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Type: Posts; User: BobL

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  1. Replies
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    Thinner slabs does mean more warping especially...

    Thinner slabs does mean more warping especially if they are poorly stored - see below

    But thickness should depend in part on potential use.
    If you want boards then 50 or 55 mm mm will shrink by...
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    VFD install summaries...

    VFD install summaries

    If you take a close up photo of the motor name plate we can provide more Information on the suitability of the motor.
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    Installing exhaust fans at opposite ends off a...

    Installing exhaust fans at opposite ends off a shed and having them both exhaust outwards would mean they could be fighting each other for air and dust.
    It's usually better to have a large opening...
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    Good Sammys will take electricals here in WA as...

    Good Sammys will take electricals here in WA as they have team off volunteer sparkies that test and tag the gear.

    However, the gear has to be in working condition and in some cases are close to...
  5. Thread: Extraction Layout

    by BobL
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    As it's not that big a shed I'd keep it simple by...

    As it's not that big a shed I'd keep it simple by running a trunk line from the DC across the middle of the lower half of the shed above the TS and BS and use Y's for take offs to the other Machines.
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    I doubt the metal tubes can be bent but the...

    I doubt the metal tubes can be bent but the connected silicone tubes are of course easily bent and could be housed inside an appropriate streamlined housing. The first thing I want to do is just see...
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    I assume you mean of the pitot tube? if so 4.0 mm

    I assume you mean of the pitot tube? if so 4.0 mm
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    The Pixhawk sensor and pitot tube turned up...

    The Pixhawk sensor and pitot tube turned up today.
    Boy is it small.
    The LR44 cell has nothing to do with it , I just included iti in the photo to show scale.

    No I'll have to do something wth...
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    Tools for mens sheds

    Got a call from my daughter-in-law last week to see if I wanted to run triage on the old tools in her deceased Grandfather's shed so I went around on Sunday with my son and had a look. Mostly older,...
  10. Thread: complete noob

    by BobL
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    Well at least that's better than the other way...

    Well at least that's better than the other way around :)
  11. Thread: lathe lighting ?

    by BobL
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    1,978

    My experience is that LED or fluoro spots are...

    My experience is that LED or fluoro spots are more of a problem in this regard than extended light sources like tubes, even less with multiple tubes.

    Directly above my WW lathe I have a pair of...
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    FWIW the Sheppach at the mens shed lasted about 3...

    FWIW the Sheppach at the mens shed lasted about 3 months (during which time it was heavily used) before the motor died. It could have been a "one of" , and I also cannot vouch for the (lack of)...
  13. Thread: PVC pipe setup

    by BobL
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    1,117

    [QUOTE=qwertyu;2170655]wow the ezi-duct is...

    150 mm duct and fittings are cross compatible with DWV. There's no such thing as 100 mm stormwater (closest is 90 mm stormwater).
  14. Thread: PVC pipe setup

    by BobL
    Replies
    27
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    1,117

    [QUOTE=qwertyu;2170655]wow the ezi-duct is...

    150 mm duct and fittings are cross compatible with DWV. There's no such thing as 100 mm stormwater (closest is 90 mm stormwater).
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    1.5 F should be OK. Using a cap of a higher...

    1.5 F should be OK.
    Using a cap of a higher (but not lower) Voltage is also permissible.

    Given the smallish size of cap it sounds more like it is a "run" rather than a start cap, if so the...
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    I agree with this but as Mark says he's putting...

    I agree with this but as Mark says he's putting his machines on wheels he should be able to move things around to suit.

    FWIW Although I have several machines on wheels or plastic skids I'm not a...
  17. Thread: PVC pipe setup

    by BobL
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    1,117

    Using a 90 on a terminal Machine is no biggie as...

    Using a 90 on a terminal Machine is no biggie as a 90 is easy to remove if the trunk/main duct needs extending.

    Bearing in mind that even blanked off junctions add further to turbulence and...
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    The age and symptoms suggest it's blown the...

    The age and symptoms suggest it's blown the commutator - bin job i'm afraid.
  19. Thread: PVC pipe setup

    by BobL
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    1,117

    The least resistive transition from 200 to 150 mm...

    The least resistive transition from 200 to 150 mm is a tapered transition. A rule of thumb is the translition length should be about 10 duct diameters but this can be difficult to make and fit into...
  20. Thread: Damper

    by BobL
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    323

    SWMBO has done a very similar version in our camp...

    SWMBO has done a very similar version in our camp oven with black olives and garlic.
    The smoke imparts an interesting added flavour.

    467313
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    Thanks It's also that you said it was a a 2...

    Thanks

    It's also that you said it was a a 2 psi sensor?


    I agree about the noise issue. With my DC pressure sensor I have the sensor right alongside the MCU and run 1/4" irrigation tubing the...
  22. Our "beer" fridge is always kept full. When I...

    Our "beer" fridge is always kept full.

    When I say "beer" it only has about a 6-pack worth of beer in it
    The remainder consists of about 2 dozen bottles of wine for SWMBO, a few cool drinks (for...
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    Good to hear you escaped the fires.

    Good to hear you escaped the fires.
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    The kit I looked at said; Featuring a...

    The kit I looked at said;
    Featuring a Measurement Specialties 4525DO sensor, with 1 psi measurement range (roughly up to 100 m/s or 360 km/h or 223 mp/h), the Pixhawk Airspeed Sensor Kit enables a...
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    As I said above "Their geometry means they don't...

    As I said above "Their geometry means they don't immediately suit duct air speed measurements"

    A bent pitot tube would be better since it enables easy orientation directly into the air flow and...
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    Leather (rawhide) has been a used for a long time...

