ERL1340 Thread Cutting with a Proximity Stop System

mksj said:
As far as the LED light strips for under the splash shield lip, they make a huge improvement in lighting the whole lathe bed and eliminating the shadows from overhead lights. Any 40-48" light bar will work, the ones I use are either 12 or 24VDC, and I prefer a 3000-4000K color spectrum which is not too yellow or too blue. The one I use on my ERL-1340 is a display counter type, at 42W it puts out a lot of light, but it is angled down so does not shine in your face. It is probably too long and wide for smaller lathes.
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Brand New 48" LED LIGHT BAR 3500k w/12 Inch cord And mount Brackets HIGH POWER | eBay

HIGHEST QUALITY. This is for the light bar only.
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This is what I used on my PM-1340GT and 1440GT for other individuals.
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NEW 3'3" Long LED Light Bar Ceiling/Under Cabinet Fixture 24V 12W Soft White | eBay

NEW Long Non-Waterproof 24v 12w Warm White LED Light Bar. Outdoor Lighting: bridge, building exterior lines outline, building glass curtain wall washer, projection and other signs. Use LED light source, less power consumption, less heat light.
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Mark,
Got my LED and plan to install tomorrow. Any advise on how to angle the lights down as you did to prevent the light from shining up into my eyes?
 
Mount it under the edge of the lip, I mounted the 2 C clips with aluminum wedges so it shines about 30 degrees forward from down. So canted just enough so it lights the bed but does not shine in your eyes.
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Very cool. How come I do not see the ERL-1340 in PM's website?
 
I spent some time today in the garage puzzling over how to implement the normally-closed proximity sensor. It's effectively a high-side switch, pulling high when off and going open when metal is detected. I want to also be able to use a foot brake and traditional "off" switch as well, so a transistor will flip its "polarity" so that all three work as expected.
 
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llamatrails said:
Thanks for posting this.

I'd like to have YouTube save the video to my Watch Later or one of my playlists for future reference, but it says:
"This action is turned off for content made for kids."

Bummer, can you disable the kid safe locks ? Not like you made it X-rated or something ...

TIA,
Rick
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He was only wearing gloves didn’t you see?:rolleyes:
 
There are a number of machines and products not on the PM site, a bit unfortunate because people would probably buy more to outfit their machines. The ERL-1340 was a specific order, most people would go straight to the 1440TL which isn't much more. Both are sourced from the same manufacturer in Taiwan. If I had gone with the 1440TL I would have had to replace all my holders and chuck back plates, more than I wanted to do, and also moving the 1440TL is more challenging as it is almost 1000 lbs heavier (3400 lbs). If buying up from a smaller lathe and not having all the tooling, I would have gone with the 1440TL. Been very happy with the ERL, very quiet and solid. The VFD control system was integrated into the existing control box which was quite a challenge.

On the proximity sensors you can get them in either a NPN or PNP configuration, the sensors I use have both a NC and NO switch, have a voltage range of 10-30VDC@200 mA although some can go a bit higher to 500 mA. They are long range 3X shielded. It is not a simple matter of just adding one, as the control system needs to be designed around the sensor and the particular VFD used. When adding a mechanical foot brake there are additional considerations that one also need to signal the VFD to go into a free run or base block mode, and also a mechanism that the lathe will not restart when the brake is released. The E-Stop also needs to cause a rapid stop and also lockout all the other controls.

I normally do not wear thin rubber gloves but I had hand surgery with stitches and they do not mix well with oil and swarf. They are at least thin enough if that they get caught on something they will tear off. Always wear eye protection and never any clothing that could get caught in the machines.

As far as the video, you should be able to download it, I disabled the kid safe and I guess little kiddies cannot see it anymore. Something new along with their ads, no free lunch on anything. So it goes.
 
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I don't think this will work on my 1947 SB9C..........
 
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Kind of off topic, but the YouTube thing is because you told YouTube that the content is targeted at kids. Note that this is different from “kid safe”. Unless you are actually making content that is specifically focused on children, you don’t want to tick that box. YouTube applies a bunch of rules to anyone making content targeting children for several good reasons, none of which are going to apply to your work.
 
After thinking it over, I have an approach to use MKSJ's recommended sensor, which pulls up but not down. The best programmable configuration for my particular VFD allows using a normally-closed momentary STOP switch. When pressed, it disconnects the VFD's STOP input, allowing it to drop to zero volts, which stops the motor. Because it's normally closed, as many STOP switches as desired can be placed in series, but incorporating a proximity sensor seemed to complicate matters. My concern was that if it failed, the lathe might never turn if the stop input is stuck at ground. The solution is to have a switch to either run the STOP switches directly to +24V, or to the output of the sensor. The switch would be labeled something like "Enable sensor." It's a nice touch that the sensor has an internal LED that lets you know when it's detected something, though it should for its $150 price!
 
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