Workshop Tooling Archives - Page 7 of 8

March 17, 2018March 22, 2018

Mill Turning on the Tormach PCNC440

I just dared to hit run on my first attempt at Mill Turning. I need to qualify this in that the first run I was cutting air above the set up. It looked OK so I put the real material in the spindle and I got a turned part as designed in Fusion 360. I didn’t part it off and you can see the result below.

Mill Turning is where you place the material you want to shape (usually a rod of some kind) in the mill spindle instead of a milling tool. The tools are mounted on the milling table (see above in the vice) and are completely stationary but move via the actions of the table in the X axis and the spindle in Z. The software is conned into thinking the material is really a milling tool and that the tools are the material.

It has taken me the best part of a week to work out how to model this in Fusion 360 and I have been helped enormously by watching Jason Hughes on YouTube. It involves allocating a different Work Coordinate for the location of each tool.

If I can get this more streamlined and get some better lathe tooling in place to support it, then I will be able to turn clock pillars. This was the last stumbling block in moving to CNC assisted clockmaking.

Tonight I am a very happy bunny. A glass or two of Merlot with dinner perhaps ?

Update – For a full write up on the process and how I got there go to my mill turning page and download the pdf.

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March 10, 2018May 31, 2018

Clickspring Therapy

Some days you walk into the workshop and while you know you have long term projects lurking, you just feel like having a distraction therapy day. For me this usually means adding some tooling in some way or other. Yesterday was one of those days.

While looking around I spotted one of my storage boxes with all the parts I had accumulated to make some table tooling grip nuts as shown by Chris at Clickspring. These are similar to a commercial item. As I now have a tooling plate on the Tormach with a matrix of M8 holes it seemed like a good ‘all in one day’ project and would satisfy my therapy distraction.

Chris did not give any dimensions in his write up but there is more detail in his Patreon video which is subscription only. One gem he passed on was using a piece of 1mm thick material to offset the three jaw chuck to create an eccentricity to the locking nuts.

I have created a page detailing my approach here.

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March 9, 2018March 10, 2018

Sherline Motor Assembly for clock wheel cutting

After completing the write up on the Sherline CNC Indexer for use on the Myford for clock wheel cutting, I realised that an important part of the process was the cutting mechanism itself.

I had adapted the Sherline headstock motor and spindle assembly to mount on the Myford vertical slide to act as a secondary cutting source. I use this for cutting clock teeth and for drilling holes ‘off centre’ to the lathe axis for such processes as arbor mounting holes.

The full write is available as a pdf on the associated page on this site.

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February 22, 2018February 24, 2018

Tormach Tooling System and a Spanner in the Works

Tormach provide a rather nice tooling system for their milling machines. This is known as the TTS. There is a master collet permanently fitted in the spindle. If you have the automatic tool changer option fitted this collet is depressed by a compressed air driven ram. This opens its jaws to allow grabbing of individual sub collets holding the tool of choice.

The great bonus of this system is that you can have all your regular (and not so regular) tools permanently mounted in collets ready to go. Press the button driving the ram and push the next tool home. This also means you can populate the tool table in the PathPilot CNC driver program with all the tool length offsets without having to measure each time you do a setup.

It does mean quite an investment in the sub collets. These are available for all manner of capacities both metric and imperial either with fixed diameter grips or standard ER ranges. There are also custom tools such as the Super Fly and Shear Hog plus fittings to take a Haimer shank.

What was always a fiddly job was mounting a new tool in a collet and trying to contra-rotate the collet tightening nut while holding the body. This is now no more ….. I have just taken delivery of Tormach’s simple but elegant solution to this.

It is a ball race mounted in a block but a ball race that only rotates in one direction. You simply push the collet shank into the ball race and it is gripped tight. To loosen the collet you simply put it in from the other side. Magic !

Now you have probably realised I am a bit OCD and like things in their place and ordered. Having got the tool gripping sorted I would now need two spanners to fit the collets of my most popular ER16 and ER20 nuts. That was one too many spanners for my liking and was tying up standard shop spanners (which also have their allocated place in the shop …. oh dear how sad is that).

Now I happened to have a strip of 50mm wide Ground Flat Stock sat idle and Fusion 360 was calling. A quick drawing on Fusion delivered a customised spanner sized to suit the two most popular sizes of collet I use. I ran the CAM and off to the 440.

I put a piece 6mm hardboard on top of my tooling plate and put a couple of M8 holes at 75mm spacing on the centre line of the stock and fastened it down through the hardboard into the tooling plate on the 440 bed. I made sure the Z clearance was OK for the screw heads (important !) and hit go.

It was the first time I had machined GFS and the 440 handled it well. I now have a nice customised spanner hanging on the wall above that fancy bearing block.

Disclaimer : – This post and many others on my website feature references to Tormach and its products. I have no connection to Tormach Inc financially, commercially or otherwise. I acknowledge that Tormach®, Tormach Tooling System®, TTS® and PathPilot® are all registered trade marks of Tormach Inc.

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December 14, 2017February 24, 2018

Laser Centring Tool for Tormach Tooling System

Frustrated by not being able to use my Myford Mill Laser Centring tool on my Tormach PCNC440 I have done a redesign using Fusion 360 and 3D printing.

Tormach, Fusion360 — Concept View of Laser Centring for Tormach TTS

Read about it here ……

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