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Type: Posts; User: Maple71
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20th May 2022, 07:59 AM
Thread: Digitising old 35mm slides
by Maple71- Replies
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Digitizing Slides
I had a couple thousand slides to digitize and wanted as good as possible results as reasonable. I used a Nikon Coolscan 5000 with a stack loader. The scanning software was Vuescan which I find is...
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14th May 2022, 12:11 PM
Thread: Small duct Measurement
by Maple71- Replies
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Apology
Deleted
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13th May 2022, 11:48 PM
Thread: Small duct Measurement
by Maple71- Replies
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Thanks for the responses...but I think I phrased...
Thanks for the responses...but I think I phrased it not clearly.
What type of setup is needed to measure the cfm of shop vacs? No doubt that you need to use a much larger test duct. How big a... -
13th May 2022, 09:59 AM
Thread: Small duct Measurement
by Maple71- Replies
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Small duct Measurement
I recently saw a video where a guy tried measuring the flow of shop vacs and extractors by using a vane anemometer at the end of 1.5 and 2.5" hoses. Does look accurate.
What is a reasonable... -
30th April 2022, 07:09 AM
Thread: wadkin RU lathe restoration
by Maple71- Replies
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An amazing restoration.... Looks great!!
An amazing restoration.... Looks great!!
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21st August 2021, 11:22 AM
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Those are ugly looking welds with stress risers. ...
Those are ugly looking welds with stress risers. They are ideal locations for cracks to start and run. I can not believe you have such poor welds on an impeller.
Note: my opinion is based on my... -
14th December 2020, 11:16 PM
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Thank you BobL for clarifying this issue.
Thank you BobL for clarifying this issue.
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23rd October 2020, 12:31 PM
Thread: Question for BobL
by Maple71- Replies
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I am curious about the cost to automate the gates...
I am curious about the cost to automate the gates in the men's shed. It seems like it is very costly.
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15th October 2020, 10:20 PM
Thread: A question for BobL
by Maple71- Replies
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Can one make a rectangular bell mouth hood? I...
Can one make a rectangular bell mouth hood? I thought that it would be great for a lathe.
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27th September 2020, 11:15 AM
Thread: Two 45s versus Long Radius 90 - PVC
by Maple71- Replies
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- 575
Thank you BobL!
Thank you BobL!
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27th September 2020, 12:38 AM
Thread: Two 45s versus Long Radius 90 - PVC
by Maple71- Replies
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- 575
Two 45s versus Long Radius 90 - PVC
I know there was some information comparing the SP loss of these two probably by BobL. I have spent a lot of time looking but have failed to find it. It is commonly thought the two 45s are better,...
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22nd September 2020, 07:35 AM
Thread: Improvised Ambient Air Filter
by Maple71- Replies
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Great experiment and interesting results.
Great experiment and interesting results.
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13th August 2020, 11:50 AM
Thread: Oneida extraction unit
by Maple71- Replies
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He almost hurt himself and the unit trying to put...
He almost hurt himself and the unit trying to put it up with a ladder...dumb idea.
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29th July 2020, 10:59 AM
Thread: Double Dust Collectors in Parallel
by Maple71- Replies
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I believe they are Grizzly brand 2 hp at 60 hz ...
I believe they are Grizzly brand 2 hp at 60 hz
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29th July 2020, 07:37 AM
Thread: Double Dust Collectors in Parallel
by Maple71- Replies
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Double Dust Collectors in Parallel
I recently saw a thread in another forum about using two 2 hp Dust collectors hooked up on one duct via two wyes. They reported measuring over 1800 cfm on a 6" duct using I pitot tube. Does this...
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20th May 2020, 03:36 AM
Thread: Dispersed Oil Particle generator
by Maple71- Replies
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Interesting concept. Does a liquid particle act...
Interesting concept. Does a liquid particle act the same as a dust particle.
? I would think there are significant differences in shape and surface tension. -
10th February 2020, 11:12 PM
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Interesting device and someone will do a 3d print...
Interesting device and someone will do a 3d print to make them.
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3rd December 2019, 11:23 PM
Thread: Lathe and BMH
by Maple71- Replies
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Interesting point about effectiveness of BMH and...
Interesting point about effectiveness of BMH and available pressure.
