Search:

Type: Posts; User: dmorse

Page 1 of 4 1 2 3 4

Search: Search took 0.01 seconds.

  1. Replies
    7
    Views
    712

    fixed

    fixed
  2. Replies
    5
    Views
    568

    This horizontal cyclone...

    This horizontal cyclone has a some good reviews in the US. Can you get it in Australia? It's made in China.
  3. Some other threads here on the same subject: ...

    Some other threads here on the same subject:

    Improvised Ambient Air Filter
    Air purifier using a box fan
    researching room air filter - Corsi-Rosenthal box- replacin Merv 13- MPR 1800 or 1900
  4. Replies
    13
    Views
    1,552

    A larger nozzle can help a lot with print time...

    A larger nozzle can help a lot with print time when you don't need so much resolution. I switch to a 0.8 mm nozzle for dust fittings and print with 1.3 mm line widths and 0.6 mm layer heights. That...
  5. Replies
    13
    Views
    1,552

    Nice! 3D printers can solve a lot of problems. ...

    Nice! 3D printers can solve a lot of problems.

    I used Fusion 360 to design my fittings. I really need to work with SCAD some more. Here's one of my threaded hose fittings, it's 150 mm:
    ...
  6. Replies
    7
    Views
    1,063

    It's a bit of an exaggeration to call that a...

    It's a bit of an exaggeration to call that a "whole house" unit. In the US the Industry standard for air cleaners is AHAM AC-1. If the CADR (clean air delivery rate) were actually "Powerful...
  7. Barry, let me say again - for a room air cleaner...

    Barry, let me say again - for a room air cleaner the MPR1000 will be very close in performance to the MPR1900. The more expensive filter will clean the air a bit faster but both can clean to as low...
  8. Assuming you are trying to clean the air after...

    Assuming you are trying to clean the air after the garage door has been closed then, yes, a room air cleaner will help.

    Pollen is easy to capture. Most grains are in the 10 to 100 micron range...
  9. Replies
    34
    Views
    2,913

    I don't have room in my shop to have a permanent...

    I don't have room in my shop to have a permanent location for my shaper. I need to move it out of the way sometimes. That means no permanent ducting and any fittings that I want to leave connected...
  10. Replies
    10
    Views
    586

    Nice looking boxes Bob. Looks like you did a...

    Nice looking boxes Bob. Looks like you did a good job on the printer setup.

    What material did you use for the glands? Do you have a link to the files or are those your design?

    - - - Updated -...
  11. Replies
    2
    Views
    395

    Isn't this ambitious.

    Just posted on reddit. I'll withhold comment for now.
  12. Replies
    7
    Views
    1,063

    Yes, yes and yes. I've done a lot of testing...

    Yes, yes and yes.

    I've done a lot of testing on a single filter version but not the setup you're asking about. For that, I've worked with others testing the four filter arrangement, providing...
  13. Replies
    7
    Views
    1,063

    This post went missing for a while so I posted...

    This post went missing for a while so I posted again. Now it shows up! Now it's gone.
  14. Replies
    50
    Views
    5,178

    I'm referring to the separator that came with the...

    I'm referring to the separator that came with the DC. Specifically that ring shaped sheet metal piece that supports the lower bag and the filter. It's a mediocre separator and becomes redundant...
  15. Replies
    50
    Views
    5,178

    Well, it's certainly less "efficient" in the...

    Well, it's certainly less "efficient" in the sense that having a redundant centrifugal separator improves nothing and seriously hurts airflow. That harmless looking "bag and filter holder" adds...
  16. Replies
    14
    Views
    1,017

    I use a leaf blower. Outdoors of course. Make...

    I use a leaf blower. Outdoors of course. Make allowance for wind direction, preferably before you you start.
  17. Replies
    20
    Views
    1,825

    Welcome to another rabbit hole! I bought my...

