Here is a list of all the postings Ian P has made in our forums. Click on a thread name to jump to the thread.
|Thread: Motor for Chester Champion Mill|
Did you realise you were replying to a thread that has been dormant for seven years Tim?
I came across the thread last night and something odd in one of the pictures made me curious, I assumed the original problem has been solved long ago and whilst I thought of copy/pasting the picture into a new thread it would probably still have needed a link to this old thread to put in context.
Any idea why part of the picture is mirror imaged?
Sorry to resurrect an old thread but I have the white version of this Champion mill and I am filling up some time by putting it to first use. I bought it incomplete ex showroom at a Chester Engineering open day about ten years ago and it still has its coating of Chinese grease. The motor and some of the handwheels are missing so getting it operational should be fairly straightforward.
What I am curious about though is the 'CE' marking in Johns machine (mine has no such label) but the characters in the picture are mirror imaged, but the machine itself isn't!
Maybe this was a dodge to circumvent copyright (before 'China Export' became the explanation for CE)
|Thread: How can I use this motor economically?|
I have 'parked' the servo motors and drive for the time being and am fitting a standard motor and VFD to the linisher. There are no Hall sensors in this motor particular motor, The picture is the inside of the motor terminal box and the only wires exiting the motor itself are the three thick wires plus two white ones (probably the thermal sensor).
The manual linked to is a shorter version of the one I have but is essentially correct.
Thanks Robert, I'm not sure if this motor has integral Hall sensors but even if it did there is quite a lot of work (and some expense) to get it running. Even then it would be a fairly dumb system compared to what features even a cheap VFD has (accel/decel etc etc) so. Since I have three of the motors and two drives (one faulty) putting them on eBay is what I think I will do.
I thought it might be best to wait until things get nearer to normal but I've just looked at eBay help pages and surprisingly they say its mostly business as usual.
Thanks for the info and suggestions, I know in my heart that making use of this type of motor without a suitable servo drive is not possible and its unrealistic of me to expect to find an economic way of doing it.
As mentioned the 'personality' and the configuration of the drive is stored in a eeprom so no battery involved, why this became corrupted just by unplugging and reconnecting to the mains is a mystery as its something I have done frequently. Using it to drive a linisher is almost a criminal waste of technology but the motor and drive were lying around spare when the original grotty induction motor burnt out. I have the customer version of the Windows 'BRU Master' software which allows configuring all the drive parameters but when I connect it to the drive it communicates but then reports the corrupted NV memory (as does the drives own error number).
I do have a second drive unit and motor which are currently working and fitted to a X1 size mill, I very rarely use it so could borrow the drive off that but as suggested it would probably make more sense to fit an induction motor with VFD and then sell the servo motors and drives I have (used kit seems to fetch high prices especially in the USA).
Joe's comments and recollections about the motor only running synchronously make it totally unsuitable as a machine power source, I could imagine with determination it would be possible to incorporate a feedback system and then drive with a VFD buts it not something I could tackle.
Just to mention as an item of interest. I control the motor speed and direction using the drive's analogue input (+/-10V) with a pot and toggle switch. Even at 4000rpm clicking the switch between forward/reverse is utterly drama free with the motor changing direction almost imperceptibly. If I had the expertise then using one of these as a direct drive lathe spindle motor would be ideal for ELS purposes.
I have been using this motor and its drive unit for several years in my linisher. Last week I unplugged it from the mains whilst I was having a tidy up and now it does not work. I have the full Electro-Craft manual for the drive and motor and the fault error number the drive shows is one that can only be repaired by board replacement followed by reconfiguring using software only given to authorised repair houses, in other words very expensive!
As I do not need any of the servo functions but if possible would like to use it as a plain (hopefully variable speed) motor. I wondered whether it could be driven by a VFD, its rating plate describes it as an 'AC Motor' although it contains magnets on the rotor so its not a conventional induction motor.
If it means anything to anyone here the motor is an 'H-4030-M-H-00AA'. Its continuously rated at 1.1KW 240V and runs up to 4000rpm. There are only 3 wires to the motor itself (plus another 20 or so to the shaft encoder)
There are companies that supply refurbished drives (mostly in the USA) but at about $2000 not the route I want to take.
Anybody know how else I could drive the this (and another two similar ones I have) motor?
|Thread: New design of mains plug?|
Two points, The relationships of the individual wire lengths are not a 'requirement', they may be a recommendation.
When you say wrong length of lead then if too long it can be shortened, if its too short buy another longer one
|Thread: Taper reamer|
I doubt its made for any specific purpose, rather its a general purpose hand reamer mostly intended to enlarge existing holes in plastics and soft-ish and thin-ish metal.
