Craigslist deals

No commercial posts, please. Individual divers only.
User avatar
Jeff Pack
I've Got Gills
Posts: 3086
Joined: Mon Sep 12, 2011 8:51 am

Re: Craigslist deals

Post by Jeff Pack »

Desert Diver wrote:
Jeff Pack wrote:Only downside, is when you slow'm down too much , heat builds up in the motor, and the VFD will shut it down.
Jeff, I never noticed this thread had continued till right now. The reason the VFD shuts down when you slow a motor too quickly is because when you reduce the frequency the motor is generating back onto the DC buss of the VFD and most VFD's have no way to put that power back to the incoming line. When the DC bus voltage goes too high the VFD shuts down to protect itself. Most VFD's have a place to hook up resistors so the waste power from slowing down the motor can be shunted to the resistor bank. I have this setup on my small lathe, and have put them on sawmill VFD's. I can set the deceleration time on my small lathe to 1/2 second and it stops like you hit it in the head. In one of the sawmill applications a log running at speed in the same direction as the chipping heads and saws cutting on it could be braked rapidly any time the heads or saws started to go overcurrent. I put overcurrent sensors to protect the resistor banks but have never tripped them and the motors seem to deal with it very well.

Brian
I'm not talking about stop, I'm talking about running them too slow. My stop is set super fast , and works great. Cranking motor speed down too far, and amp draw goes way up, and VFD gets unhappy.
=============================================

- I got a good squirt in my mouth
- I would imagine that there would be a large amount of involuntary gagging
- I don't know about you but I'm not into swallowing it

CCR discussion on Caustic Cocktails.
User avatar
Desert Diver
Extreme Diving Machine
Posts: 472
Joined: Tue May 22, 2012 9:20 pm

Re: Craigslist deals

Post by Desert Diver »

True story. If you have a load that decreases with speed you can get away with 10-15hz but VFD's are not really replacements for gearboxes. They work best set up to run things overspeed. I have run 1800 rpm gearmotors at 5400 rpm for a particular purpose and you get better motor cooling and lower amperage so long as load doesn't go too high with the additional speed. For really low speed running you can put external fans on the motor and adjust the volts/hertz curve to match the motor better.
User avatar
Jeff Pack
I've Got Gills
Posts: 3086
Joined: Mon Sep 12, 2011 8:51 am

Re: Craigslist deals

Post by Jeff Pack »

=============================================

- I got a good squirt in my mouth
- I would imagine that there would be a large amount of involuntary gagging
- I don't know about you but I'm not into swallowing it

CCR discussion on Caustic Cocktails.
fljamis
Getting To Know Folks
Posts: 5
Joined: Mon Oct 20, 2014 11:08 pm

Re: Craigslist deals

Post by fljamis »

fljamis
Getting To Know Folks
Posts: 5
Joined: Mon Oct 20, 2014 11:08 pm

Re: Craigslist deals

Post by fljamis »

User avatar
renoun
I've Got Gills
Posts: 1512
Joined: Sun Aug 31, 2008 3:43 pm

Re: Craigslist deals

Post by renoun »

"Just to be clear, doing the Diamond Knot requires at the minimum double IPAs to be DIR." - MattleyCrue
"Mmmm....... Oreos!
They didn't look too good when I was spitting in my mask for dive #2!" - cardiver
User avatar
Jeff Pack
I've Got Gills
Posts: 3086
Joined: Mon Sep 12, 2011 8:51 am

Re: Craigslist deals

Post by Jeff Pack »

=============================================

- I got a good squirt in my mouth
- I would imagine that there would be a large amount of involuntary gagging
- I don't know about you but I'm not into swallowing it

CCR discussion on Caustic Cocktails.
User avatar
ljjames
I've Got Gills
Posts: 2725
Joined: Mon Jan 22, 2007 9:46 pm

Re: Craigslist deals

Post by ljjames »

Saw this on CL, these are great lights, I have a set that I use all the time...

http://seattle.craigslist.org/skc/pho/4792540587.html
----
"I survived the Brittandrea Dorikulla, where's my T-shirt!"
KneeDeep
Submariner
Posts: 569
Joined: Tue Sep 06, 2011 8:25 pm

Re: Craigslist deals

Post by KneeDeep »

Any one looking for XXL OMS fins (I love mine)

http://seattle.craigslist.org/see/spo/4816748028.html
The ocean is a lousy teacher. First you get a test, then the lesson.
User avatar
geo
Frequent Bubbler
Posts: 43
Joined: Sun May 31, 2009 8:24 pm