    Leather (rawhide) has been a used for a long time (I've seen a leather lined vice in a medieval era luthiers workshop in northern Italy) and is what I lined my main bench vices faces with 14 years...
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    Interesting air flow sensor developments

    Developments in drone technology has resulted in some interesting new mini sensors arriving on the scene.
    Air speed sensors kits like this small pitot tube, pressure sensor and ADC look like they...
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    There is usually (sometimes quite a large) a...

    There is usually (sometimes quite a large) a difference between optimum bench heights and machine working surface heights.

    I knew I wanted my bench tops at more than 900 mm high so I made my first...
  29. Yep 'New Posts', lists all posts for the last few...

    Yep 'New Posts', lists all posts for the last few days and will also tell you what new posts have appeared since your last visit to the "new posts" page.

    I have the new posts page permanently...
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    My take on heights is that it should most of all...

    My take on heights is that it should most of all suit the specific individual using the machinery.

    Some examples.
    With a DP I like to be able to easily look down onto the locating mark of the...
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    I finally got around to assembling a Li-ion...

    I finally got around to assembling a Li-ion battery pack consisting of a pair of (18650 3.7V Li-ion) batteries in series, in turn in parallel with another two batteries in series.
    Fully charged...
  32. Thread: Saw blade cleaner

    by BobL
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    729

    How did you do it - wipe on rub of? If so I am...

    How did you do it - wipe on rub of? If so I am not surprised they did not work.
    I found the leaving the blade to soak overnight works to loosen hardened sap.
    Even coffee grounds soaked in hot...
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    Saw specialist and GP who now both reckon its...

    Saw specialist and GP who now both reckon its gout so now I'm on two anti inflammatories. Not much improvement after two days.
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    WEST AUST New in the USA they cost about US$250 so they...

    New in the USA they cost about US$250 so they probably sold for ~AU$500 and this website says AUS$518 see Delta SA350K Spindle Sander Comes with a Smooth Running Motor and Dust Bag
    If its in good...
  35. Thanks for that info. I agree the averaging...

    Thanks for that info.


    I agree the averaging capabilities of the Testo are very useful but I just realised that the max air speeds (3300 fpm) in your 150 mm duct is considerably lower than mine...
  36. This is a good point worth raising but I have not...

    This is a good point worth raising but I have not seen this problem probably because the air temperature outside my ducts don't differ significantly from inside the duct ,and because I use a 240 mm...
  37. I'm not sure if this feasible but what DC volts...

    I'm not sure if this feasible but what DC volts does each panel output, You may be able to reconfigure their connections so as to completely by pass the inverter and use a DC motor driven a fan(s)....
  38. Thread: PVC pipe setup

    by BobL
    Replies
    27
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    1,117

    Retrofitting is pretty easy - shop around and...

    Retrofitting is pretty easy - shop around and make up adapters as required.

    The 1 and 5 micron ratings are nominal but once either the bags or pleated filters (PFs) are conditioned the ACTUAL...
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    After yesterday's walk my ankles and shins...

    After yesterday's walk my ankles and shins continued to get sorer during the day and by the end of the day were worse than ever but again with assistance from analgesics, and some ice packs, I...
  40. Thread: PVC pipe setup

    by BobL
    Replies
    27
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    1,117

    There's no way to reduce the number of bags and...

    There's no way to reduce the number of bags and not lose suction. Also adding a cyclone will reduce flow - more so it its a after market DC. To minimise flow loses cyclones need to be properly paired...
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    Well the meds appear to have done something...

    Well the meds appear to have done something helpful. Last night, with some assistance from analgesics I managed to get some sleep. This morning I drove my dogs down to a local park and parked next...
  42. Thread: PVC pipe setup

    by BobL
    Replies
    27
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    1,117

    :2tsup: :2tsup:

    :2tsup:


    :2tsup:
  43. Thread: PVC pipe setup

    by BobL
    Replies
    27
    Views
    1,117

    The safest solution is to have the DC outside the...

    The safest solution is to have the DC outside the shed
    OR
    Enclosed in an air tight enclosure inside the shed and vented outside the shed.
    This suggests the best place is not in the middle of the...
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    On Xmas eve, on top of the usual degree of...

    On Xmas eve, on top of the usual degree of tiredness my right ankle started swelling and aching and over the week between Xmas and NY it got so bad I can now only hobble about 20m without needing a...
  45. I've examined dozens of small (5HP or less) DCs...

    I've examined dozens of small (5HP or less) DCs mainly for leaks, and can't recall any significant differences in motors, or metal thickness used. The only obvious material differences I've...
  46. Sure, but breakers should not be routinely used...

    Sure, but breakers should not be routinely used to protect appliances.

    10A GPOs are usually run on circuits with 16A breakers and some 15A GPOs might even run on 20A circuits.
    Breakers are not...
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    Sorry can't comment on the 220-380V VFD but these...

    Sorry can't comment on the 220-380V VFD but these motors can be converted intyernally to run as a single speed 220V, since then using a VFD will provide much more than 2 speeds. I have a 150mm wide...
  48. Thread: Summer nats

    by BobL
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    730

    Given the planet is fast running out of arable...

    Given the planet is fast running out of arable land, using such land for a non productive crop is perhaps an even better reason.

    The burn out dudes could improve air quality a bit by using...
  49. Short answer is yes but the change in speed is...

    Short answer is yes but the change in speed is usually small, and the direction of the speed change is counter intuitive.

    A motor/impeller with large unrestricted entry and exit ports will turn...
  50. The reason that it's possible to use a 3HP to...

    The reason that it's possible to use a 3HP to drive a 14" impeller on that DC is probably because it's effectively operating as a semi-choked system (ie small inlets and outlets, bags etc) and the...
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