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In my first post when I talked about getting the higher quality version of the 800W spindle to reduce noise (among other things), I didn't realise that you already had a spindle. I've made the video...

Manufacturers state that its Not OK to oversize or under size VFD . The maximum acceptable is 1 size bigger. I believe its because of trip sensitivity. Obviously 4.5 A rated VFD like the 800W can...

When I was working in industry ABB was always my first choice for drives, I have one on my overhead pin router. I've never used the Chinese ones but there is usually a parameter for switching...

If your concerned about getting the Chinese VFD, which I wouldn't be, bear in mind if you get the 1.5kW or 2.2kW version and run a spindle rate for only 800W then it's always going to be operating at...

I have 800w watercolled spindle and honestly its the quitest thing in my garage. The router bit itself makes 50x noise when routing. if your breakout board do not suppost output of 0-10v the next...

As you probably guessed, the reason I spoke in the youtube video you linked to was so that you could set the volume so that I'm speaking at a normal volume, and judge the noise from the spindle...

Most VFD have a 'run' input that can be driven by a BOB output. The speed input to most VFD is a 0 - 10v analogue signal that some BOBs can output.

What we need us for people to use the sound meter app on their mobiles and measure the actual dBa level 1m from the spindle at a known rpm, say 10k

Hi I have just checked my 800W water cooled spindle for continuity between the outer case & the shaft rotating the shaft by hand the resistance measured varies between 2 & 7 ohms

The efficiency of a ballscrew is typically over 90%, compared to maybe 30-40% for a threaded rod which relies on sliding friction, so you would expect a big increase in feedrate. The torque required...

I have one I'd like to sell, never been used, still in its original packaging.
I just stuck the multimeter on it and there is 100% resistance between the shaft and the body. There is no earth wire,...

ARC has some 180's in stock. £30

Stepper Motors - Arc Euro Trade

Good luck getting that spindle speed with a normal router!

I've got these:...

yep.... that'll about do it for me to :)

to right they do :)


19.8mm (ish)


not at all... thats just me being lazy...just try to put a "small" radius on your tip when your sharpening...

I was just going to suggest if a flycutter would work aswell.

I wonder if a disc style with a single vertically mounted cutter may be better for this, as it'll be more balanced?

19mm or 3/4" would be fine, there,s nothing there in the extra 6mm or 1/4" that will add anything to the design.

4760How would this do you?

Ian

I'm sure some people could, but jonathan has kind of over explained Hanks question.

Basically the 3V is the voltage you could permanently supply to the motor without it going into meltdown. At...

Oh dear, see below for why...



If the switching frequency of the current limiting circuit in the driver is in the audible range, i.e. 20-20kHz (depending on your age!), then you will hear the...

I've turned a short piece of 2mm by clamping it in a 10mm holder turned up then drilled out and cross drilled for a clamping screw. the issue is that any length longer than a gnats will see the rod...

I had to get a custom spring in tin plated steel so it was solderable. Had it made in the UK by Simpson Springs and Pressings. Quote was 12p at 2k pcs, 7.9p at 5k pcs. He used the wrong wire and the...

When I got made redundant I did it, rather a big incentive being thrown on the scrap heap. I bought "Contents of the workshop and work in progress" from the liquidator for £800 and made enough money...

Trying to get anything done in the UK unless you can do it all yourself is a waste of time.
Nothing I have done can be done in the UK due to high costs or short sightedness.

I approached Crawford...

Tell me about it, I'm banging my head trying to go to market with my prototypes. I have proven designs for a proven & profitable market.

All I need is a helping hand to guide me through the...

Aww I'd just finished typing a really long post then the webbrowser crashed :(.
Anyway....take 2

I've seen/used a 'manual' injection moulder at school. It requires a LOT of force to pull the...