Member postings for Paul White 3

Thanks to all respondents , your comments were most helpful .

i had not wished to high jack the thread but

the OP question is pertinent to where I find myself.

Michael Briggs post takes us full circle- does the £50 unit have the set up spec. to allow the

use of small motors.

If Clive ever gets a "manual" I Would be pleased to hear.

Hello all,

can anyone comment on the use of a VFD rated at 1.5 kW on smaller motors, of 1/2 HP RATING.

TIA.

paul.

Bob.

Thanks for your helpful comment, I will try to

get a copy of your article .

John,

Thank You for your helpful input . More to source and read.

Paul

Hello Bob,

Thanks for your prompt response

I have an excellent ELS but it is fitted to a lathe. My hope is to make a small simple as possible item to use on the T&C grinder. As previously mentioned I have tried mechanical systems but the prospect of a variable pitch in the region of 1-2 TPI on up to 3" is still to be found.

was your Arduino program from a library, and was it simple.

thanks

paul

Hi Bob,

I would like to ask how you measure the helix of the cutters for sharpening.

I have tried all manner of devices (mechanical ) but have failed miserably . The area I am trying to address is that of

sharpening the sides of small end mills when the usual mechanical guide does not work.

your use of an electronic solution looks to the answer but the helix variation has me stumped.

thanks

paul

+1, well said Joe.

Dave Halford.

Your proposed - push back and clamp is the process I use, but had not been told that I couldn't!

Gary,

I must disagree with your "only purpose for the block" statement . My reason for making one was to change from vertical to horizontal configuration without taking off the very heavy head. This is perhaps what the OP was thinking.

Hello Frank,

Having the same problem with regard to the weight of the vertical head, I made a lifting block from a piece of 3" sq.

18" long mild steel. Having machined the dove tails I also drilled some lightening holes in the support.

I also fitted a separate motor for the vertical head driven thro a VFD . This set up removes the need to reset the drive belt.

Joe,

I should have guessed, did not consider stroke variation, making an even more impressive build.

Looks like a busy year, 2 days into it and 2 projects finished

.Paul

Joe,

Did you really mean 2 and 130 strokes/sec. I know you build fast but HSS blades must be essential!

A very neat product at any speed.

Joe, Many thanks for the very interesting link.

Emgee, I had a screen appear that suggested itself to be a windows security alert, warning me of a virus attack(3of them) and listing them, with the information that my operating system was in melt down. Action was advised to immediately use a scan (free of charge) by downloading from the page.

Ran windows security scan and Malwarebytes both gave clear result. The initial screen was quite convincing, take care.

Paul..

Hello all,

If anybody intends to buy one of the die grinders on offer today, be sure to open and check the contents before leaving the shop, I travelled and returned home then found on opening the carton that one of the collets was missing.

Spares are not held so a return journey is needed for exchange putting another £5 ONTHE PRICE.

Joe,

A very interesting thread. The link you gave was also informative. I am not clear if the damper increased available torque or allowed the stepper to operate faster. This raises the question of what would be the result of such a unit on the normal AC motor?

Joseph Noci post earlier today.

This is a most interesting post, in my opinion, which for me, raises a number of questions Joe.

1.Was there any science behind the dia. of flywheel choice, the material used or any weight target?

2. Was the choice of slug material and radius of location following any calculation ?

3. would a smaller steel flywheel with lead slugs be as effective (or better) ?

paul.

Joe having put my activity on the board I must now comment- I had built a Jacobs machine some 20 years ago but found the changing of gears for each wanted gear a bit of a fag, just the same as setting up for screw cutting on the lathe. The lathe problem was solved by Joe giving me the detail and lots of encouragement for an ELS (electronic leadscrew).

This was such a success that I asked Joe for an opinion on removing all the gears from the hobber and doing the same electronically, almost by return he had produced a program and circuit.

It was then down to me to make a new gear blank head and set up an encoder on the hob spindle. This is still work in progress (work being impossible for the last 2 months, too hot). Without doubt if I were starting on a hobber today it would be a stripped down Jacobs with Joes electronics.

It is a fun project in my opinion.

paul.

Thank you all for your helpful input, subject to the original hope for a spec sheet I think we can put this one to bed.

Paul.

John, All the information that I have is covered in the first posting and the response to John Haine. the only additional info I can give is the wire gauge of the winding, this is 23SWG ( to the best of my measurement ).

How do I ensure its meant to run on 240 volt.

Thanks for your response.

Paul

Michael, another supercharged response, thanks. A quick look through the RS listing has specs that I find just produces more questions. Your last comment - load it and see if it gets hot, is a probable course of action.

I hoped in my ignorance that someone may have a spec.

Kwil, thanks for the warning. I am not new to the auto transformer I have a large unit that I have used over the years on all sorts of applications but it is a HEAVY unit , this one that is subject of the posting is much lighter .

Paul.

Edited By Paul White 3 on 20/06/2018 14:42:02

John, that's what I call a response, the winding is 4 inches dia and 1.5 inches deep.

Thanks

Paul