Woody – Page 29 – Woody's Workshop

June 19, 2021

Deburring techniques in the home workshop

I don’t know about you but deburring a job after machining I find to be a real pain. This is an important process not just for the look of the finished product but also to give personal protection from the resulting post machining sharp edges.

If it is a CNC job then a small deburring chamfer can be added to the CAM operations but that may not be always possible to easily implement.

A manual deburrer such as made by Noga is another option but on a large geometry job it is difficult to get a uniform profile to the edge chamfers when done with such a manual tool. Inevitably you occasionally slip and scar the surface of the job and this really irritates.

Noga Deburring Set with internal and external cone tools

I do like the cone shaped tool for deburring holes. Incidentally Banggood offer blades and handles that are identical and interchangeable with the Noga range including a series of different sizes of the cone tools. Here are a couple of links to get you in the right direction but there are numerous sources of similar products.

https://www.directnine.uk/products/sp1010-trouble-shooter-set-noga?gclid=CjwKCAjwq7aGBhADEiwA6uGZp8hHRPi6XvgIS6EHCAYGTcIHZUcLzjPcJ1UPpydpJ7Wg8D7EWQW5yBoCocoQAvD_BwE

Banggood DrillPro Equivalent Set

My most recent revelation was to get a deburring wheel. I bought this from Zoro Tools. It is a 6″ diameter wheel made by Bibielle. There are quite a few other sources of this type of wheel. I made an arbor to mount the wheel into my drill press. Deburring wheels are meant to be mounted on a horizontal grinding machine but bench space is tight in my workshop so it has to be a drill press mount as and when needed. I have to say this is a joy to use and gives a quick clean finish to all cut edges. The wheel also gets used for surface cleaning on dirty materials. A useful addition to the workshop and one I wish I had discovered sooner.

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June 15, 2021

3D printed multiple punch holding tool using Fusion 360 Parameters

Using Fusion 360 Parameter Functions on this useful tool

I was pointed to this punch holder idea by a friend. It was shown on HomeMadeTools.net and conceived by Andy Foale.

Here is the link to the original post : –

https://www.homemadetools.net/forum/multiple-hand-stamp-helping-hand-65882

I thought it might be practical to make it as a 3D printed device and with a bit of guesswork came up with a first pass design in Fusion 360. This was based on my set of punches which are 6.4mm square (1/4″) and 58mm long. The design printed in PLA without any problems and the finished punch holder worked fine. It uses one of my printed knobs as mentioned in another post.

3D printed punch holder per Andy Foales — Fusion 360 pictorial view of the finished punch holder

The success led to requests from others who liked the 3D print concept but had different size punches so needed the design tweaked to suit.

This looked like a good excuse to re-familiarise myself with Fusion 360s Parameter functions. In short these allow you to program interrelated dimensions in a design through a series of basic algebraic functions. The end result is a design that is fully flexible on the size of the punches to be used and the number of punches that might be judged needed as the maximum ‘word’ length.

The Fusion file is here in a ZIP file

punch holder v5

The Fusion file includes the holder, the clamping bar and the knob body. You will need a short length of M6 threaded rod and a M6 nut to finish the knob. The file is configured to 6mm punches, 63mm long but you can edit using Parameters function under Modify. Clearly once you have the Fusion file you could run also run a CAM program and CNC cut the punch holder.

I am afraid this is a Fusion 360 file only. If you aren’t a Fusion user (why not ??) and you want a STEP file creating to your punch sizes then email me and I can run it for you.

As stated in the original article, the kerning of the letters is defined by the punch cross section.

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June 15, 2021June 15, 2021

Home made knobs without knurling

I always used to make customised knobs in metal which had a knurled body with a piece of studding screwed and Loctited in place. It was good knurling practice and they looked fine until 3D printing came along.

I now have a variety of ‘styles’ for knob bodies modelled in Fusion 360. These have a hexagonal profile recess together with either a threaded hole or clearance hole modelled into them. A nut is Loctited onto the thread and then the thread with the nut in place SuperGlued into the 3D printed body.

As usual I’m all for an easy (a.k.a. lazy) way of doing things …. here is a Fusion image.

Fusion modelled image of a 3D printed knob

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June 6, 2021

3D printed Myford QCTP dial gauge holder

I bought three Kafer dial gauges in an EBay job lot with a view to making a dual gauge holder as per Clough42’s design.

After some thought I realised that a single holder would suffice by just flipping the orientation of the dial gauge in the holder. Rather than machining the holder I opted to 3D print as this would be sufficiently robust when gripped in the QCTP of the Myford.

Here is the Fusion image and a picture of the finished holder in place. The gauge is gripped in place by two nylon screws. A M5 cap head screw acts as the height adjuster in the QCTP.

dial gauge holder for Myford QCTP — Fusion 360 model of the dial gauge holder to mount in the Myford QCTP

Dial gauge holder mounted in the Myford QCTP — The dial gauge holder mounted in the Myford

The threaded holes are all M5 and 3D modelled in the print. They just need a run through with a tap to clean then up.

The following link has a ZIP file containing the Fusion file and STEP file along with the dimensioning sketch for the QCTP geometry.

Single dial gauge mount ZIP file

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May 29, 2021June 7, 2021

Jerky Mouse Effects with 3D Connexion SpaceMouse and CadMouse used together

Quite some time ago I posted about the fact that I had bought a package deal of the wireless 3D Connexion SpaceMouse and CadMouse devices. Since then I have come to cherish the SpaceMouse and would be lost without it. It makes modelling in Fusion 360 an amazing experience.

Since using this combination I had been experiencing an irritation with the CadMouse lagging and twitchy/jerky in its action. This is not always present every time I use the combination of these two devices but you could guarantee it would raise its head when I was in a rush to finish a design. There has never been a similar issue with the SpaceMouse. I had searched the forums and tried adjusting various graphic parameters but to no consistent result.

The two devices when bought as a package share the same USB wireless dongle. Clearly the pair would be timesharing this data link so I thought this might be a data bandwidth issue. I transferred the dongle to a high speed USB port (the ones with the blue insert). I can’t say this helped or at least there did not seem to be a correlated improvement with this move.

Of late I have switched the CadMouse off completely and reverted to my Logitech M705 wireless mouse with its associated USB dongle. Fingers crossed this seems to have solved the problem. The Logitech behaves well and is responsive to my mouse movements and there is no impact on the SpaceMouse when working on its own into its USB dongle.

Time will tell.

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