Re: Craigslist deals

Post by geo »

User avatar
Gdog
NWDC Moderator
NWDC Moderator
Posts: 3984
Joined: Mon Mar 31, 2008 7:41 pm

Re: Craigslist deals

Post by Gdog »

User avatar
finnegankp
Dive-aholic
Posts: 293
Joined: Fri Sep 10, 2010 11:26 am

Re: Craigslist deals

Post by finnegankp »

http://seattle.craigslist.org/est/spo/4913953535.html

Oceanic Excursion BCD - Well Maintained w/warranty $350 obo
To dive? Or not to dive?... the latter is irrelevant! Get in the water!
User avatar
ryjoph89
Frequent Bubbler
Posts: 37
Joined: Wed Mar 30, 2011 2:25 pm

Re: Craigslist deals

Post by ryjoph89 »

http://seattle.craigslist.org/sno/spo/4931828566.html

Selling a bunch of extra/unused gear that's been sitting around for too long...
Manifold, argon straps, bands, SMB, lift bag, strobe, cave reel, camera, Dive Alert, plus misc extras
User avatar
SealScott
Frequent Bubbler
Posts: 48
Joined: Tue Feb 19, 2013 6:47 pm

Re: Craigslist deals

Post by SealScott »

http://seattle.craigslist.org/see/spo/4985787579.html

2 - Faber steel LP80's (+ rated, 2014 hyrdo)
2 - Faber steel LP 95

I messaged with the seller this morning - great guy and willing to answer questions.
User avatar
Norris
NWDC Moderator
NWDC Moderator
Posts: 4695
Joined: Wed Sep 03, 2008 2:31 pm

Craigslist deals LOT OF TECH GEAR

Post by Norris »

Looks like a pretty decent hit, and for 3500 it might be worth it


http://seattle.craigslist.org/tac/for/4973745166.html
**Pinch it, don't stick your finger through. You're just pinching a bigger hole.
CAPTNJACK - 2012**
User avatar
Norris
NWDC Moderator
NWDC Moderator
Posts: 4695
Joined: Wed Sep 03, 2008 2:31 pm

Re: Craigslist deals

Post by Norris »

mmmm Scuba diving gear and only 700.00

http://seattle.craigslist.org/tac/spo/5045257088.html
**Pinch it, don't stick your finger through. You're just pinching a bigger hole.
CAPTNJACK - 2012**
User avatar
Gdog
NWDC Moderator
NWDC Moderator
Posts: 3984
Joined: Mon Mar 31, 2008 7:41 pm

Re: Craigslist deals

Post by Gdog »

KneeDeep
Submariner
Posts: 569
Joined: Tue Sep 06, 2011 8:25 pm

Re: Craigslist deals

Post by KneeDeep »

Wow.. that's a great price for 119's
The ocean is a lousy teacher. First you get a test, then the lesson.
User avatar
Gdog
NWDC Moderator
NWDC Moderator
Posts: 3984
Joined: Mon Mar 31, 2008 7:41 pm

Re: Craigslist deals

Post by Gdog »

User avatar
mpenders
Submariner
Posts: 568
Joined: Tue Jun 30, 2009 10:59 am

Re: Craigslist deals

Post by mpenders »

Anyone need a Scooby?
Scooby.PNG
User avatar
bradmond
Submariner
Posts: 571
Joined: Fri May 31, 2013 1:50 am

Re: Craigslist deals

Post by bradmond »

just bought 2, thanks Mike
User avatar
60south
Pelagic
Posts: 985
Joined: Sun Aug 10, 2008 1:24 pm

Re: Craigslist deals

Post by 60south »

$20000 for a turn-key dive training operation (a trailer with all the goodies). Not sure if this is a good deal, just thought it was kind of amazing.

http://denver.craigslist.org/bfs/5232636926.html
User avatar
Gdog
NWDC Moderator
NWDC Moderator
Posts: 3984
Joined: Mon Mar 31, 2008 7:41 pm

Re: Craigslist deals

Post by Gdog »

Wow... That is actually quite impressive. In spite of the crappy oceanic tropical bcds. Well organized and thought out.
kundalinichi
Frequent Bubbler
Posts: 27
Joined: Thu Feb 23, 2012 10:07 pm

Re: Craigslist deals

Post by kundalinichi »

Post Reply