Member postings for Emgee

Phil

For the con rods my choice of Aluminum would be from 2014, 7075 or 6061 in that order, others may have more info on suppliers and/or grade.

Emgee

Richard,

May switch a contactor in/out that is required for the speed change, perhaps someone has a schematic to confirm their use.

Emgee

Paul, sounds like you have 2 capacitors wired in parallel so the motor will only be cap start or cap run type. the 440v rating is correct so don't use 230v types.

Perhaps 1 has open circuited and the single 1 is not enough to kick things away.

Check also any load lifting device is working so the motor doesn't have to overcome a pressurised cylinder when starting.

Emgee

Not a good idea to connect the 2 motors on the same starter/OL output. The starter has an overload device which should not be set greater than the spindle motor plate FLC to provide overload protection. You can check the setting on your overload by reading the scale setting at the top right of the contactor, adjustment is by turning the green (or red) knob.

Althought the Suds pump will have quite a low current demand the additional load could be sufficient to cause the overload device to operate and thus stop the lathe spindle and pump. If the O/L is adjusted to allow for the additional current less protection is given to the spindle motor, this could lead to the motor windings being damaged in the event of an overload.

The suds pump will not be protected against it's plated FLC overload so the above would also apply.

Emgee

Brian

Just read your post again and see you want to insert a reversing function, sorry if I misled you in my earlier post as I didn't allow for the reversing function, the starter is not suitable to reverse your single phase motor but you can connect to a Dewhurst or similar FWD/OFF/REV switch between starter and motor, only use the switch when power is off to the motor or you may cause damage to the switch contacts.

Emgee

Brian

You should find a wiring schematic inside the cover, shows remote stop/start wiring details.

To ensure the overload works disconnect the motor feed from term A and connect on B, wire a link between term A and L2.

Best to use a separate starter for the suds pump so you have correct overload range device.

Emgee

Edited By Emgee on 28/10/2016 20:27:04

Edited By Emgee on 28/10/2016 20:44:20

ian j

Strip it out and bake the case inc windings in the oven for a few hours, megger test for satisfactory insulation resistance between windings and case.

Emgee

Kenneth

When machining materials such as cast iron which create a deal of dust it is a wise precaution to wear a mask so preventing inhalation.

Emgee

Geoff

Some information regarding the spindle nose would help widen the choice, is it threaded, does it have a backplate fitted for chuck mounting. ?

Emgee

Edited By Emgee on 25/10/2016 14:03:21

Michael, I believe the dimension was 0.001" and in answer to your question I am not claiming to hold that tolerance on a 8 hole bolt circle using my cnc mill, or manually with my rotary table.

Emgee

Otley, wouldn't it better to change over the motor start winding ends to reverse directon ?

Emgee

Jason beat me to it, the AK10 denotes grade for Aluminum and other non-ferrous metals and plastics.

Emgee

Edited By Emgee on 22/10/2016 19:16:46

If you can overcome the spindle speed issue much will depend on the rigidity of the machine and the size of holes you wish to drill. Metal working Radial arm drills are normally heavily built to withstand very considerable forces without distortion, I don't expect a woodworking radial arm drill to be so substantial.

Emgee

mrbuilder

The contacts IMO in a good condition Dewhurst are of adequate size when closed to carry the starting and running current of your 1HP motor, these devices are old design when contact size/surface area was far greater than modern devices have.

The 5.2A is full load current, you will be not always be running at full load. DOL starting current can be 3 or more times FLC for a brief period, depending on load, this is the cause of burnt contacts when used as a starting switch. Before using check all cable terminations on the switch are secure.

You are already using a NVR starter and state the Dewhurst is not used for starting/stopping but only when reverse running is called for so you are aware of the possibility of burning contacts if used as the starting/stopping device.

Check after extended periods of use the metal cover of the Dewhurst switch remains at ambient temperature.

Emgee

Colin

Seems you misunderstood the comments made re splitting 3 phase supplies to 3 different consumers.

All UK consumers will have their own meter whether it be single or 3 phase depends on the type of supply required but in every case will be a single dedicated meter.

Emgee

Dave, adjacent properties were normally connected on different phases to assist with a balanced load across phases.

Neil, does your supply have 3 lines coming in ? if you are in a rural location could be 2 lives and a neutral, same phase but 480volts between the 2 live conductors.

Emgee

Nick beat me to it !!

Edited By Emgee on 19/10/2016 11:49:33

Ian, not so unusual as the supply companies used to install 3 phase supplies to properties with off peak heating loads that could not be supplied by a single phase 60A supply, not so common these days with less people using such systems.

Emgee

Edited By Emgee on 19/10/2016 10:24:16

Mike, measure the distance from the bottom of the toolholder to a centre placed in the spindle or tailstock, that is the absolute maximum thickness as most insert type turning tooling has the top surface level with the top of the tool shank, boring tools normally at centre of tool height.

It's easy to pack up a tool to centre but if the cutting tip is too high you would have to remove some material from the bottom of the tool to achieve centre cutting height.

Emgee

Brian

Carbide inserts are manufactured in several different grades, each with it's own dedicated properties and therefor more suited to cut some materials than others. Most will cut all materials with varying results and also some are better for finishing than roughing but nearly all are available in the various shapes used including your C 80 deg toolholder. Check online tool manufacturer's catalogues for more detailed information on Insert Grades.

Emgee