I bought one to add to my collection because the small diameter was less than 1mm, most of the ones I have start at about 3mm but this one is ideal for opening holes in PCBs. The one in the picture does not look as small as 1mm but is otherwise identical. One thing to add is that mine is razor sharp and seems accurately ground right to the tip and will actually create new holes quite easily.
|Thread: New design of mains plug?|
I am not a designer of power supplies but have seen hundreds of different designs of SMPS in everything from phone chargers to large bench PSUs and dont recall seeing more than a couple withe primary and secondary windings on separate bobbins.
Some that 'bigclive.com' has investigated and dismantled have the primary and secondary windings on alternate layers so more or less interleaved. If manufactured properly the isolation between input and output will meet or exceed the regulations, problem may arise if some other protection fails (say it overheats and the thermal fuse fails shorted) the transformer insulation may break down and couple mains to the output.
There are others on here that have intimate knowledge of PSU design and would be able to explain better than I that the subject PSU of this thread is extremely likely to be a safety hazard.
Its not possible to visually check separation of the transformer.
If you bought that from a UK supplier then trading standards should be advised. It certainly does not look to comply with current electrical standards.
The plug is the most obvious breach of CE regulations and should be changed. My concern though is whether what is inside the enclosure is safe to use (I'm being serious). We have no idea what you intend to use it for but potentially under fault or failure conditions there is always the possibility that mains voltage could be present on the output connector.
Our local surgery (one of three in the practice) was under threat of closure because it got a poor rating from the CQC and it needed investment. The partners have now 'temporarily' closed it saying that it was becoming increasingly difficult to deliver all their services. Their original closure proposal claimed that two instead of three locations would be better for all patients. It was near impossible to get a doctors appointment before the current situation arose, so here too it looks like 111 or 999 is all we have.
|Thread: vfd question|
The quality of the work is down to the quality of the machine operator but all things being equal a 3 phase motor with VFD will makes it easier.
Complication is irrelevant, looking inside a mechanical watch or clock one could say it was a complicate device compared with a digital version (tiny bit of silicon and a few other bits.
|Thread: QCTP dilema?|
Is there an easy explanation of what the different type of QCTP are defined as. Dickson and Multifix make sense to me (I can picture them in my mind) but with 'wedge' and 'piston' its not obvious where either of these two technologies are appliued in the QCTP
Is the piston the cylindrical pillar that the individual toolholders clamp or is the part that pulls the toolhoder against the Vee's of a Dickson. Wedge too is a loose term, does it refer to the 'cam' action of a Dickson?
|Thread: Tool info|
It could be a squeezer
|Thread: Nice Myford on ebay|
I dont know what was supplied as standard when the lathe was new but surely it would come with faceplate, Morse centres, some basic tools, oil gun etc. Granted this one has a proper toolpost and VFD but I would not call it well equipped.
As an aside, the mounting position of the VFD is a bit weird but I suppose its to avoid the cost of separating the controls into a 'pendant' type setup.
As a schoolboy in the 50's I read, re-read, and read again the Sparey book from the local library which I continuously renewed again and again. I knew every diagram and machining operation without ever seeing a Myford in the flesh. I hankered after one for a long time but about 25 years ago when I was actually able to buy a lathe I ended up with a Boxford.
Nowadays I have a Harrison but if I wanted something Myford size it would not be a Myford and definitely not the one in the link. It might be very presentable but its extremely poorly equipped (unless I've missed something) and adding chucks, steadies etc will bump up the cost.
I agree with Nigel, the desirability and the pricing of old motorbikes and Myford lathes etc is partly to do with retirees trying to regain their youth or whatever. The same sort of thing applies to old vehicles but the difference is that the appeal of the classic car can only increase as they become rarer (as they are part of motoring history) whereas old lathes will only eventually become museum items.
|Thread: What am i doing wrong|
My introduction to lathe tools with carbide inserts was about 15 years ago when I bought a toolholder with 10 tips at a local steam rally, I was instantly converted!
I then bought a set of five tools with inserts from a well know supplier. The tip were pure rubbish, if the purchase had been my first introduction to indexable tooling then without doubt I would have been put off for life.
Point of me mentioning this is that the tip in Steve's picture looks to be identical to the ones supplied in the set I mentioned, they have the same dull grey look and the same parallel 'gutter' around the perimeter.
PS, I did not know much about tips when I made my steam rally purchase but I now know they were the fine grained polished type for machining aluminium and plastic. (which I now use for 90% of all my turning)
|Thread: Best Cutter for HDPE.|
By coincidence I was sent a link today for some cutters that look to be ideal for your purpose.
You should be able to Google this
'ALU XP Europa Tool'
|Thread: AT1 inverter 3 wire control|
I dont know the VFD you have (a link to the manual would save people having to do their own research)
A 'standard 3 wire control' unit (two switches presumably) is only standard in respect of a non VFD motor control setup. Your VFD might need two N.O. switches.
Possibly your VFD might cater for one switch being N.C. but if not it may be that your switches have open and closed contacts so could be rewired (still should only need three wires).
You will probably need another three wires for the speed potentiometer too.
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