    Welcome to another rabbit hole! I bought my first printer to make boxes for dust sensors. The next things I printed were pipe fittings for dust collection, leading of course to getting a bigger...
  18. He will use a VFD. Higher RPM compensates the...

    He will use a VFD. Higher RPM compensates the smaller impeller diameter.



    Gregg's link includes a link to the manual.
  19. (Greg, I've PMed you a link to my collection of...

    (Greg, I've PMed you a link to my collection of relevant documents that I've culled from the internet over the last few years.)

    Before you get too wrapped up in trying to make calculations align...
  20. Replies
    60
    Views
    3,778

    There's nothing "old" about a radial design...

    There's nothing "old" about a radial design compared to either a backward curve or forward curve. They have different characteristics and the blade angle is chosen to meet the requirements of the...
  21. Replies
    60
    Views
    3,778

    i would prioritize investigating the used unit...

    i would prioritize investigating the used unit you referenced. It's impeller is almost certainly larger than 14" and includes the housing and a 4 kW motor for about the same price as the Jet part.
    ...
  22. Replies
    60
    Views
    3,778

    No, sorry, I don't.

    No, sorry, I don't.
  23. Replies
    60
    Views
    3,778

    Yes, you should be able to compensate some for...

    Yes, you should be able to compensate some for the size difference, BUT, beware the power demand. You don't want to use more than the motor is rated to deliver. Keep an eye on the current draw.

    ...
  24. Replies
    60
    Views
    3,778

    How about some numbers for a little perspective...

    How about some numbers for a little perspective here?

    All else being the same:
    -- A 14" fan will generate approximately 7% less flow and 14% less pressure than a 15" fan.
    -- A 14" fan...
  25. Your "Dust Measurements" chart labels the Y axis...

    Your "Dust Measurements" chart labels the Y axis as "μm". What exactly are you displaying there? It seems like that should be "μg/m³".

    Nice switch labels!
  26. Replies
    18
    Views
    1,456

    Yes, it will work as is. You can make it bigger...

    Yes, it will work as is. You can make it bigger to get less airflow reduction but will have lower collection efficiency.

    I don't really understand why you expect a cyclone to solve an uneven bag...
  27. Replies
    6
    Views
    416

    More like 1000Pa = 4" w.g.

    More like 1000Pa = 4" w.g.
  28. Replies
    34
    Views
    2,913

    Thanks for filling in the blank in the N50 row. ...

    Thanks for filling in the blank in the N50 row. It certainly fits the rest of the data. Interesting that the magnet arrangement has a noticeable effect. Yet another puzzle to ponder.

    Actually,...
  29. Replies
    34
    Views
    2,913

    Well, bitingmidge's thread...

    Well, bitingmidge's thread and this one have given me the incentive get moving again on my magnetic coupler project. It was stalled due to lack of a satisfactory approach to fastening the magnets to...
  30. Replies
    61
    Views
    15,130

    Sticky: The IPEX Canplas brand of 90s appears to...

    The IPEX Canplas brand of 90s appears to available at several places at a reasonable price.
    490253
    490254
    490252
    I've not used any of these so be sure they're what they look like they are before...
  31. Replies
    61
    Views
    15,130

    Sticky: The issue is that the only 45s available are...

    The issue is that the only 45s available are .5R/D. According to the Cincinnati Fan chart you showed, two of them should have the same loss as a single 90, although Bob's data shows it to be less. ...
  32. Replies
    34
    Views
    2,913

    Those look nice. I've been playing around with...

    Those look nice. I've been playing around with the same idea but haven't actually made anything other that a few test parts so far.

    I have a few questions if you don't mind.

    You said "V1 of...
  33. Replies
    61
    Views
    15,130

    Sticky: The table on that page does not go below 1.5 R/D....

    The table on that page does not go below 1.5 R/D. How are you extrapolating that to .5 and .833?

