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Member postings for Les Jones 1

Here is a list of all the postings Les Jones 1 has made in our forums. Click on a thread name to jump to the thread.

<< First < Prev 98 99 100 101 102 103 104 105 106 107 108 Next > Last >>
Thread: Internal Threading
25/05/2011 17:23:41
Hi Paul,
What material are you trying to cut the thread in. Also did you have any problems with the rest of the machining using HSS.
Les.
Thread: 2 piece collet ?
24/05/2011 22:16:00
Hi James,
I think for this application it would be an advantage that the two halves did not meet. They would compress onto the pipe better. I think if you can find them on ebay it is not worth making them. I have just done search and found that Amazon sell the kit for £14.49
Les.
24/05/2011 21:48:11
Hi James,
I think I would be tempted to start with two pieces of rectangular bar clamped together in a 4 jaw chuck. That way it could be centred with a dial gauge mounted on the tool post. This would mean that the split would be exactly in the centre. After the threaded end and taper had been machined it would be cut off from the bar and the other end machined with it screwed into short length of bar that had been machined to to hold it. I would wait until you have had some more suggestions and pick the one you think is the best.
 
Les.
Thread: Sieg Super X3 advice needed!
24/05/2011 12:21:57
Hi Nic,
I have had an X3 (NOT SX3) for s few years and I am happy with its capabilities. If you are used to the rigidity of a Bridgeport then you will have to get used to taking lighter cuts.
Les.
Thread: Headstock Tachometer
22/05/2011 22:41:06
Hi Chris,
The Design that Steve Garnett refers to was submitted to MEW about February 2010. As so much time has elapsed I do not think it will be published. If you are interested the design is on my website.
 
Les.
Thread: trimming grinding wheel
22/05/2011 09:05:47
Hi Nobby,
I just clamped a single point diamond dresser to the table and traversed it from side to side. This set up was just a lazy way to make grinding rest. I had the cross vice from my first attempts at milling on a drill press. (Not very successful.) The end mill grinding jig is Harold Hall's design from issue 170 of MEW The use of a cheap bench grinder is also Harold Hall's idea from his book "Tool and cutter sharpening" I added a key way to his design to allow me to run the grinder in either direction without the wheel nut unscrewing.
Regards Les.
Thread: Why so few profiles?
21/05/2011 08:48:41
Hi All,
I think giving approximate location is the most useful thing. Too many times people ask for a supplier for something. Without even knowing which continent they are on then there is no point in making suggestions. Also when someone needs help with something then knowing their location would allow others to offer help if a visit to see the problem was the best way to solve it.
Les.
Thread: micrometer dails
18/05/2011 18:53:33
Hi Nobby,
I've just uploaded a photo to an existing album and it seemed to work OK. The only strange thing is that the album information claims that there are zero photos in the album when there are two. I will try to insert the photo into this post to see if that works.
It seems to work OK.
 
Les.
Thread: VFD Drives
17/05/2011 09:20:41
Hi Jon,
If the device you are using to measure the power only senses the current then it cannot give a true power reading. To measure TRUE power the device needs to know the phase relationship between voltage and current. I think the device you are using is just measuring volt amps and even that value is probably only correct if the supply voltage is at its nominal value. (Which is a reasonable assumption.)
 
Les.
Thread: Scale Radiator Hose
16/05/2011 18:00:43
Hi Jason,
I tried putting some of the irrigation tube in almost boiling water. It became very soft so I do not think it will serve your purpose.
 
