Member postings for Emgee

Nice looking rolls, should do some good work.

Emgee

Very low volume compared with a Peterborough Brick Co.

Emgee

Hi BobH

Stepper + driver + Arduino (or other controller) should do what you want, if driving always in the same direction when putting dimensioned cuts on backlash won't be an issue.
To achieve more power from a small stepper use a geared drive to the feedscrew.

Ballscrews are very reasonably priced now, as long as you can obtain one with a small enough ballnut then it may be possible to do a conversion.

Emgee

Hi Mark, compare them with the size/power output of the originals, allow a little over that for the retrofit.
The sizes quoted seem to be more than adequate for the job but ensure you have working limits on all axis before use.

Emgee

Nigel

Any kind of pip after facing will push a small centre drill off centre and snap the pilot.

Emgee

Hi Adrian

For Metric threads tapping drill size deduct the pitch from the diameter, so for M6 x1 tapping drill is 5mm so perhaps the sizes you mention are for fine pitch threads.
I would not use less than 60% engagement especially in softer materials.

Emgee

Check this video at 5 mins in to see what Andrew describes re swarf coming out as one ribbon per flute.

Emgee

**LINK**

Ian, be aware that you need the designated thread size for each insert as the crest form varies from the small to larger sizes, best to just buy the sizes as needed and you soon build up a number of common sizes, same info goes for different TPI inserts.

Emgee

Looking at other inserts on the site I didn't see any part or full form tips, no doubt the insert you are using is a std 60 deg angle without crest forming, hence the sharp crests to the thread cut.

Emgee

Edited By Emgee on 19/05/2019 22:20:39

Tim, as Dave says the device advised will protect the controller but the motor current details are needed to perhaps provide sizing of fuse for each each motor to give protection from overloads.

Emgee

Finished off making a few small parts, as an idea of size the threaded stud is M5 and M8, threaded holes are M3.

The studs are 316 stainless, the linkages are HE15.

Emgee

Hi Robin

Try reducing the spindle speed considerably and feed rate accordingly.
Perhaps there is a hard skin on the cast plate that would upset things a bit.

Emgee

William

If you are able to lift the saddle from the bed you may need to fit some new gib plates, or just remove and refit the existing ones by turning over end to end to use the unworn surface.
This will normally improve the performance of the lathe and is best to stand the lathe on end to gain access to the M5 socket caps retaining the gibs.

Did you get the chuck key ? if not a Jacobs K3 will fit if you turn the spigot to fit the chuck, also you need to extend the length to give working clearance.

I guess you know the chuck jaws are reversible, the relation of chuck jaws is the numbered sheet on the lathe headstock.

Emgee

Edited By Emgee on 11/05/2019 11:38:13

Adam, the bore micrometer or vernier are set on a known size gauge ring before use to confirm the reading, the bore mic should be adjusted if needed and the external bezel on the vernier can be rotatad and locked to suit the dimension.

Emgee

Richard, on my Bantam the operating lever you refer to acts as Start/Stop, direction of rotation depends on if the lever is moved up or down.

Emgee

Chris, I find it difficult to understand why anyone would object to the use of a product designed for the intended purpose.

Emgee

Peter, would be much easier to source some 60w GLS lamps.

Emgee

Looks good but unusual for the operating handle to be positioned on the left, I don't recall seeing that before.

Emgee

Michael, lost the Arc ad from my screen several days ago, still wondering why.

Perhaps the Badger is blocking it, must check.

Emgee

Edited By Emgee on 05/05/2019 10:34:26

John, always easy to damage inserts by moving onto stationary work, with normal use they shouldn't fracture.

Emgee