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Member postings for Chris Mate

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

Thread: Insize Coacial Indicator used in Vertex Boring head
29/08/2023 18:04:35

Just for fun: I mounted the Insize Coacial Indicator not in a 10mm collet directly in spindle as usual, but mounted the Boring Head 1st, then the Coacial indicator in the boring head itself intended to be as one MT4 swop in spidle rather than two operations.

1-Mount MT4 Boring head in spindle.
2-Make 2mm sleeve and mount 10mm Coacial INdicator in 12mm bore Vertex Boring Head.
3-I never switch on or run the mill motor, just use my hands to turn.
4-I now adjust the boring head outwards for this case to make the indicator read and tention in the larger hole clamped in vice(Just for inllustration.
5-I now chose X & Y axis and turmn table till both are zeroed, it was quick and easy to my surprise, locked table recheck.
6-The spindle is not positioned over the centre of the hole.

7-Now normally the Coaxcial Indicator mounted in the spoindle move only Up & Down as it convert the out of centerness to usefull display on indicator.

8-Now in this case the Coaxcial Indicater is off centre itself, and apart from the legit Up & Down movements as expected, it also moves hoizontall as one would not have expected, but this movement does not effect its function.

I found this interesting regarding the operation of the Coaxial Indicator design and as it is uneffected by other movements other than those surfaces the design relies on.

See both pictures:

centeringwithboringhead-1call4920_paint.jpg

centeringwithboringhead-2call4921-paint.jpg

Thread: Mitutoyo Dial INdicator question
29/08/2023 02:33:10

Insize:
I bought a new Inzize Coaxial Centering Tool and received it today. It passed the 1st test where you hold it in your hand and turn it, the needle must have zero movement and it passed that 100%. I was impressed with the tool so far by the looks and feel of it. The price can be considered reasonable. The packaged green holder was one of the best I had seen so far. Light greenish screen. In perspective it was a bit cheaper than a 2nd hand Accusize one advertised on Facebook as new. I have a PDF about Insize and they seem to have every Measuring tool on the planet or most of it, so not sure if they might have upped their game lately, 1st time experience with them.

The Mitotoyo indicator was an older one I got 2nd hand few years back.

28/08/2023 15:50:03

Thanks for the info.

Thread: When boredom overtakes, make something, anything!
28/08/2023 05:30:29
Posted by Tony sacc on 20/08/2023 13:01:04:

I think that people who have to be taught everything are lacking imagination and the ability to think for themselves. . If you have to be taught how to do everything, you're just repeating other's mistakes,you'll never learn and you'll never be better than those you learnt from. So, think for yourself, dare to be better yourself. I've spent a lifetime fixing tradesmen's stuff ups.

Same goes for those who work from plans,you're just copying someone else's work, think for yourself, design something yourself, don't cheat!.

I'm sure you'll all hate this, sorry no apologies!

Realising at a very young age the value of "perspective" around anything in life, may be a trigger to start teaching yourself as you grow up.........
I think this is important observation, one should be able to think and improve, teach yourself but not always possible due to time or ability, or gather information from various angles to get perspective about anything, then figure out the best way forward for you, and if you reached the stage where you can spot faults in product manuals you probably ok enough. Only change if your improvement is better.
Otherwise you just a follower and if an artist your art may look like others you were taught by.

Thread: Mitutoyo Dial INdicator question
28/08/2023 05:14:21

I bought an older Mitutoyo Dial Indicator with broken glass few years back, used it, but recently had it repaired and fixed, guy said everything is ok no parts needed, accurate, only cleaned and replaced glass.

In the mean time I aquired a 2nd hand Insize similar dial indicator excellent condition. I played with it, and immediately noticed a difference. If I press the insize to its maximum, it reach a dead stop at a precise mark on the screen every time, while the Mitutoyo reach the end and has a spongy feeling with no precise dead stop feeling.

Is this correct for the Mitutoyo-?

Thread: Help! Excessive machine marks!
27/08/2023 18:41:33

It may sound too simple for most, but after watching some experienced machinists with chatter, I noticed the chips dancing around on toolhiolder, toolpost etc. So I would throw chips on toolholder, toolpost, crossslide etc, then cut as usual, and see if you can see the chips dancing from the originating source like the crosslide base or higher up, and investigate those parts. Just a suggestion if nothing else works.

Edited By Chris Mate on 27/08/2023 18:42:02

Thread: Boring - best practice?
21/08/2023 14:02:44

After I received a new boring head and boring bar with inserts, and sort of solved my problems initially by comparing it to better bars etc, I shortened the bar and it seems ok., I was however offered assistance should I need further assistance by a different company that sell Walter tools in the form of they will find me inserts for that bar that wil cur freely and correctly. They know what I got, so I assume if everything is ok, your last resort will be insert types for that bar etc which in my case these people has the science behind it, and stuff I bought from them before were all excellent, however their top boring heads and bars are too expensive for me, but they still saw a good selution not overly expensive.

