Here is a list of all the postings Steve Withnell has made in our forums. Click on a thread name to jump to the thread.
|Thread: MACH 3 Display Question|
Got too absorbed with the KX1 You are right, the 16:9 ratio screen works well, but using a 23 inch monitor I already had. The Mach3 screens are properly proportioned and there is plenty of room for the Jog flyout. I've a bit of sorting out to do then I will move onto a touch screen.
I've cut quite a few things using CUT2D, I've just cut some holes in a case and have screws in different planes interfering , which wasn't obvious until I machined them! So I could do with a package which will show all features before generating the toolpaths.
The KX1 is really sweet, wish I'd got one years ago! A few trivial bugs the max spindle speed was set at 5,000 rpm, which I've now reset to 7,000 rpm as per spec.
One thing I'm not comfortable with yet is working out plunge rates and suspect I'm being a bit too gentle!
I've just started out on this journey. I'm using Vectric Cut2D as an easy way to generate G code for Mach 3 and it's by far the easiest piece of CAD/CAM software I've tried so far.
Edited By Steve Withnell on 24/04/2019 08:27:59
|Thread: Making Holes in Copper Sheet|
Thanks folks. I've so much going on I'd forgotten I had a set of step drills, if they won't go all the way, I can use a boring bar to get to a push fit with the pipe. The pipe is very short (it's not a plumbing job) around 20mm and needs to be a precise fit, which is why I thought about teasing out to size with a boring bar.
I need to make two holes in copper sheet, nominally 22mm. Nominally, because I want the hole to be a push fit for a selected piece of 22mm copper waterpipe.
One sheet is 1.5mm thick and 55mm diameter overall and the other 3mm thick and 105mm diameter. (If you read the same magazine that I do, you will know what this is for )
My plan was to sandwich each sheet between two pieces of 18mm ply and clamp it down onto the mill table, then drill out to 19mm. Then use a boring tool to creep up to the push fit diameter.
The questions - is this the best way of achieving the goal? What do I need to manage to ensure a nice clean hole and what spindle speed should I run the boring tool at?
|Thread: Using a propane cylinder for partable compressed air.|
As a practical question, just how much useful air can you store? Gas bottles are filled with say propane in its liquid state which vaporises as the pressure is released from the bottle. This allows for a huge volume of gas to be available from quite a small cylinder. Compressed air - the receiver on my 1.5HP compressor doesn't store enough enough for any useful purpose (even running my Victoria or spraying it, the pump is forever kicking in). Amateur mistake, I should have bought a bigger one...
|Thread: MACH 3 Display Question|
|Thread: WT2527 15cc Glow Engine|
Lovely job Craig. Thanks for sharing the photo's, there is a lot of effort required to keep on top of the photo's whilst trying to produce a quality set of parts, which can be tough enough!
|Thread: MACH 3 Display Question|
Thanks John. I'm just setting up a WinXP SP3 workstation and I've found a couple of touchscreens I've found have XP support, one is 4:3 and a couple are 16:9, So just interested to know what aspect ratio Mach3 is designed for.
The 4:3 one I found is meant to be used as a PoS terminal, so might be more rugged than the standard desktop screen.
I have run Mach3 demo version on my laptop, but the aspect ratio looked a bit off, which is why I thought the native design was for 4:3.
I'm looking to buy a new touch screen as my Mach 3 control panel (I don't have Mach 3 to play with yet). Do 16:9 or 4:3 aspect ratio screens work best?
|Thread: Where have all the Mondeo's gone|
And he only had one house - how times change!
|Thread: Help choosing a smartphone|
Just been through this myself. I've seperated the problem into two parts - the phone and the service contract. Three are charging me £12 a month for 12GB of data + unlimited text and calls. So stopped using the house phone for outbound calls. See how much you spend on outbound calls to get the overall cost difference. I 've had the phone for a couple months or so and no matter how hard I use the phone, I haven't managed to use 5GB in a month, so 12GB is equivalent to "unlimited" in my case!
