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: Electric vehicles|
Yesss Electrical near us have a free recharging point...mind you the electrician I last used on a job went to Yesss because they did free pies on a Friday
|Thread: Rubber mat.|
I just use a couple of layers of carpet offcut...
|Thread: .DXF Files for Meccano Chain Wheels|
Started drawing my version - thing I can't work out is how to establish the centre for the 0.125inch radius? The valley and 'flat' on the tooth I can work out, but finding the centre is defeating me!
Thanks Jason, helpful as ever.
Where can I get hold of meccano chain wheel drawings in .dxf format ?
|Thread: Marking out blueing or pens?|
I started off using acidified copper sulphate solution, mainly because I was learning from books that came out of the Ark's library. Then got converted to a big fat black Sharpie and never needed anything else for marking out.
|Thread: A new [to me ] style of scam eMail|
Just 'block sender' and delete, really not worth messing with. You can track the issuing mail server (sometimes) and eMail a complaint, but I think those 'abuse' mail addresses just point at a delete folder.
|Thread: 6mm Metric Fine Screws in Brass|
Thanks for the kind offer, but I am after quantity. I can manage with 1mm pitch, it's just that 0.75 or .5 would make for a better job.
Looks they have good stuff - but only 1mm pitch in Brass (£1.95 each, so should be good!).
I look to them in future.
Struggling to find 6mm metric fine crews in brass. Looking for cheese head 25mm - 50mm long.
|Thread: Warco Minor mill/drill|
Andy, this is how I added a DRO to the Minor. The DRO is simple type from Arceurotrade. Then I just took a piece of aluminium plate and bored a hole in it to be a slide fit over the spindle assembly. There is a caphead screw out of sight which acts as a locking screw to stop the plate swivelling.
The plate is then useful for hanging clocks off...but you lose the depth stop which I miss very rarely.
I have a graph somewhere of the the DRO readout plotted against the manual readout off the fine feed, apart from a stiction/backlash problem the graph wanders about all over the place!
Warco Minor? I cut these bevel gears on mine and machined the cams for the Nemett four stroke. So the machine does work. You must put a DRO on the Z or it will drive you nuts!
|Thread: Today's delivery|
If it was in bubble wrap inside a 75mm tube and a metre long, it can't have been that bent! If Parcelforce managed to bend it without damaging the tube, then they must have had a touch of the Yuri Geller going on!
|Thread: Opions sought on using the USB Photo Stick for photo storage|
I don't like manual backups of anything, because they get forgotten and the media lost. I have a load of USB sticks. Somewhere.
Cloud storage is often free depending on storage requirements and fully automated and 'always on'.
|Thread: Further Adventures with the Sieg KX3 & KX1|
I notice that the Axminster versions of the KX1 and KX3 have Ethernet interfaces, I guess that is yet another version of controller board. Anyone know which one?
|Thread: Calculating Feedrates for drilling with the Sieg KX1|
Thanks Jason, I calculated manually 3032 rpm and 156 mm/minute which is a bit more aggressive, but I can see that I've been a bit optimistic with the "feed inches per revolution" value. If I back it off to where it should be I get your numbers. I'll go and run with that, see how it works out!
I've been puzzling over the feed rates when drilling with a CNC. I found this table, but it doesn't link to material type. How do I calculate feed rates when drilling?
Recommended Feeds of Various Diameter Drills
Diameter of Drill - Inches Feed Inches per Revolution
Under 1/8 001 to .003
1/8 to 1/4 .002 to .006
1/4 to 1/2 .004 to .010
1/2 to 1 inch .007 to .015
Edited By Steve Withnell on 18/07/2020 17:07:42
|Thread: Which Milling machine and what is its footprint?|
I still have my Warco minor and won't part with it. If you fit a DRO to the Z-axis and think through the machining process when setting up it's perfectly sound. It's also a very good co-ordinate drilling machine. One benefit is that it runs slow enough to cut gears (I've used mine to cut small bevel gears) and run slitting saws.
|Thread: Gear Generator|
I've been using Eagle and that's full on too, but just about got that sorted. I'm struggling at the minute to move from 2D (Vectric Cut2D which is dead simple) to 3D packages.
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