My new speaker jig

bored184
bored184 Posts: 324
edited April 2013 in Vintage Speakers
Having a machinist as a father has it perks :cheesygrin:. I told him what I wanted and this is what he came up with. It started life as a a solid 6in OD piece of aluminum. I realigned the frozen MW6500 that came out of the RTA with it the other night and it worked beautifully.

2013-03-30_13-33-10_199_zps423ad6e9.jpg
2013-03-30_13-33-44_363_zpsa6b4ff97.jpg
Speakers: TL Monitor 10s, RTA 11TLs, Fortes, Thiel CS 1.2
Amplifiers: ]Ashly FTX 2001 III, Dynaco ST-70, DIY F6
Pre: Adcom GFP 750, Aikido Tube Pre
Post edited by bored184 on
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  • Schurkey
    Schurkey Posts: 2,101
    edited March 2013
    Makes my PVC coupler look like ****.

    Why is yours so tall? I cut my coupler in half to get rid of useless extra material. Do you actually need all those screws? I figure three to secure the tool, three to align the pole-piece.

    Polk_Magnet_04.jpg
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  • bored184
    bored184 Posts: 324
    edited March 2013
    I like the height because its gets the driver closer to me and I can see it better. The 6 smaller screws hold the driver in place while the 6 larger ones shift the magnet around. I went with six because I a previous jig I saw had six and my original PVC jig had six so its what I am used to. The larger screws are also fine thread where the smaller are course. It definitely over engineered but it works for me.
    Speakers: TL Monitor 10s, RTA 11TLs, Fortes, Thiel CS 1.2
    Amplifiers: ]Ashly FTX 2001 III, Dynaco ST-70, DIY F6
    Pre: Adcom GFP 750, Aikido Tube Pre
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  • PolkieMan
    PolkieMan Posts: 2,446
    edited March 2013
    I like them both but the Pvc one is one we can all do.
    I'm a Machinist / Cnc Programmer, 35 years, but the machines are always tied up and busy
    POLK SDA 2.3 TLS BOUGHT NEW IN 1990, Gimpod/Sonic Caps/Mills RDO-198
    POLK CSI-A6 POLK MONITOR 70'S ONKYO TX NR-808 SONY CDP-333ES
    PIONEER PL-510A SONY BDP S5100
    POLK SDA 1C BOUGHT USED 2011,Gimpod/Sonic Caps/Mills RDO-194
    ONKYO HT RC-360 SONY BDP S590 TECHNICS SL BD-1
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  • westmassguy
    westmassguy Posts: 6,850
    edited March 2013
    That's a beauty
    Home Theater/2 Channel:
    Front: SDA-2ATL forum.polkaudio.com/discussion/143984/my-2as-finally-finished-almost/p1
    Center: Custom Built forum.polkaudio.com/discussion/150760/my-center-channel-project/p1
    Surrounds & Rears: Custom Built forum.polkaudio.com/discussion/151647/my-surround-project/p1
    Sonicaps, Mills, RDO-194s-198s, Dynamat, Hurricane Nuts, Blackhole5
    Pioneer Elite VSX-72TXV, Carver PM-600, SVS PB2-Plus Subwoofer

    dhsspeakerservice.com/
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  • bored184
    bored184 Posts: 324
    edited March 2013
    bored184 wrote: »
    I like the height because its gets the driver closer to me and I can see it better. The 6 smaller screws hold the driver in place while the 6 larger ones shift the magnet around. I went with six because I a previous jig I saw had six and my original PVC jig had six so its what I am used to. The larger screws are also fine thread where the smaller are course. It definitely over engineered but it works for me.