Would a properly sized/shaped BMH on a vacuum with high static pressure work well. I am thinking a 2.5" or 1 .25" hose. -
3rd December 2019, 03:06 AM
Thread: Lathe and BMH
by Maple71- Replies
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I understand that 6" hose and BMH would be better...
I understand that 6" hose and BMH would be better and an 8" would be even better. The issue for me becomes practically . A 6" inch hose is more expensive and I do not have one. I used what I have...
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3rd December 2019, 01:18 AM
Thread: Lathe and BMH
by Maple71- Replies
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Lathe and BMH
I finally setup my Shopsmith lathe with a BMH. I can not believe how well it works especially with the fine dust from sanding. A lot of the larger chips fall to the floor but that is OK> The finer...
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12th March 2019, 11:00 AM
Thread: DC systems pressure testing
by Maple71- Replies
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I can understand that calculating flow from the...
I can understand that calculating flow from the pressure and a performance curve lacks some level of accuracy. You have pointed out repeatedly how difficult it is to measure flow properly. Based on...
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11th March 2019, 12:47 PM
Thread: DC systems pressure testing
by Maple71- Replies
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I have a UEi manometer with the proper range. I...
I have a UEi manometer with the proper range. I just want pressure and will use a performance curve to estimate flow rate.
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11th March 2019, 04:00 AM
Thread: DC systems pressure testing
by Maple71- Replies
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It will be interesting to read how you use the...
It will be interesting to read how you use the information to understand and improve your system.
I read in another post some comments about measuring pressure in the pipes. What is the best... -
8th January 2019, 04:29 AM
Thread: Anemometer on special
by Maple71- Replies
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I think BobL has said all there needs to be said....
I think BobL has said all there needs to be said. The anemometer is not a good way to measure air flow in a duct. Also, measuring airflow at the end of a duct with any instrument is problematic due...
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31st December 2018, 12:38 AM
Thread: Bandsaw dust collection
by Maple71- Replies
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Great idea....always better to collect dust as...
Great idea....always better to collect dust as close to the source as possible.
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26th December 2018, 06:23 AM
Thread: Anemometer on special
by Maple71- Replies
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It is so easy to miss-interpret a post. One may...
It is so easy to miss-interpret a post. One may have posted something as a joke but you can not tell what they really meant. Sometimes you can add a sentence or something to indicate that what you...
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23rd December 2018, 12:47 PM
Thread: Anemometer on special
by Maple71- Replies
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I understand what BobL is saying and agree he is...
I understand what BobL is saying and agree he is correct.
However, there is a real downside to this problem. Many people are working on the dust collection and want to improve it. But how do you... -
22nd November 2018, 04:23 AM
Thread: Focused Dust Collection
by Maple71- Replies
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I do not worry about the chips and what does not...
I do not worry about the chips and what does not get sucked up gets swept.
I tried looking for something that showed velocity vectors for a BMH versus a naked pipe but did not find much but... -
21st November 2018, 12:25 AM
Thread: Focused Dust Collection
by Maple71- Replies
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Have you ever done any testing to see how much...
Have you ever done any testing to see how much deterioration in performance there is with an elbow before the BMH?
I look at your BMH setup with the bandsaw and got me wondering. The BMH has... -
20th November 2018, 01:17 AM
Thread: Focused Dust Collection
by Maple71- Replies
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BobL --- I have read and re-read your posts on...
BobL --- I have read and re-read your posts on BMH and other topics and it is very interesting and helpful.
I also took note of the tests you did on 90 degree elbows. After the comment about... -
17th November 2018, 01:54 PM
Thread: Focused Dust Collection
by Maple71- Replies
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I hope you noticed where I live and I quoted...
I hope you noticed where I live and I quoted prices for me.
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17th November 2018, 12:52 PM
Thread: Focused Dust Collection
by Maple71- Replies
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There are two 4" ports that I bought. Parts...
There are two 4" ports that I bought. Parts 260-403 for $2.89 and 260-411 for $2.99. Shipping is a flat $6.95. I bought them and that is what I paid. I do not know where you got the 8 times as...
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17th November 2018, 05:45 AM
Thread: Focused Dust Collection
by Maple71- Replies
- 38
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- 37,876
I have no doubt that a BMH changes the flow...
