Drummond M First Time Use Troubles!

[Anonymous]

Posted by Martin Newbold on 30/06/2016 19:36:09:

Please don’t go this route on a Myford or Drummond you will be let down unless you go for 1.5hp like I was.

Wasn't the standard motor on the original ML7 1/3hp? Obviously those Myford boys didn't know what they were doing.

Andrew

[Martin NewboldParticipant @martinnewbold]

Posted by Andrew Johnston on 30/06/2016 21:24:54:

Posted by Martin Newbold on 30/06/2016 19:36:09:

Please don’t go this route on a Myford or Drummond you will be let down unless you go for 1.5hp like I was.

Wasn't the standard motor on the original ML7 1/3hp? Obviously those Myford boys didn't know what they were doing.

Andrew

Hi Andrew , well just giving you the benefit of my recent experiance as would not want anything else but this . Please choose what you want , just dont choose until you have seen . There was a reason for these bigger motors not just the fact they could not make them small

cheers Martin

[James Jenkins 1Participant @jamesjenkins1]

Hi all,

Thanks so much for all your replies – all very helpful.

I went back to it this morning and touched the tool up a bit, narrowing it and increasing the relief. I also cut a bit of a relief into the work, as I think it was rubbing. This made a big difference and in 5 / 10 minute I had done the same as had taken me 1 1/2hrs. The shoulders of the tool prevented me from parting off entirely, but a little attention with a hack saw (not on the lathe of course!) sorted it out. I then changed to a 1/2" myford tool, which allowed me to clean up and begin shaping. Much better progress. I have also ordered a 1/16th HSS parting tool.

As some of you may remember, we are restoring treadle powered weaving looms, brought down from the Isle of Lewis/Harris. So hence my fascination with the treadle lathe. The immense fly wheel, once moving, does the majority of the work and you can happily change foot whilst the lathe carries on cutting. In truth it wasn't the working leg that started aching, it's the one you end up standing on that does. Still. I worked on it for a couple of hours and was quite happy. It's a good workout!

No gas lamps here – I've just spent two weeks installing a 36v solar power system (**LINK**). Our yarn winding machines, although traditionally treadle or crank handle powered, are now run by standard 1/4hp 1425rpm motors, we are replacing them with 250w 36v motors, which will run off the solar system. Indeed this project is the aluminium pulley needed for this motor.

James

[Martin NewboldParticipant @martinnewbold]

Hi James try get some PVRs if you can they produce an amazing amount of juice yvw

[James Jenkins 1Participant @jamesjenkins1]

PVRs?

[Martin NewboldParticipant @martinnewbold]

sorry i mean some modern amorphous receptors The new ones are fantastic and work in low light even rain. Some now even generate from rain drops **LINK**

[Ady1Participant @ady1]

I had a 1/4 or 1/3HP before upgrading to a decent 1/2HP and it made a big difference

One advantage of really weedy HP or treadle power is that it teaches you to grind and set things up properly because this part of the skillset makes such a difference to doing the job at hand

Once you have loads of HP available it can make you a bit lazy because those things don't make such a difference

[HopperParticipant @hopper]

Posted by James Jenkins 1 on 29/06/2016 21:58:54:…The parting off tool is 3/16th in width and I used paraffin as a cutting fluid.

 

To make life a lot easier for yourself in future, you might want to look at a 3/32" x 1/2" parting tool blade, preferably mounted upside down in a rear toolpost. 3/16" wide blade is something I would hesitate to use on a full-sized industrial lathe with 5hp motor, let alone a treadle powered Drummond.

I have found it helps the old Drummond tremendously to have the carriage locked down good and tight when parting off. There should (might) be a lock screw in the apron under the cross slide dial handle.

No trouble parting off 2" steel bar in my M-type with a 3/32 x 1/2" blade – with a 1/4hp motor. I have yet to stall the 1/4hp motor despite trying hard. Belts will slip first. Parting off is usually done without using backgear too.

 

 

Edited By Hopper on 01/07/2016 00:33:40

Edited By Hopper on 01/07/2016 00:35:17

[SillyOldDufferModerator @sillyoldduffer]

Just to tidy up the discussion about the power output of humans, this is what Wikepedia says as part of their horsepower entry:

"In 1993, R. D. Stevenson and R. J. Wassersug published an article calculating the upper limit to an animal's power output.^[15] The peak power over a few seconds has been measured to be as high as 14.9 hp.^[15] However, Stevenson and Wassersug observe that for sustained activity, a work rate of about 1 hp per horse is consistent with agricultural advice from both 19th and 20th century sources.^[15]

When considering human-powered equipment, a healthy human can produce about 1.2 hp briefly (see orders of magnitude) and sustain about 0.1 hp indefinitely; trained athletes can manage up to about 2.5 hp briefly^[16] and 0.3 hp for a period of several hours. The Jamaican sprinter Usain Bolt produced a maximum of 3.5 hp 0.89 seconds into his 9.58 second 100m dash world record in 2009.^[17]"

So my school-day experiment that showed 14 youths to be roughly equivalent to a horse wasn't too far out. 1hp/14 is 0.07, which is within spitting distance of the official 0.1 I'm not sure I could have kept going indefinitely at that rate though – I was a 7-stone weakling who often had sand kicked in his face.

To the workshop – I need to find a spring.

Cheers,
Dave

[MWParticipant @mw27036]

Anyone remember that old song by Tennessee Ernie Ford, "Sixteen Tons" of number 9 coal? I reckon a docker, miner or farmer in his day could produce 250w consistently.

Michael W

Edited By Michael Walters on 01/07/2016 13:49:31

[James Jenkins 1Participant @jamesjenkins1]

Hi all,

Thanks so much for your help – I have today finished the pulley, and whilst I wouldn't hold it up as any sort of excellence, it works. I made a little video of me using the lathe to share on Instagram, where we are trying to build up a bit of a following for our project. Again, you'll notice many, many glaring errors and poor work (it is my first go on it), but do have a look if you fancy it:

**LINK**

[Michael GilliganParticipant @michaelgilligan61133]

Well done, James, and good luck with the project.

… Very stylish little video, too.

MichaelG.

[Martin NewboldParticipant @martinnewbold]

nice work

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