I’ll mention that if the motor is a dual-voltage one (120/240 VAC), there is usually still only one start winding and if the motor is wired up to run off of 240 VAC, the start winding is still running off of 120 VAC (it will be wired line to neutral).? So the start capacitor range will be the same as shown on the chart for 120 VAC, not 240 VAC.? Or in other words, the chart for typical values of start capacitors for 240 VAC motors applies only to motors that will only run on 240 VAC (or higher). ? Robert Downs ?
toggle quoted message
Show quoted text
From: [email protected] [mailto:[email protected]] On Behalf Of John Vreede
Sent: Wednesday, April 15, 2020 15:18
To: [email protected] Group Moderators
Subject: Re: [4x6bandsaw] Motor capacitor? The first chart image that came up when I googled 'electric motor capacitor chart' was from . It gives 320/400uF @ 150Vrms max capacitor voltage as size for 1/2HP (373W) motor on 110/125V mains supply.?? As a check on this I compared the size they give for 1/2HP on 200/250V mains to what my (now burnt-out) 1987 Taiwanese motor has in it and it agrees.? They said 80/110uF and my motor has 100uF - jv ?
|
No, we just get two hot wires, neutral and
ground.? To add to the electrician's entertainment we're also
putting 110V outlets in several rooms since we're taking USA tools
and some kitchen stuff with us.
Had to fight a bit to get our power allotment raised, the land is
zoned for small agriculture + small homes.? Then here we come with
an office and machine shop.?
Oh, and I forgot Daylight Saving time, we're actually 11 time
zones but with DST we appear to be only 10.? Leads to a lot of
late night WhatsApp messages.
In preparing I've been testing items on a 3kW 50Hz sinewave
inverter.? The band saw and mini-lathe work great!? I sold my mill
and two welders, will buy new there.?? The brushed things like
electric drills don't care, one actually sounds better on 50Hz.
On 4/15/20 2:58 PM, Ralph Hulslander
wrote:
Thanks, thought that might be the source.
Do you have?a phase choice?
Ralph
--
Jerry Durand, Durand Interstellar, Inc. +1 408-356-3886
&
|
Thanks, thought that might be the source. Do you have?a phase choice? Ralph
On Wed, Apr 15, 2020 at 5:50 PM Jerry Durand < jdurand@...> wrote:
Our new house is 10 time zones east of California
where they Hert 50 times a second and have WYE power.? :)
On 4/15/20 2:43 PM, Ralph Hulslander
wrote:
Jerry where do you live that you have 380V?
Ralph
Thank you for all the info.? I am away from the
shop today but tomorrow I will give it another look.
Dave
On Wed, Apr 15, 2020 at
1:24 PM Jerry Durand < jdurand@...>
wrote:
That reminded me, on
dual voltage (120/230) items they sometimes fuse
things for the higher voltage so when we plug into 120V
the fuse is half
the size it should be.? Had that happen on two 3D
printers.
Anyway, not the case with this motor, but a thought to
keep in mind when
something fairly new pops a fuse.
I'm currently sorting out the power for our new house,
what will be 220V
and what will be 380V.? I guess the 380V wires should be
wrapped with a
better grade of duct tape than normal.? :) :)
--
Jerry Durand, Durand Interstellar, Inc. +1 408-356-3886
&
--
Jerry Durand, Durand Interstellar, Inc. +1 408-356-3886
&
|
Our new house is 10 time zones east of California
where they Hert 50 times a second and have WYE power.? :)
On 4/15/20 2:43 PM, Ralph Hulslander
wrote:
Jerry where do you live that you have 380V?
Ralph
Thank you for all the info.? I am away from the
shop today but tomorrow I will give it another look.
Dave
On Wed, Apr 15, 2020 at
1:24 PM Jerry Durand < jdurand@...>
wrote:
That reminded me, on
dual voltage (120/230) items they sometimes fuse
things for the higher voltage so when we plug into 120V
the fuse is half
the size it should be.? Had that happen on two 3D
printers.
Anyway, not the case with this motor, but a thought to
keep in mind when
something fairly new pops a fuse.