Thread: Diacator made by Dietest
20/08/2023 19:17:37

Hi Michael,

 

A)The Lazer device is called "CentreQuick" centering .....

B)About your question regarding the ordinary coaxel centering devices operation.

-Normally they fitted to spindle/collet and spin internally as the spindle runs, mill motor running.
In this case you use it automatic way, it turns many revolotions around the spindles arc which you then compare to the hole you want to align the X/Y axis.

-My suggestion is if you fit this same tool to the Boring head itself, the mill motor stay switch off, you use it manually, meaning you turn spindle with hand and you confirm within one revolution for each revolution as now it follows whatever acr the boring head delivers to it as spindle is slowly turned by hand. The tool will move but not turn within an arc as it would if you switch the mill motor on, there is a difference. Maybe I am a bit stupid thinking here, but I will keep on thinking more about it. I can see the difference, you don't want an arc running within an arc so to speak. I am not an engineer, just wild thoughts for now, it may or may not be practical.

Edited By Chris Mate on 20/08/2023 19:18:40

20/08/2023 16:34:39

I am looking at the different types to get a better picture of all.

The other day I made a test cut with new boring head, I actually used the boring head/bar-Insert itself to centre the head above at 1st,... and then in the hole by listining to the boring bar tip as it go around, mill switched off, turn and adjust by hand, you don't want to break a bar or the head turning it on. It worked out after some effort.

These tools may not work out always:
I then realised there might be a situation, and thats a situation I might have to deal with if my current quick plan proves not to work out for restoring the RF 115 Rong Fu bandsaw which was dropping blades when I received it, a situation where indicating with a tool like this means not much if the bore has been weared out uneven.

So in a case like this, where you want a shaft to line up correctly from your boring and sleeving excersize, you must find a ring visible outside of the wear pattern(Hole) to indicate the original alignment and to the centre of your spindle. So in this case I will probably using the boring head and bar insert tip to get the job done right, time consuming but hopefully lined up correctly.

Note:It seems these tools has a very interesting point in design apart from what was mentioned above, and that is its accuracy of indication depends on two surfaces, maybe 3 in the design, otherwise its not effected.
That brings me to a point after some thought, one could use this tool straight in the boring head and let it swing from there, use that adjustment initially to set it up, then let it swing slowly and it will move but still faces you and get the job done uneffected, I never saw anybody uses it like this-?

Make a tool:
I can attemp to make such a tool shorter(More headroom) but then the indicator will sit sideways and not in path and upright, and it will not be accurate, but will only indicates movement of not being on centre, so you cannot off centre someting to an exact figure if you want to.

Wiggler:
I also thought of using the wiggler stiff tightened to indicate a circle, but not in the way a wiggler is normally used.

Lazer lights:

I also saw use of small lazer lights that just clip over spindle and shine a circle which you then position.
This seem interesting and easy.

What do you think-?.
 

Edited By Chris Mate on 20/08/2023 16:50:08

19/08/2023 19:26:55

Hi,

Does anybody here owns or used a Diacator made by Dietest for centering a hole below your mill spindle, similar function to the coaxial centering indicators-?

Thread: What did you do today? 2023
19/08/2023 05:53:21

Busy welding a bracket that will fit on top of silenced compressor, be able to swing up and away if needed more work space on top(Large Stainless tray mounted), a small 115 Rong Fu bandsaw I am restoring will fit on top to use occasionall and bolted to the bracket..

Thread: Safety
19/08/2023 05:39:49

After using a file on the lathe the 1st time it just felt unsafe to me, so I grind and glued another file handle on the other end(No sharp ends), so lathe file has two handles. I use it "Left Handed" not over chuck, it feels more safe to me this way.

I also added a cut out switch for the Lathe Key, toolpost spanner and a paddle with cutout switch. These has to be in right holders or lathe will not start or keep running, or switch off when running if they are removed. I quicly got used to it this way.
I also has a pipe(removeable) in front of lathe, it was added so I dont bump anything into handles going poast when not used, but soon realise it prevents me from stepping into the lathe, so the result was I never removed it when using the lathe, its my stomach's height so I slightly stand against it. A macinist of long time visted me, and said he liked it.

