lift, top-slides that might twist, and a bendy tool-post holding a long sticky out parting tool. With parting this can be the wrong answer and sometimes you need to grit your teeth and run the lathe faster and/or stuff the tool in harder to get through the chatter. I think i am going too easy on the feed rate. Want the latest issue of Model Engineer or Model Engineers' Workshop? They depend on the tool, it's exact height, feed-rate, surface speed, and the material. Global automotive manufacturer TRW did just that at its Automotive Linkage and Suspension Systems Division in St. Catharines, Ontario, Canada. Please click here. "I knew that upgrading to Heidenhain linear scales would fix them right up by serving as a reliable direct-measurement source, because they compensate well for many machine imperfections.". Upgrading specific components to address the root of the problem can be a more economical way to improve machine performance.

Although i do sometimes struggle with it. Here are some of our picks for the top dive sites in this magical location, the critter capital of the dive world. Also, may subject an unmodified mini-lathe to unusual stresses since you are now also reversing the forces acting on the carriage - i.e. Training as an adaptive scuba diving instructor means learning how to modify diving so that even more people can enjoy time spent underwater. I did some reading and found that mini lathe users tend to run the machine in reverse to part off. Projects like this have sprung up all over the Caribbean; here’s a bit about what they are and how they work. 32. Oahu, Hawaii. Can we have a picture of Your setup showing lathe,tool and setup? Here are some instructions for using … A rear toolpost for an inverted parting tool is a good thing to have if it will fit your lathe. My lathe came with a rear tool post. It has a cutter holder with a simple blade installed. Though I would not say that was cutting particularly well. He says it is quicker & wastes less metal.

Much depends on the toolholder you have since the cutting point must still be at the centre height of the workpiece. Here are five of the best. Though the tolerance for this part was ±28 microns, the increase in thermal error as the tool moved away from the fixed bearing of the ballscrew caused this part to reach a maximum discrepancy of 44 microns. Though applied for different reasons on different machine types, all forms of compensation allow the CNC user to allow for unpredictable conditions related to tooling. If you are still nervous about parting off (which is perfectly understandable) just use the parting off tool to go part of the way through the workpiece then back the tool out and switch off the lathe. There is no shame in taking this approach, it just needs a little more elbow grease. They are crude, and I mean rough, but they work. The VMS is meant to attach to the cross-slide in place of the topslide. To view it, go to www.mmsonline.com/control. The only thing more worrying is how much trouble the OP must be having to feel that the cut in the video is so good!
Confidence, so that you keep up the feedrate.

I personally have done quite a bit with various blades & always go back to my Eclipse blade in the home made holder. I now use tips from China, held in a thin steel strip which I find work fairly well. 28 Oct 2017 Training Timeline: From a Novice Diver to a Divemaster. Most tech divers have heard of famous sites like the Andrea Doria or the Britannic, but there are plenty more off-the-radar tech dives. And then everything went wrong when it came to parting off the steel. "Thanks to the linear upgrades, there are no more concerns about warm-up or cool-down of the machines. Andy's point should be emphasised - parting-off is famously difficult, and it's much harder to get right on small lathes than big ones. Brass was less trouble than Aluminium and Steel on my mini-lathe, but I avoided parting off preferring instead to saw and face-off. The average feed rate was about 2.8 m/min. Larger work requires slower starting speeds; you also use a slower speed for finishing. Parting off outboard of the centre line of the cross slide and/or top slide is inviting more flex in the machine. We don’t actually know what material he is cutting (only watched the first 3 1/2minutes it took to make one small parting operation). The plant had regularly used its four 30-horsepower lathes on other jobs for about 5 years before the toe link job came into play. I'd like it deleted if possible. Phillip exactly which of the parting blades did you get from ARC? I did not buy the complete holder, just the blade and tip in order to try it out The "holder" was made from what was to hand, but worked so well that I made two. C0 Lathe Blowing Fuses. One component of the rear toe links, which are used to adjust the parallelism of the rear-wheel tires, had to be produced to a tight roundness standard. Use lubrication. I just copied and pasted that link on the iPad, and it works fine, https://www.youtube.com/watch?v=RWhIa-3gMfg&feature=youtu.be&t=98, Edited By Michael Gilligan on 22/10/2020 08:42:37. Leaving your comfort zone (in gradual and controlled circumstances) can make you a better diver. There is no need to move the axes to find the reference position. You will find plenty other threads on here and other places about parting off. I ordered a VMS with my lathe, thinking it would be useful for basic milling operations. and he did mention a spring type holder for threading, which he claimed gave better results. The heat of operation can result in dimensional changes to the ballscrew itself, and the rotary encoder cannot account for these changes. In addition to enabling the company to win the contract, installing Heidenhain linear scales on the lathes reduced scrap rates and the need for frequent operator adjustments. These subjects are the building blocks of training newcomers on a specific CNC machine tool. Probably the trickiest aspect when you haven't done it before is to get a 'feel' for the required feed and speed, for example our natural reaction when things get noisy is to back off and do things more gently. When equipment deficiencies prevent a shop from taking on a tough job, investing in flashy new machine tools isn’t always the most expedient remedy. However, thermal expansion and backlash caused issues on even these successful jobs. I also bought a HSS parting off tool which Arceurotrade said has been tested with the lathe. Grapevine, Texas, USA. For a start there should not be a "." Parting is tricky and there is plenty to go wrong. Follow these steps to ensure success. Seem to remember Sparey made the same point in his book. Then this morning I saw this video, of a chap in the US testing a new tool on the mini lathe. The top-slide is wound way too far out, the idea should be to get the tool supported so that a line down from the tool goes through the toolpost, top-slide, cross-slide, saddle, bed. Mr. Lockhart says the problems were especially noticeable during the daily warm-up of the lathes.


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