I'm currently sorting out the power for our new house,
what will be 220V
and what will be 380V.? I guess the 380V wires should be
wrapped with a
better grade of duct tape than normal.? :) :)
--
Jerry Durand, Durand Interstellar, Inc. +1 408-356-3886
&
--
Jerry Durand, Durand Interstellar, Inc. +1 408-356-3886
&
|
Jerry where do you live that you have 380V?
Ralph
Thank you for all the info.? I am away from the shop today but tomorrow I will give it another look.
Dave
On Wed, Apr 15, 2020 at 1:24 PM Jerry Durand < jdurand@...> wrote: That reminded me, on dual voltage (120/230) items they sometimes fuse
things for the higher voltage so when we plug into 120V the fuse is half
the size it should be.? Had that happen on two 3D printers.
Anyway, not the case with this motor, but a thought to keep in mind when
something fairly new pops a fuse.
I'm currently sorting out the power for our new house, what will be 220V
and what will be 380V.? I guess the 380V wires should be wrapped with a
better grade of duct tape than normal.? :) :)
--
Jerry Durand, Durand Interstellar, Inc. +1 408-356-3886
&
|
Thank you for all the info.? I am away from the shop today but tomorrow I will give it another look.
Dave
On Wed, Apr 15, 2020 at 1:24 PM Jerry Durand < jdurand@...> wrote: That reminded me, on dual voltage (120/230) items they sometimes fuse
things for the higher voltage so when we plug into 120V the fuse is half
the size it should be.? Had that happen on two 3D printers.
Anyway, not the case with this motor, but a thought to keep in mind when
something fairly new pops a fuse.
I'm currently sorting out the power for our new house, what will be 220V
and what will be 380V.? I guess the 380V wires should be wrapped with a
better grade of duct tape than normal.? :) :)
--
Jerry Durand, Durand Interstellar, Inc. +1 408-356-3886
&
|
That reminded me, on dual voltage (120/230) items they sometimes fuse
things for the higher voltage so when we plug into 120V the fuse is half
the size it should be.? Had that happen on two 3D printers.
Anyway, not the case with this motor, but a thought to keep in mind when
something fairly new pops a fuse.
I'm currently sorting out the power for our new house, what will be 220V
and what will be 380V.? I guess the 380V wires should be wrapped with a
better grade of duct tape than normal.? :) :)
--
Jerry Durand, Durand Interstellar, Inc. +1 408-356-3886
www.DurandInterstellar.com & www.Durandinterstellar.ru
|
Hi Dave The first chart image that came up when I googled 'electric motor capacitor chart' was from . It gives 320/400uF @ 150Vrms max capacitor voltage as size for 1/2HP (373W) motor on 110/125V mains supply.?? As a check on this I compared the size they give for 1/2HP on 200/250V mains to what my (now burnt-out) 1987 Taiwanese motor has in it and it agrees.? They said 80/110uF and my motor has 100uF - jv
I have a 1980s Jet Taiwan built saw that I purchased used a while back.? It stalls starting and buzzes sometimes, classic capacitor symptoms.? After removing the cover it was clear that the capacitor had been replaced before.? I ordered another one with the same ratings and it was worse than what was in there to start with.? I suspect the one in there that was installed by a previous owner was not the correct capacitor.? Does anyone know what the specs are for the correct capacitor?
Thanks
Dave
|
Check that the terminals fit snugly on the capacitor, I have seen that problem before.
Leon Robinson ?? K5JLR
Political Correctness is a Political Disease.
Politicians and Diapers should be changed
often and for the same reasons.
On Wednesday, April 15, 2020, 1:48:45 PM CDT, John Schirra <cptcrunch51@...> wrote:
I second checking the centrifugal switch. Capacitors generally do not heal themselves.?
On Wed, Apr 15, 2020, 9:51 AM Alan Muller < alan@...> wrote:
Many Taiwan motors of this vintage aren't of great quality,
at least in my experience.? Given the symptoms you describe I'd
check the centrifugal switch, which might not be closing (making)
consistently.? A switch might be more likely to give intermittent
symptoms than a capacitor.? Does it move freely?? Are the
contacts clean??? There are lots of different styles of
centrifugal switch and I don't know what you have.
am
At 09:04 AM 4/15/2020 -0700, you wrote:
I have a 1980s Jet Taiwan built
saw that I purchased used a while back.? It stalls starting and
buzzes sometimes, classic capacitor symptoms.? After removing the
cover it was clear that the capacitor had been replaced before.? I
ordered another one with the same ratings and it was worse than what was
in there to start with.? I suspect the one in there that was
installed by a previous owner was not the correct capacitor.? Does
anyone know what the specs are for the correct capacitor?