Les.
15/05/2011 18:58:31
Hi Jason,
One possibility is the tubing used for drip irrigation systems. The wall thickness is about 0.6mm and the bore about 4mm (0.157") and it is black in colour. I do not know if it will be suitable for use around 100 Deg C. I will try putting some in boiling water tomorrow.
Les
Thread: Correcting pilot error
15/05/2011 09:26:52
Hi Dave,
The fact that you are marking out and centre popping makes me assume that you do not have a milling machine. If you did I would suggest using a slot drill. Assuming that you only have a drill press I suggest drilling a 1/4"hole in a piece of steel (Silver steel and harden it if possible.) and clamp this to the original piece of metal so that this will guide the drill to the correct position. More information would help other people to make suggestions. For example what equipment you have, the material you are drilling. the depth of the hole (And is it a blind hole.)
 
Les.
Thread: unable to add new postings
08/05/2011 11:37:50
Hi Paul,
I am confused. What does this have to do with the thread topic ?
Les.
Thread: Safety lamps for the lathe
07/05/2011 15:49:51
Hi Martin,
I think at that price it is not worth making your own lights.
I think I might buy a couple of them myself.
Les.
07/05/2011 14:43:39
Hi Merry Miller,
There is an article in issue 175 (April 2011) of MEW using 12 volt spotlights. I have made similar lights for my lathe and mill and they work well. I bought some die cast downlight fittings in one of the pound shops. I machined the front of the fittings so they fitted inside some aluminium tube I had. Doing it this way is cheaper than buying the holders as a separate item and you have a ready made circlip fixing for the bulbs.
Les
Thread: Removing needle roller bearings ?
04/05/2011 10:54:41
Hi Philip,
How about boring a rebate behind the bearing to a diameter of 15 - 18 mm and then using Dias Costa's suggestion.
Les.
Thread: Internal threading on Alu tube problem.
03/05/2011 22:39:09
Hi Martin,
I assume you want a straight boring head arbor so you can mount it in the chuck. I have not seen these advertised. If you take the chuck off your lathe there is normally a morse taper in the end of the spindle so you should be able to get a morse taper arbor to fit. (You may have to use a reducing sleeve.) By the way I think the use of spacers as shown in the second picture that Jason pointed to is better than boring the hole slightly under size as I suggested.
Les.
03/05/2011 20:33:49
Hi Jason,
Looks like I've just re invented the wheel.
Les.
03/05/2011 20:15:09
Hi Martin,
The way I'm going to suggest I have never heard of anyone trying before.
The basic idea is to mount the screw cutting tool in a boring head in the headstock and mount the tube on the cross slide. The hay I would mount the tube is to get two lumps of wood. The first lump with a height that makes the top surface sit at the centre height when mounted on the cross slide. First find a way to clamp it to the cross slide. If the cross slide has T slots then use four studs to fix it. The second block of wood should be about 60 mm thick. Before mounting the first block on the cross slide drill holes to allow four more studs to bolt the two blocks together. I suggest using the type of T nuts that press into the holes in the wood in the lower block. Now clamp the two blocks together on the cross slide. Tighten up the gib on the cross slide so it cannot move. Now drill a large hole in the blocks with a drill mounted in the headstock and open it up to just under 38 mm with the boring head. This hole will be concentric with the spindle. Slacken the studs holding the top block of wood to the bottom block and slide the tube into the hole and re tighten the studs. DO NOT SLACKEN THE STUDS HOLDING THE BOTTOM BLOCK TO THE CROSS SLIDE.
Now put the screw cutting tool in the boring head. You should now be able to cut the thread.
Les.
Thread: Cheap linear scale display
02/05/2011 09:14:07
Hi Derry,
If you can afford the glass scales i would recommend them over the Chinese scales. I have the original 2 * 24 bit Chinese scales on my mill and lathe. The Bin6 scales you can get now have two disadvantages over the original 2 * 24 bit type. One they auto power down after a time. Two the sample rate is only about seven sample per second compared with 50 times per second for the original type. (When in fast mode.)
My first attempt at a DRO on my mill was quadrature rotary encoders on the leadscrews with a PIC driving an LCD display. The code was based on the QCC100 as the source code is available for that. As you are attempting to disassemble the DRO350 code you should have no problem building a display for glass scales
Les.
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