    Nothing wrong with a pvc jig! Its not the size or material of the jig that matters, its being able to use it:cheesygrin:.
    Speakers: TL Monitor 10s, RTA 11TLs, Fortes, Thiel CS 1.2
    Amplifiers: ]Ashly FTX 2001 III, Dynaco ST-70, DIY F6
    Pre: Adcom GFP 750, Aikido Tube Pre
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  • Mr. Bubbles
    Mr. Bubbles Posts: 736
    edited March 2013
    Those look very nice, but too complicated to me for the job being done. I have used a piston ring compressor with shims for the top plate and back plate made from 1/3 circle PVC pieces. It self aligns the top and bottom plates and almost perfectly aligns the magnet as well . Not adjustments necessary. Semi snug it up on top plate, put some glue, slide in magnet, put some more glue and slide in the back plate (ok not just a simple slide at this point, but other than fighting the magnet not too bad) with a couple of shims, snug a little tighter to auto align the top and bottom plates and clamp lightly from front of basket to back of back plate to squeeze glue a little. Done, no adjustments necessary, only one screw to tighten the clamps. If I can locate my shims I'll set it up on a spare driver and take some pics.
    If con is the opposite of pro, is Congress the opposite of Progress?!


    Monitor 5Jr, Monitor 5, RTA12, RTA 15TL, SDA 2A, 1c, SRS 2, 1.2TL, CRS, Atrium.
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  • bored184
    bored184 Posts: 324
    edited April 2013
    Mr. Bubbles wrote: »
    Those look very nice, but too complicated to me for the job being done. I have used a piston ring compressor with shims for the top plate and back plate made from 1/3 circle PVC pieces. It self aligns the top and bottom plates and almost perfectly aligns the magnet as well . Not adjustments necessary. Semi snug it up on top plate, put some glue, slide in magnet, put some more glue and slide in the back plate (ok not just a simple slide at this point, but other than fighting the magnet not too bad) with a couple of shims, snug a little tighter to auto align the top and bottom plates and clamp lightly from front of basket to back of back plate to squeeze glue a little. Done, no adjustments necessary, only one screw to tighten the clamps. If I can locate my shims I'll set it up on a spare driver and take some pics.

    I would love to see it, the idea of auto align intrigues me.
    Speakers: TL Monitor 10s, RTA 11TLs, Fortes, Thiel CS 1.2
    Amplifiers: ]Ashly FTX 2001 III, Dynaco ST-70, DIY F6
    Pre: Adcom GFP 750, Aikido Tube Pre
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  • Mr. Bubbles
    Mr. Bubbles Posts: 736
    edited April 2013
    I looked for my shims last night but didn't find them. I'll look some more. I came up with the idea before reading about these types of jigs in the forums. I understand the concept of the jigs and yours looks super nice. My mind just seemed to simplify it in that basically all that is needed is to center the top plate (with its hole centered in it) with the back plate (with the pole piece already centered in it). This puts the pole piece in the center of the top plate hole creating and even gap all the way around. I realize this way may not be perfect if the voice coil is off center slightly but since the top plate is hard attached to the frames, if it is not then the voice coil will not be centered in the gap properly anyway. I simply cut the shims barely thicker than 1/2 the amount the magnet is wider than the top and bottom plates this puts half of the shim material total thickness all the way around the plates, this also pretty much centers the magnets as well. If I remember correctly I made these shims from ABS drain pipe (I could be mistaken as its been a while). Essentially 2 half circles the correct thickness and close in diameter. I cut a few grooves in them along the inside of the curve to increase their flexibility when clamping.
    If con is the opposite of pro, is Congress the opposite of Progress?!