    ASHRAE/SMACNA tabulate the following


    R/D Loss coefficient
    0.5 0.71
    .75 .33
    1.0 ...
  34. Replies
    61
    Views
    15,130

    Sticky: First, in the US DWV is not normally used for...

    First, in the US DWV is not normally used for dust collection. Sewer and Drain is what most people use. DWV has an OD that's compatible with pressure pipe, i.e., Schedule 40 or 80. S&D is...
  35. It's less about the filter than it is the...

    It's less about the filter than it is the collector ring that holds the filter and bag. The collector ring is actually a simple centrifugal separator. Think of it as a very rudimentary cyclone. As...
  36. Replies
    13
    Views
    986

    Well, I was motivated to order two more 5003s. ...

    Well, I was motivated to order two more 5003s. In April I'll have three of those and can compare them to the three A003s that I'm currently using. The big problem will be generating enough dust to...
  37. Replies
    13
    Views
    986

    Thanks Bob. I've seen that report. Too bad they...

    Thanks Bob. I've seen that report. Too bad they didn't do a tear down of the PMS7003 like they did with the 5003. It would be interesting to see if there were any hardware differences beside the...
  38. Replies
    13
    Views
    986

    Bob, can you share what you know about the actual...

    Bob, can you share what you know about the actual differences (other than size) between the 5003, 7003, and A003?
  39. Replies
    14
    Views
    1,011

    Horizontal cyclone separators are not unusual in...

    Horizontal cyclone separators are not unusual in industrial processing equipment and, as pointed out, in consumer rugsuckers. The only example I'm aware of for dust collection in hobby woodworking...
  40. Replies
    18
    Views
    1,050

    Same here. It's good to know that a 1.6 mm gap...

    Same here. It's good to know that a 1.6 mm gap works well enough.

    This can be a useful resource.
  41. Actually, you can get Dylos equivalent readings...

    Actually, you can get Dylos equivalent readings from that device. There's an alternate display mode that shows the raw particle counts. The Dylos shows the number of particles greater than 0.5 and...
  42. Replies
    22
    Views
    4,095

    Link to item on Aliexpress?

    Link to item on Aliexpress?
  43. Replies
    5
    Views
    568

    Which way do those disks rotate?

    Which way do those disks rotate?
  44. Onshape looks interesting. Do you know if it can...

    Onshape looks interesting. Do you know if it can do a constant area loft? That's something F360 won't do.
  45. Nicely done. I also prefer threaded fittings for...

    Nicely done. I also prefer threaded fittings for hose connections. What design software are you using? I use the coil tool in Fusion 360 for mine.

    I move my DC from machine to machine so I put...
  46. Replies
    15
    Views
    2,025

    Good to know. I wouldn't have expected the...

    Good to know. I wouldn't have expected the angled surface to be smooth enough for good bonding with CA. Time for a few tests.

    What layer height are you using?
  47. Replies
    15
    Views
    2,025

    That's an impressive fitting. You certainly have...

    That's an impressive fitting. You certainly have a flair for design.

    I don't see any locating features like Bernmc has. How do you keep things aligned during glue up? What adhesive are you...
  48. Replies
    7
    Views
    669

    That's up to you, not the motor. Without a load...

    That's up to you, not the motor. Without a load a motor only draws a moderate idling current. As the load is increased to the full rated load the current increases to the full load current. The...
  49. Replies
    9
    Views
    983

    No. 13.9 A is the current drawn by the motor...

    No. 13.9 A is the current drawn by the motor when loaded to it's full rating. The actual current drawn in use depends upon lots of things, including feed rate, blade sharpness, material thickness...
  50. Replies
    22
    Views
    1,779

    That steel ring you called a 'separator' is...

    That steel ring you called a 'separator' is usually called a collector ring or bag holder. I call it a separator ring. As far as I'm concerned your nomenclature is absolutely correct.:U

    The...
Results 1 to 50 of 189
Page 1 of 4 1 2 3 4