Next problem is then the phone itself. Samsung are fantastic phones, my wife has had them for along time. However, the latest Samsung is £750!!! Not happening. We now have three different Motorola phones in the family and all are good. They are built by Lenovo who have a good reputation. Two of the three were bought as special offers from Carphone Warehouse, service is great and they are easy to deal with. The third was bought from an online outfit offering the phone Moto X4 as the sharpest price, but rapidly turned into a nightmare which took weeks to sort out.
Reading your post, sounds like the X4 (with its 3 cameras and all metal case) is too big and heavy - albeit fantastic value for money. Take a look at a Motorola G5Plus, still big but lighter and it will give you a starting point. It's the right sort of processor and memory capacity to provide at least say 3 years usage before obsolence kills it.
|Thread: When is 9mm not 9mm?|
Another combination to watch for is 1/4" and 6mm in brass and copper round bars. The last two suppliers I've used off eBay don't differentiate between the two sizes...When I asked why they had shipped 1/4inch instead of 6mm, it was because they had 1/4inch in stock...
|Thread: Private Messages|
Mystery solved! I thought my account had been hacked when all these PM's started turning up...
Happy New Year!
|Thread: Myford ML10 headstock bearing play|
The runout on my first lathe was nearly 0.1" and would still make perfectly good parts! Really bad runout will still deliver round parts From a novice point of view (which I will always be at this game), knowing how your machines perform is more important than seeking perfection (which you will never achieve) in them.
Don't buy a collet chuck to make the runout go away - most turned parts are produced in either a 3 or 4 jaw chuck with only a few specialist jobs needing a collet chuck. I have all three - but 75% of jobs are done in the three jaw. 20% are maybe done in the 4-Jaw. A few are done on the face plate. Doesn't leave a lot of jobs that NEED a collet chuck.
I'm definitely with Jim and Hopper on this one.
A more important check might be to see if it is actually turning parallel, rather than taper and work on reducing any taper. This is easy to do - just stick 100mm of 25mm steel bar in the chuck and take a light skim over it's length and see it the start and end diameters are the same. If not - someone in the group who knows the ML10 better than me will advise next steps!
Happy New Year
|Thread: Using a fly cutter|
My first lesson using a flycutter was that the typical ones sold on eBay don't have anywhere near enough rigidity or mass for anything only the lightest of work. I 'made' one one by bolting 25mm square bar (with a piece of 10mm silver steel as a cutter) to the 250mm face plate on my lathe and used that to face off some large chunks off ally. I don't think the finish would have been as good on the mill.
|Thread: What's the strangest project you've ever seen in an old ME or MEW?|
Pretty sure the old Field Marshall was a 12 bore sized cartridge...Dad had one for a short time, think it went for scrap!
|Thread: Which lathe|
Get a C3 and start turning! My critieria for my lathe was it had to be the heaviest I could find that would fit on the bench and be new Chinese. Makes perfectly good stuff. Mind you, I don't get tool room jobs from NASA that often
Crazy decision making criteria, but no regrets at all and it's done a quite few jobs now over the ten years I've had it.
|Thread: Metalworking files - Guidance required please|
I wouldn't buy a set to be honest. I do have a set and pretty much 95% of the time just use the flat No.2. I don't think I've ever used the rat tail. An exception is the CK branded needle files, I use most of them, though again, the round file doesn't get used much.
|Thread: Lathe unwanted taper|
Bit of a tangent - when I was a kid 10 or 11, Grandad asked me if I had a testube I didn't want. I gave him one to make a level - he knocked a hole in the end of the tube and fastened it to a long length of hose pipe. By filling the pipe at one end until water appeared in the test tube he could establish a level over a long distance.
|Thread: How long does it take you to make stuff?|
Years, but I get there in the end...
The very best work I've seen is about infinite patience and the worst was rushed. So long as you are enjoying the process, how long it takes doesn't really matter?
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