Thanks
Dave
|
I second checking the centrifugal switch. Capacitors generally do not heal themselves.?
On Wed, Apr 15, 2020, 9:51 AM Alan Muller < alan@...> wrote:
Many Taiwan motors of this vintage aren't of great quality,
at least in my experience.? Given the symptoms you describe I'd
check the centrifugal switch, which might not be closing (making)
consistently.? A switch might be more likely to give intermittent
symptoms than a capacitor.? Does it move freely?? Are the
contacts clean??? There are lots of different styles of
centrifugal switch and I don't know what you have.
am
At 09:04 AM 4/15/2020 -0700, you wrote:
I have a 1980s Jet Taiwan built
saw that I purchased used a while back.? It stalls starting and
buzzes sometimes, classic capacitor symptoms.? After removing the
cover it was clear that the capacitor had been replaced before.? I
ordered another one with the same ratings and it was worse than what was
in there to start with.? I suspect the one in there that was
installed by a previous owner was not the correct capacitor.? Does
anyone know what the specs are for the correct capacitor?
Thanks
Dave
|
Many Taiwan motors of this vintage aren't of great quality,
at least in my experience.? Given the symptoms you describe I'd
check the centrifugal switch, which might not be closing (making)
consistently.? A switch might be more likely to give intermittent
symptoms than a capacitor.? Does it move freely?? Are the
contacts clean??? There are lots of different styles of
centrifugal switch and I don't know what you have.
am
At 09:04 AM 4/15/2020 -0700, you wrote:
toggle quoted message
Show quoted text
I have a 1980s Jet Taiwan built
saw that I purchased used a while back.? It stalls starting and
buzzes sometimes, classic capacitor symptoms.? After removing the
cover it was clear that the capacitor had been replaced before.? I
ordered another one with the same ratings and it was worse than what was
in there to start with.? I suspect the one in there that was
installed by a previous owner was not the correct capacitor.? Does
anyone know what the specs are for the correct capacitor?
Thanks
Dave
|
I have a 1980s Jet Taiwan built saw that I purchased used a while back. ?It stalls starting and buzzes sometimes, classic capacitor symptoms. ?After removing the cover it was clear that the capacitor had been replaced before. ?I ordered another one with the same ratings and it was worse than what was in there to start with. ?I suspect the one in there that was installed by a previous owner was not the correct capacitor. ?Does anyone know what the specs are for the correct capacitor?
Thanks
Dave
|
Re: The blade. What’s the best all-around?
Wow. ?Tremendous information. ?Thank you for figuring this all out. ?Thank you for writing it all up so clearly. ?Thank you for sharing. ?-Bill
|
Re: The blade. What’s the best all-around?
On 4/12/2020 4:35 AM, John Vreede wrote: Hi guys
The attached might prove useful.
Its been loaded into the files section too - jv ? Very informative John ! ? -- ? Snag
|
Re: The blade. What’s the best all-around?
Hi guys
The attached might prove useful.
Its been loaded into the files section too - jv
|
Re: The blade. What’s the best all-around?
I have been happy with, and continue to use,??Bi metal for $17. ?I have not done any sort of ?comparative analysis of blades, but the cheaper ones were not worth the savings. ?I run it on high speed for all materials. ?Works fine for wood, aluminum, copper, brass, titanium, tungsten, and most steels. ?Does not work on hardened steel. ?-Bill
|
Re: The blade. What’s the best all-around?
I've been using the $30 HF blades for years and they usually work very well; however, the last one I bought was bent, not to the side, but along the length of the blade. It still cuts straight, but it hops in and out as it runs, which will wear the hop-in part of the blade pretty quickly.
-Dave
On Friday, April 10, 2020, 09:57:15 AM PDT, Terry Coombs <snagone@...> wrote:
On 4/9/2020 9:27 PM, WHEELER GREEN wrote:
> Believe it or not, harbor freight sells a bi-metal blade. It's made in
> the USA. The last time I checked it was around $21. You should be able
> to use your 20% off coupon.