    Monitor 5Jr, Monitor 5, RTA12, RTA 15TL, SDA 2A, 1c, SRS 2, 1.2TL, CRS, Atrium.
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  • 11tsteve
    11tsteve Posts: 1,166
    edited April 2013
    does anyone need a 6510 to practice with? i have a frozen one that will more than likely just go into the trash.
    Polk Lsi9
    N.E.W. A-20 class A 20W
    NAD 1020 completely refurbished
    Keces DA-131 mk.II
    Analysis Plus Copper Oval, Douglass, Morrow SUB3, Huffman Digital
    Paradigm DSP-3100 v.2
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  • Jhayman
    Jhayman Posts: 1,548
    edited April 2013
    How long does it take on a cnc machine to do something like that?
    I'm asking as I have no idea of the time frame required I'm guessing a few hours?
    if so can't you do one after hours therefore not interfering with paying jobs?
    PolkieMan wrote: »
    I like them both but the Pvc one is one we can all do.
    I'm a Machinist / Cnc Programmer, 35 years, but the machines are always tied up and busy
    ATC SCM40's,VTL TL 2.5 Preamp,PSB Stratus Goldi's,McCormack DNA 500,McCormack MAP-1 Preamp,Pro-Ject Xtension 10 TT,Ortofon Cadenza Red/Nordost RedDawn LS Speaker cables, Bryston BDP-2, Bryston BDA-2,PS Audio AC-3 power cables
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  • PolkieMan
    PolkieMan Posts: 2,446
    edited April 2013
    Don't trash it Steve someone will want it. Do you think it is still good, if the magnet is centered?
    11tsteve wrote: »
    does anyone need a 6510 to practice with? i have a frozen one that will more than likely just go into the trash.
    POLK SDA 2.3 TLS BOUGHT NEW IN 1990, Gimpod/Sonic Caps/Mills RDO-198
    POLK CSI-A6 POLK MONITOR 70'S ONKYO TX NR-808 SONY CDP-333ES
    PIONEER PL-510A SONY BDP S5100
    POLK SDA 1C BOUGHT USED 2011,Gimpod/Sonic Caps/Mills RDO-194
    ONKYO HT RC-360 SONY BDP S590 TECHNICS SL BD-1
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  • PolkieMan
    PolkieMan Posts: 2,446
    edited April 2013
    Big companies have big rules. :wink: If it was a solid piece of material ..face, drill, bore id, turn od, turnaround face to length and bevel id and od then the mill to drill and tap the od holes. 1st piece about 2 hours after that about .75 hour a piece.
    Jhayman wrote: »
    How long does it take on a cnc machine to do something like that?
    I'm asking as I have no idea of the time frame required I'm guessing a few hours?
    if so can't you do one after hours therefore not interfering with paying jobs?
    POLK SDA 2.3 TLS BOUGHT NEW IN 1990, Gimpod/Sonic Caps/Mills RDO-198
    POLK CSI-A6 POLK MONITOR 70'S ONKYO TX NR-808 SONY CDP-333ES
    PIONEER PL-510A SONY BDP S5100
    POLK SDA 1C BOUGHT USED 2011,Gimpod/Sonic Caps/Mills RDO-194
    ONKYO HT RC-360 SONY BDP S590 TECHNICS SL BD-1
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  • Schurkey
    Schurkey Posts: 2,101
    edited April 2013
    11tsteve wrote: »
    does anyone need a 6510 to practice with? i have a frozen one that will more than likely just go into the trash.
    How much?
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  • 11tsteve
    11tsteve Posts: 1,166
    edited April 2013
    PolkieMan wrote: »
    Don't trash it Steve someone will want it. Do you think it is still good, if the magnet is centered?
    it was a working driver. I was trying to remove it, the gasket was sticky, I was trying to put pressure from behind, and it gave way quite suddenly. The speaker was lying on the floor, the driver popped out and it fell to the floor.... and was frozen. I was lucky to have one more.
    Schurkey wrote: »
    How much?
    whatever.... PM with zip and I will run shipping. if its nothing too bad, $10 to help ship? I just hate to see it go to waste if it can still help.
    Polk Lsi9
    N.E.W. A-20 class A 20W
    NAD 1020 completely refurbished
    Keces DA-131 mk.II
    Analysis Plus Copper Oval, Douglass, Morrow SUB3, Huffman Digital
    Paradigm DSP-3100 v.2
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  • Saftgeek
    Saftgeek Posts: 114
    edited April 2013
    Very cool! I always tell my buddies that no matter what a person has for a hobby or interest it is always possible to spend a lot more money on it with the upgrades to gear, etc... I'd be willing to bet somewhere out there somebody's Granny is knitting with a set of titanium, super balanced $1000 custom knitting needles. All that said, I'm jealous. My PVC jig works, but it's not nearly as nice.

    Saftgeek-
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