I have no doubt that a BMH changes the flow patterns as I completely understand that. My questions has nothing to do with that. I am asking about the 20% improvement in cfm that was mentioned and...
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16th November 2018, 11:14 PM
Thread: Focused Dust Collection
by Maple71- Replies
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So, how long does my 4" pipe need to be to reduce...
So, how long does my 4" pipe need to be to reduce turbulence so I can see the 20% improvement. Or what would someone need to do to be able to obtain the benefits of a BMH. It appears that it is not...
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16th November 2018, 12:45 PM
Thread: Focused Dust Collection
by Maple71- Replies
- 38
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- 37,876
I am very confused as earlier in the thread you...
I am very confused as earlier in the thread you stated-
"A bell mouth hood (BMH) increases the fine dust collection because they are very efficient increasing the flow by as much as 20% for a 100... -
16th November 2018, 10:35 AM
Thread: Focused Dust Collection
by Maple71- Replies
- 38
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Well, with the prospect of a 20% improvement in...
Well, with the prospect of a 20% improvement in flow, I put a BMH on my pipe.
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I checked the static pressure with and without the BMH several times. It went from about 7.90" to 7.70". ... -
11th November 2018, 12:31 AM
Thread: Focused Dust Collection
by Maple71- Replies
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I must not have had enough coffee this morning...
I must not have had enough coffee this morning but I do not understand your comment. Could you please explain a bit more. Thanks
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10th November 2018, 10:40 PM
Thread: Focused Dust Collection
by Maple71- Replies
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I measured 6 points across a pipe section at the...
I measured 6 points across a pipe section at the spots suggested in the literature. These were at 0.032, 0.135, 0.321, 0.679, 0.678, and 0.968 of the duct diameter. I did the test a couple of times...
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10th November 2018, 01:02 PM
Thread: Focused Dust Collection
by Maple71- Replies
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It is a 5 hp cyclone and measurements were made...
It is a 5 hp cyclone and measurements were made in a long section of straight duct across the duct in the proper positions using a Dwyer 471. Does this sound adequate?
Should I see a 20%... -
10th November 2018, 10:38 AM
Thread: Focused Dust Collection
by Maple71- Replies
- 38
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- 37,876
I am trying to understand thing.....So BMH on a...
I am trying to understand thing.....So BMH on a 100 mm pipe increases flow by as much as 20%. Right now, I get about 800 cfm from the pipe I show in the picture. Are you suggesting that if I put a...
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9th November 2018, 11:56 PM
Thread: Focused Dust Collection
by Maple71- Replies
- 38
- Views
- 37,876
Focused Dust Collection
I have read with interest the posts on bell mouthed dust pickups.
I use the following for dust collection from grinding with an die grinder or similar and get it close as possible to my work. A... -
11th October 2018, 11:39 AM
Thread: Square or rectangular vs round ducting
by Maple71- Replies
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Very interesting discussion on rectangular ducts....
Very interesting discussion on rectangular ducts. When trying to calculate or estimate losses, how do you take into account the surface roughness of the ducts. Both PVC and metal ducts are smooth...
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23rd July 2017, 09:16 AM
Thread: Wok is the wok for? - dust extractors
by Maple71- Replies
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Sorry, I do not have the Jet dust collector...
Sorry, I do not have the Jet dust collector anymore that I mentioned so can not measure the diameter.
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22nd July 2017, 08:41 AM
Thread: Wok is the wok for? - dust extractors
by Maple71- Replies
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I put the part in my Jet 1.5 HP dust collector...
I put the part in my Jet 1.5 HP dust collector with a canister filter. It made it into what was called the Vortex dust collector.
It kept the filter cleaner and didn't effect the performance. ... -
9th July 2017, 01:39 PM
Thread: New Drill Press
by Maple71- Replies
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I am a reader of this forum but have not...
I am a reader of this forum but have not contributed much. I live near Chicago in the U.S. and recently purchased the Nova Voyager Drill Press. It is a very solid machine with almost no run out on...
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1st February 2015, 05:22 AM
Thread: Hardening of sawplates
by Maple71- Replies
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Why Cryogenic Treatment?
I find it interesting that someone is suggesting cryogenic treatment. What grade of steel are you going to do this to? Does this grade of steel respond at all or are you just doing this for fun and...