>
> Wheeler
>
? Last time I got one of those it was like $29.99 ... and it still is -
that's the 64 1/2 10/14 bimetal supercut blade . The Chicago Electric 18
tpi is 17 bucks , didn't see one that was priced at $21 ...
? --
? Snag
|
Re: The blade. What’s the best all-around?
On 4/9/2020 9:27 PM, WHEELER GREEN wrote: Believe it or not, harbor freight sells a bi-metal blade. It's made in the USA. The last time I checked it was around $21. You should be able to use your 20% off coupon.
Wheeler
? Last time I got one of those it was like $29.99 ... and it still is - that's the 64 1/2 10/14 bimetal supercut blade . The Chicago Electric 18 tpi is 17 bucks , didn't see one that was priced at $21 ... ? -- ? Snag
|
Re: The blade. What’s the best all-around?
I'm new to the 4x6 bandsaw scene. I only paid $17 for this blade off Amazon.
https://amzn.to/3bi5Be2
So far, it's been cutting great. Is this brand any good? Is there something I should be looking for? Sorry for the noob questions.
Terry Coombs wrote:
toggle quoted message
Show quoted text
On 4/9/2020 11:27 PM, Carl Hollopeter wrote:
Sorry, forgot the link.
https://www.ebay.com/itm/64-1-2-5-4-1-2-x-1-2-x-025-x-10-14N-Band-Saw-Blade-M42-Bi-metal-1-Pc/262465897212?hash=item3d1c2fc2fc:g:SVwAAOSwmgJY49jy
Carl H
|
Re: The blade. What’s the best all-around?
Believe it or not, harbor freight sells a bi-metal blade. It's made in the USA. The last time I checked it was around $21. You should be able to use your 20% off coupon.
Wheeler
Sent via the Samsung Galaxy S7 edge, an AT&T 4G LTE smartphone
toggle quoted message
Show quoted text
-------- Original message -------- From: Terry Coombs <snagone@...> Date: 4/9/20 9:42 PM (GMT-05:00) Subject: Re: [4x6bandsaw] The blade. What’s the best all-around?
On 4/9/2020 8:05 PM, Joe Blount wrote:
I broke my blade a few days ago and it is time to pick out
another.? I remembered this thread, so I came back to review.?
I can't add anything on the recommendations - you guys know
far more than me.
But I thought I'd pass along that
sels the linux blade Bill linked to below.? Their current
price is $26.95, free shipping for orders over $50.? They
often have coupon codes giving a discount? on larger orders.
?
?
-Joe
On Sun, Feb 23, 2020 at
11:50 AM Bill Armstrong < bill_1955@...>
wrote:
FYI
Chris, and all,
?
Here’s
the Irwin blade I have been buying:
My
MSC price is $21.99. It was $14.99 last time I
bought a couple.
?
This
is (I think) the Lenox blade I was originally
buying:
My
MSC price is $30.15.
?
I
don’t know if you get a discount at MSC. My Enco
discount was carried over when they killed off the
Enco brand. (most of us wish that didn’t happen)
Without
a discount, I would sure be checking prices
elsewhere. Pays to shop, regardless!
J
They
do have a free shipping (UPS ground only) special on
right now, and valid to 5/23/20. Use promo code
FREE90.
?
Might
be worth your while and wallet, to try both brands.
?
Bill
?
?
Thanks
to Bill and Terry
On Feb
23, 2020, at 10:31 AM, Bill Armstrong <bill_1955@...>
wrote:
? I suggest a bi-metal 10-14
tooth. That is all I use for everything, for
steel, aluminum, bronze, and plastics.?
Lenox is an excellent
choice.?
I started using Irwin blades
several years ago, when Enco quit stocking
Lenox.? They don’t last quite as long, but the
cost half what a Lenox does.?
Bill
?Brand new owner and want
to buy a good Lenox blade. I’ll be cutting
bar stock from 1/4” through 1” and angle
iron up to 2”x2”x1/4” and square tubing 1/8”
thick 2”x2”. All mild steel. What would be
my best blade selection if I only selected
one blade? Many thanks.
_._,_._,_
? Kewl , just scored a 10/14 and an 18TPI for my 4x6 (ref my last
post)? , total under 42 bucks and shipping was indeed free . Did I
mention that I like these guys blades ?
|
Jerry Durand
John Vreede