Here is a list of all the postings daveb has made in our forums. Click on a thread name to jump to the thread.
|Thread: Help wanted, How can I use a stepper motor as a table feed.|
Sorry for the delay in getting back to this.
Many thanks everyone, just what I needed.
It is for a Sieg small milling machine.
It already has a stepper motor fitted to the X axis.
Not sure what it is, has 8 wires and label says (amongst other things) 3.1A.
I have seen adverts for stepper motor controllers (some have pots and switches) not sure if these are the same as drivers or do I need both?
I'm sure this is old hat to many but whilst I'm reasonably proficient in electrical and electronic systems, I've never had much interest in CNC.
Any advice most appreciated
|Thread: Excel Die Filer|
Nice work on the castings. Lovely job!
Sorry, I can't resist it .........................
That's not a die filer, this is a die filer
|Thread: Ultimate Universal Machine ?|
Very nice too!
I do like multi function machine tools.
I have one of the Meyer & Burger S models with some accessories, be nice to have all of them but I would need a lottery win (and a bigger workshop). It seems to be a very capable machine for its size.
I bought a used Impetus (Metalmaster) machine a few years ago, very compact and also with adjustable height headstock. The idea of this was a one machine workshop, with the optional drill attachment, it would do that well. It deserved to sell a lot better than it did.
I doubt that there will be much further development of machines of this type. A CNC spindle and workholder can do everything they do and more.
Still some fascinating stuff out there though!
|Thread: Alba 1A advice|
There are old new Alba shapers and newer new Alba shapers. The later versions all have the motor in the base. Older versions (some were fitted to a precarious looking pillar) may have the motor fitted to the rear of the machine or may have no motor at all but were driven by a lineshaft or wall mounted countershaft. There are detail differences between some of the older ones. Power crossfeed was fitted to all machines, vertical feed was an option.
|Thread: New Nimrods arriving|
|Thread: VFD Question|
Most of the low cost inverters output 220/240v 3 phase. A 415v 3 phase motor needs to have the windings connected in Delta to operate with these. If the windings are Star connected, they are effectively in series. There are 220v in/415v out inverters available but they are expensive, it is cheaper to reconfigure the motor windings.
|Thread: Making a ring mandrel- jewellery tooling|
I asked at a jewellers about making my gold wedding band a bit bigger (my finger is fatter than it was 40 odd years ago). I got a very negative response, the guy said he would have to send it off for an estimate. I decided he could do without my business and did the job myself with a no.3 morse taper and parallel no.3 morse taper socket (as used in turret lathes). Gently tapping the taper into the ring whilst supporting it against the socket, turning it over and checking the size often. This did the job without marking the ring and I finished up by holding the ring on the taper in the lathe and polishing it.
|Thread: Kity Woodwork Machine Switch|
Fit a DOL starter switch at the edge of the bench. Connect the existing plug lead from the motor switch to the OUT terminals and the original plug lead (or a longer one) to the IN terminals.
Edited By daveb on 02/01/2020 21:14:50
|Thread: Bolts & Screws using friction only to hold (or fluted)|
Reshape the hex head of a M20 machine screw and cut a screwdriver slot in the threaded end so you can hold it to tighten the nut.
|Thread: Abracs Quick-lock abrasive tool|
Is this the same as the Clik system used by Dremel?
|Thread: Satellites going over Kent Sussex|
Took me back to standing in the garden with my dad waiting for Sputnik to appear.
That was a few years ago.
We saw it too!
|Thread: Have you got one?|
The bit with the 'flag' should be the other way round.
|Thread: Alexander master toolmaker|
Don't know what the gibs are like on the Alexander but it happens occasionally with Bridgeports, it's caused by the knee gib breaking and locking the knee.
|Thread: Build a watchmakers lathe|
There was a design for a watchmakers type lathe in one of the early MEWs.
Issue 7, reprint on this site, black bar near top of page, click workshop, click tools, click simple lathe.
Edited By daveb on 12/12/2019 14:07:46
|Thread: Chuck backplate mistake|
I've always made the hole as snug as possible because it seemed to me that was how it should be. One of my original Myford supplied chucks was so tight it needed a light scrape before it would fit the spindle. I read several arguments about the fit, more than one stated that the hole should not be a close fit because the register was the back face and not the bore, the thread took care of centralising the chuck. Several of the aftermarket backplates I've bought are a good rattling fit despite which the chucks seem to fit with acceptable run out (for a 3 jaw chuck).
I wouldn't worry to much about a smidgin but you need to keep it below a gnat's whisker.
|Thread: Silent compressor problem|
Bambi compressor BB24V
Thanks everyone. Capacitor seems OK, I fitted a new one, no difference. I previously used it with my Bridgeport Spraymist system, the air usage of which is fairly low. I noticed the compressor getting hot when I was blowing out some carburettor drillings which emptied the reservior two or three times, perhaps I'm expecting too much of it.
Oil level is 1/2 way up the sight glass. After 10 minutes running the casing is much too hot to touch. Motor cuts off when pressure in tank reaches 100PSI. No noises except click when motor starts, very slight vibration when running. I haven't used it much, I bought it to use with my Bridgeport Spraymist coolant system, don't think it was running hot then. There is an external capacitor, I will replace it and see if matters improve.
Many thanks, help most appreciated.
I have a Bambi silent compressor. I used it recently for about 10 minutes and the compressor unit is running VERY hot. The oil level seems OK. Is this a fault or do they normally run hot?
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