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Member postings for Robin

Here is a list of all the postings Robin has made in our forums. Click on a thread name to jump to the thread.

Thread: Workshop Mistakes (True Confessions)
16/03/2023 10:24:49

Noticed the little wire brush that cleared the teeth on the bandsaw had stopped turning. Reached out to give it an encouraging flick...

Thread: Washer for leaking 3D print nozzle?
27/02/2023 10:28:08

Just to state the blooming obvious... if the plastic is leaking passed the thread on the nozzle, then the seal you want to fix should be at the end that stops it ever reaching the thread, not at the end where you can see it emerging as a black glob smiley

Thread: CR-Cells Can Go BANG!
21/02/2023 10:19:53
Posted by Nigel Graham 2 on 20/02/2023 22:30:21:

Robin -

Since the torch was inside my shirt, nestled against my chest, I am a reasonably certain fire was not the cause. Body heat sufficient? I'd not have thought so.

If you throw handfuls into a waste paper basket you can expect a few bangs as they short each other out. Makes you jump.

The contents swell as the cell is used up. Eventually, they leak horrible fumes that denature nearby lead-free solder and stop everything from working. Replace it with good old 60:40 and it all bursts back into life.

I used to get through about 4000 a year and have never known one to detonate without some kind of abuse.

However, as we have ruled out the impossible and everything that did not happen, we must go with whatever is left. I think you are probably right smiley

20/02/2023 12:47:49

If you accidentally incinerate an alkaline button cell the contents boil and the case opens with a crack.

If you short a new one out, it heats up and does the same.

If you accidentally incinerate a box full it can be quite exciting smiley

Thread: Dro advice for mill
18/02/2023 10:57:43

...and if the angles get too weird, there is always the trusty 3D printer smiley

best, Robin

Thread: Do many people run 2 Milling Spindles
08/02/2023 12:54:52

That's the trouble with machine video's on YouTube... Everyone else's machine looks better than yours.

Helps if you ask yourself how they would cut a 20DP gear in cast iron smiley

Thread: Who labelled the X and Y axes for DROs on lathes and mills?
28/01/2023 11:13:05

It's like trying to remember that the word data is plural. Always sounds wrong.

On my lathe the DRO shows numbers for X and Z.

If I want to zero Z, I press the button next to the Z value.

If I want to set Z, I can press the Z button until the cows come home with no effect...

I have to press the Y button instead.

Whoever set it up didn't like the taste of XZ any more than I do. It just sounds icky sad

best

Robin

Thread: Simple PCB layout software
19/01/2023 10:51:14

The easy one is the one you are used to, everything else is a nightmare. I am still using the same Protel I have been using for the last 30 years or so.

Thread: Boxford 8"shaper
19/01/2023 10:48:16

Did you get/are you fixing the vertical feed? I had to tighten up the horizontal before I dared turn it on dont know

I think I want to fit a fridge-style, internal light that comes on when I open the octagonal door. I't a bit gloomy in there.

Robin

Thread: Motor speed with inverter.
06/01/2023 12:19:30

You lot are clever, one little vertical separation missing at the top and I get all confused

best

Robin

06/01/2023 10:54:17

My mill motor plate states that the 3 phase motor is single phase, it does 2300rpm at 50-100Hz.

At the top it says, "FREQUENCY-CONVERTER MOTOR" which seems to mean, "Numbers randomly selected from each side of the VFD.

Wonder if it really could take 100Hz for 2300rpm? When it arrived the VFD was on its' last knockings, perhaps someone tried thinking

best

Robin

Thread: What Did you do Today 2022
26/12/2022 11:20:16

Always let your wind go free

Or it will be the death of thee surprise

20/12/2022 11:15:13

Posted by Joseph Noci 1 on 19/12/2022 11:53:55:

... the Lions keep biting through the collars...

I had some trouble with dormice in the attic once but this is in another league smiley

Thread: Dividing head
05/12/2022 23:02:06

I got the Vevor with the 100mm chuck and think it is incredible value for money. How do they do it at the price?

I became fixated on the backlash and got it down to 0.1 degrees, worst case. Self-defeating because I cannot resist taking up the slop with a quick twist of the chuck before locking the spindle and it would probably be easier to feel 1 degree than 0.1 degree dont know

Thread: The printer port isn't dead! (linuxcnc is cool and powerful)
05/12/2022 11:17:11

Happy days when you could actually take over the timer interrupt with Bill Gates blessing. I still have the original IBM PC Technical reference manual with all the circuit diagrams including the printer port.

It looked suspiciously like IBM made a motherboard with active low interrupts and expansion cards with active high dont know

Rather than do a massive trip to the dump they found a weird edge-triggered interrupt and pretended that was what they always intended. Of course you only got one bite of the cherry, miss the edge and it was gone, but that was how things were and everyone muddled through laugh

bestest

Robin

Thread: What Did you do Today 2022
04/12/2022 13:46:32

Thanks to John Lisles' excellent translation of the XSY AT VFD manual, from this very site, my mill finally has a credible on/off, reverse and speed control for the vertical spindle laugh

Next, I put the same at the other end of the ram for the horizontal motor, or maybe I will do the swivel arm conduit I have planned for those wires dribbling out the side.

So much to do and all of it fun laugh

bestest, Robin

17/11/2022 09:38:54
Posted by John Hinkley on 15/11/2022 17:57:12:

Not just today, but yesterday as well. While waiting for the drawings and construction notes for the Hemingway Kits Chenery V-Twin engine to arrive, I amused myself with this variation on the indexing theme that I employed on my low-profile rotary table and simple indexer projects.

John

Did you get a laser engraver for your birthday? Sometimes I think I could do wonderful things with a laser engraver, particularly graduated scales. I am just not a pantograph sort of person wink

27/10/2022 16:18:21

Springs not here yet so I go for a trial fit. Heeds another 10.8mm of spline dont know

Muggins here forgot that you don't get to use the whole spline length if cut on a horizontal mill.

The mighty Rong-Fu mill drill leaps to my rescue.

I will admit to wilting slightly when I hit this latest set-back, but the deed is now done, all water under the bridge.

Next the wiring smiley

23/10/2022 20:47:18
Posted by Mark Rand on 23/10/2022 19:30:48:

Aha! Probably a far simpler solution than my one of making a completely new driving sleeve, with its internal splines, external keyways and multiple concentric diameters for my 1960's Beaver milling machine. crying

It is nice to have a mill that doesn't sound like a Vickers gun when taking interrupted cuts though!

Edited By Mark Rand on 23/10/2022 19:32:42

A glutton for punishment smiley I have been working on this machine for 2 years now, when I stop that will be it. No turning back face 22

Robin

23/10/2022 18:52:19

Fixing my mill spindle clatter with a zero-backlash sprung second spline thingumabob. Brass seemed like the best bet.

Can't finish it until longer springs and a new threading tool arrive from China smiley

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