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Member postings for David Davies 8

Here is a list of all the postings David Davies 8 has made in our forums. Click on a thread name to jump to the thread.

Thread: VFD/Lathe fault
08/07/2020 10:50:01

"Now when I power up the VFD I get a reading of 0.00 but there seems to be no communication between VFD and the remote control panel, fwd/rev switches, the on/off switches and the speed control pot are all doing nothing."

Ron

Check the following parameters on the VFD or compare with any written setup data that you were given with the machine.

F01 Frequency command =1 , this enables voltage input to terminal 12.

F02 Run/Stop/Direction. =1, this enables external Fwd/Rev

F03 Max Frequency = 50.0, this is a basic setting , you may wish to increase but then you are into field weakening

F04 Base frequency = 50.0, (this should be set as the figure given on the motor rating plate)

F16 Minimum frequency = 10.0, not too low, when running slowly the fan is non-effective

taken from Cub handbook pages 5-3 and 5-4.

HTH

Dave, yes, another one.

Edited By David Davies 8 on 08/07/2020 10:50:42

Thread: Message from the prime minister
07/07/2020 16:11:27

Well, it made me laugh Duncan!

Thread: ML7 refurbishment
06/07/2020 22:35:43

Fastdave

Tracy tools list a tap the same thread as the Myford spindle nose and taps can also be found to fit the Boxford spindle which is 1 1/2 x 8 IIRC.

Dave

Thread: What to look out for on shank size when buying
06/07/2020 18:01:04

+1 for Cncpoorboy quality and prompt delivery too!

l have no connection either

Dave

Thread: Elliott M10 Tapered Ram and slideways
02/07/2020 21:12:11

Steve

I don,t know if you have seen Matt Look's videos on YouTube, he renovated a very poorly Elliot 14S a few years ago. He describes scraping in several videos. His channel is "lookcreations"

HTH

Dave

Thread: Grade of soft solder required to achieve a nice rounded fillet
22/06/2020 22:38:57

If it is marked Pb93.5 it is certainly not lead free, in fact it is getting towards pure lead. It should be good for wiped joints.

Thread: ELLIOT 10m
22/06/2020 22:34:17

Noel

Eight pole would give a typical speed of 725 rpm @ 50Hz, similarly six pole would give 960 rpm. 4 pole gives 1450 or so. Neither of the speeds given above are typical for an induction motor running at U.K. Mains frequency. Can you have a closer look at the rating plate?

cheers

Dave

Thread: Myford ml7 cross slide strip 6 holes
22/06/2020 22:21:28

+1 for the George Thomas mod and his books are well worth reading.

Thread: Grade of soft solder required to achieve a nice rounded fillet
22/06/2020 22:10:20

For cable jointing the solder could be as much as 80% Lead. This solder goes through a 'pasty' stage between solid and liquid, allowing it to be wiped with a 'moleskin' lubricated with tallow. To see a cable jointer at work on 11kV cables was a treat compared with the usual 415V humdrum.

Thread: Which tool and cutter grinder
22/06/2020 19:57:45

Hi Darren

I have an Alexander single lip cutter grinder which I use to sharpen drills using the 4 facet method. This machine is a Deckel clone and uses the "Deckel" type collets. I have been able to get collets from ebay sellers, the maximum available seems to be 5/8". The od of the collet shank is 20 mm so the wall thickness is about 2mm for that size. These collets are sometimes referred to as "U2" collets. Finally these collets have a buttress thread for the closing nut. A bit of an overkill perhaps as vee thread would surely suffice?

HTH

Dave

Thread: Jacobs morse taper chuck.
19/06/2020 13:24:38

" I did manage to get one off with the open end of a combination wrench hammered in to the groove"

Martin,

I'm pleased to read that there are still a few of us craftsmen around!wink

Regards

Dave

Thread: Drilling HSS
14/06/2020 07:14:19

PGK

Thanks for the alternative method. It did occur to me that spark erosion could also be used. If my memory serves me correctly machines to do this have been described in ME & MEW in the past.

Cheers

Dave

14/06/2020 07:09:37

Jason

the blade is ''all hard'' not 'bi-metal' so I don't have that option.

Cheers

Dave

14/06/2020 07:06:33

Hi Bill

Thanks for the details of how you go about the job!

Cheers

Dave

13/06/2020 23:19:27

I have some blades which are too long for my power hacksaw. It crossed my mind that a carbide drill could produce a new mounting hole at the correct centres. Has anyone tried this and what was the result?

thanks

Dave

Thread: R8 or morse taper 3?
12/06/2020 13:47:38

Hi All

As a user of a small mill with an MT2 spindle I can't comment on R8 versus MT3 debate but I am curious that no-one has mentioned Int. 30 taper. Are any machines available with this type of Spindle? Int 40 is common enough but is in a different league, as Andrew has said above.

Dave

Thread: Help, please
07/06/2020 20:27:37

No real help but the topic reminded me that I saw Austin Hayden driving his Lorna Doone at the IMLEC at Bittern park, Southampton in 1970. It was a very well finished loco.

Dave

Thread: Boiler water level gauge background
31/05/2020 20:18:25

Hi, you could make your own, a strip,mounted behind the gauge glass, painted white with diagonal black lines thereon is used on full sized locos. The water defracts the image of the diagonal line and so helps the viewer to see the level.

hth

Dave

Thread: Making new gib strip for cross slide
21/05/2020 22:55:55

Thanks for the link Pete, all is clear now.

21/05/2020 22:03:59

Pete

I hadn't considered using the top slide for Infeed but in that circumstance the gib should be nearest the tailstock as you have stated. In that case the Myford would have its gib nearest the chuck.

I wasn't aware that the Boxford had a facility for a cross slide stop. Can you expand on this as I can see it would be useful for screwcutting instead of checking the dial before starting the next pass?

cheers

Dave

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