 

Edited By Chris Mate on 19/08/2023 05:48:48

Thread: Cheap digital callipers - observations.
13/08/2023 15:30:56

Just want to add something now that I thought about it. My 1st no name digital calipers, I mounted to the mill to measure quil up/down movements. Now here I found it to be very nicely repeatable. THe difference here is that it just slide up and down connected to quil and mill head, there are no forces on it as if when you measure the outside or inside diameters of something, so maybe how it behaves when you clamp it for a reading is where the cheap ones fails the most noticeable.
With this one if I reposition the quil to zero mark as example the cutter hardly skims anything, so it seems to work ok using it this way. How its mounted the backlash does not matter.

Thread: Recommendations sought for a non-shrinking, non-spill oil pot.
13/08/2023 07:23:58

From a gift shop:
I have tried a couple of pots/ideas but was dissappointed, but spot some glass pots with narrow openings shaped like a round trianglerelative thick glass(Some weight for the size), a small round artbrush will fit through the openning, different sizes. I bought a few from a gift shop(Small/Larger), and so far the bigger one about 10cm tall and the base will fit over your hand, is the one used. None has broken or posed a problem so far. I fit/slide a brake cyclinder rubber over the brush to prevent evaporation.

They handle easy by hand and don't tip over easily.
The weight is enough so inserting pulling out the brush does not disturbe the pot., I glued a rouns 3mm cutout metal to the bottom that will stick to a round welding magnet, if you want to have it stay put. Some chips gather at the bottom but dont bother, clean/rinse it out from time to time.

I used it for two years now and don't think about going back to anything else.

Edited By Chris Mate on 13/08/2023 07:29:25

Thread: Cheap digital callipers - observations.
13/08/2023 05:41:00

Some time ago I went to a local agri shop to buy a caliper. The Geodore one repeated to zero out of the box, while the other two of same manufacturer did not repeat even if I wipe them with fingers, I showed to store owner and biought the Geodore one at double the price which was still not the price of a good quality one like Mitutyo. Its still ok but sometimes in use I have to wipe it.

Thread: Improve 3-jaw chuck repeatability
08/08/2023 23:13:47

Something I found about the chuck that will throw me around is if its not clean from chips in the scroll.

Thread: Good work with a worn out lathe.
08/08/2023 23:04:56

Do you think spring passes has great value/potential-? Know your tol flex in uses...
I put my smallest boring bar(6mm Iscar) just like that in my new 50mm Vertex boring head and try to cut a brass piece around 22mm. The little bar surprised me, no funny noises. So I moved the advance up 0.1mm(10x indexes) meaning its suppose to cut 0.2mm(Both sides).
So I took inside measurements as best as I could....I found that it cut short of .2mm, but that I can make 7 spring passes to get it to cut nothing more. So in this case one can sneak up to a size using spring cuts rather than speculated adjustments and overshoot. So I think using spring passes might be of assistance.

Something I thought of before, is that in the case of a lathe turning a heavy chuck at some speed,how much influence can a sharp single point cutter/insert has on the running chuck with the centrificle forces present in the chuck taking a reasonable cut, compared to a mill with much less mass moving around but in this case the cutter moves and object stand stil(Clamped)l.

Edited By Chris Mate on 08/08/2023 23:07:33

Thread: Improve 3-jaw chuck repeatability
08/08/2023 17:31:06

Even theoretically a grinder is questionable as the stone wears off in one/every sweep, and in the end one is faced with temperature and your own accuracy of any measurements..

07/08/2023 19:42:18

I have made my 3-Jaw chuck adjustable, after I determined it has various levels of not accurate(Yes their is the grinding effort of the jaws as well) as you wind and clamp it on various dimentions. I saw an interesting suggestion by well know precision masjinist and that is to use the chuck key in just one slot to clamp it down, dont use the other two slots was his suggestion.

The other thing is 3 or 4 jaw chuck if you clamp a round bar with some lenght you can tap it in place on the far end, that say something about the clampling.

I think if you need accuracy, you also need the ability to readjust it accurate if its not, when re_inserted, a problem of time if you have loads of the same thing to make in a not so accurate machine. So how do one readjust a collet unless its mounted in an adjustable holder-?

Edited By Chris Mate on 07/08/2023 19:47:05

Thread: Just how good is AI?
07/08/2023 19:33:11

You need to start thinking differently about AI as projected as some form of intelligence.
1-Theres still a human mind(s) behind it. (Accountability-?)
2-Its memory & computing $ data based.
3-Its not the same type of "intelligence" the human brain can come up with, simply because its not as fexable in hardware, it does not have flesh, muscles, blood, chemicals & electricity all mixed up and fluent.
4-The "Inteligence" is an abstract projection by a human mind(s) to other human minds which can bbe exploited etc...
5-If implemented everywhere by good & evil forces, its going to be very difficult to prove faults later on, and communicate about it, I think people will start to panic when their banking affairs/finances start to misbehave.
6-I am not sure if the human race will have a history to look at in 50 years time, or be able to call it up the way it was stored modified etc..

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