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High precison worm vs OPW-11?

[email protected] #59676 Hi! There has been tons of discussions on worm gears, but as I see more about OPW vs Ovision. My G11 apparently has the older stainless steel worms, so an upgrade is imminent. However, at least at Telescope Express, the high precision worm is sold, without the blocks and all: So the same 3-piece system I have now, but a better worm. Now, is that what I should do, or should I pay sbustantially more and get the OPW-11? How much do I gain from the one-piece device? Or is the high precision worm only useable with the one-piece system? It is sold both with and without the worm, which confuses me.. As on Losmandy's page: And how does these upgrades compare to the belville washer solution? Or is that just for DEC and the high precision worm just for RA.....? Magnus
Don Degidio All Messages By This Member #59677 开云体育 Magnus, The brass worm is really only needed on the RA, but having it on both axes gives you a spare, if ever needed. Getting the adjustment correct for the stock system goes a long way for performance. That means having both bearing blocks square to each other and having enough backlash for no binding and no lateral movement of the worm.? What I did years ago before the brass worm was available was use a cordless drill to drive the worm for 15 minutes in each direct with the finest lapping fluid I could find. Did a thorough clean up and readjustment. Was able to cut the backlash needed in half.? Don? Verizon Wireless 4G LTE toggle quoted message Show quoted text -------- Original message -------- From: "jfev5mnsvqiyzpq756wvokt55jve7sbg2esr5mip@... [Losmandy_users]" <Losmandy_users@...> Date: 11/30/2017 2:20 PM (GMT-05:00) To: Losmandy_users@... Subject: [Losmandy_users] High precison worm vs OPW-11? Hi! There has been tons of discussions on worm gears, but as I see more about OPW vs Ovision. My G11 apparently has the older stainless steel worms, so an upgrade is imminent. However, at least at Telescope Express, the high precision worm is sold, without the blocks and all: So the same 3-piece system I have now, but a better worm. Now, is that what I should do, or should I pay sbustantially more and get the OPW-11? How much do I gain from the one-piece device? Or is the high precision worm only useable with the one-piece system? It is sold both with and without the worm, which confuses me.. As on Losmandy's page: And how does these upgrades compare to the belville washer solution? Or is that just for DEC and the high precision worm just for RA.....? Magnus
Michael Herman All Messages By This Member #59678 Don, Ohers have also reported lapping helped, but Losmandy says it wears off the anodization on the ring gear, so they caution against doing that.?? David Partridge also got great results ...very low PE... using the 2 worm blocks. ..he might say what steps he used.?? Best, Michael? toggle quoted message Show quoted text On Nov 30, 2017 11:49 AM, "Don Degidio djd521@... [Losmandy_users]" <Losmandy_users@...> wrote: ? Magnus, The brass worm is really only needed on the RA, but having it on both axes gives you a spare, if ever needed. Getting the adjustment correct for the stock system goes a long way for performance. That means having both bearing blocks square to each other and having enough backlash for no binding and no lateral movement of the worm.? What I did years ago before the brass worm was available was use a cordless drill to drive the worm for 15 minutes in each direct with the finest lapping fluid I could find. Did a thorough clean up and readjustment. Was able to cut the backlash needed in half.? Don? Verizon Wireless 4G LTE -------- Original message -------- From: "jfev5mnsvqiyzpq756wvokt55jve7sbg2esr5mip@... [Losmandy_users]" <Losmandy_users@yahoogroups.com> Date: 11/30/2017 2:20 PM (GMT-05:00) To: Losmandy_users@... Subject: [Losmandy_users] High precison worm vs OPW-11? Hi! There has been tons of discussions on worm gears, but as I see more about OPW vs Ovision. My G11 apparently has the older stainless steel worms, so an upgrade is imminent. However, at least at Telescope Express, the high precision worm is sold, without the blocks and all: So the same 3-piece system I have now, but a better worm. Now, is that what I should do, or should I pay sbustantially more and get the OPW-11? How much do I gain from the one-piece device? Or is the high precision worm only useable with the one-piece system? It is sold both with and without the worm, which confuses me.. As on Losmandy's page: http://www.losmandy.com/access.html And how does these upgrades compare to the belville washer solution? Or is that just for DEC and the high precision worm just for RA.....? Magnus
Don Degidio All Messages By This Member #59681 Michael, I do understand the caution about removing the anodizing, but I think the worm wheel is made of 7075 aluminum, which is a very tough alloy. The pluses would outweigh the cons. Don toggle quoted message Show quoted text ----- Original Message ----- From: "Michael Herman mherman346@... [Losmandy_users]" <Losmandy_users@...> To: <Losmandy_users@...> Sent: Thursday, November 30, 2017 3:36 PM Subject: RE: [Losmandy_users] High precison worm vs OPW-11? Don, Ohers have also reported lapping helped, but Losmandy says it wears off the anodization on the ring gear, so they caution against doing that. David Partridge also got great results ...very low PE... using the 2 worm blocks. ..he might say what steps he used. Best, Michael
[email protected] #59700 Hi guys! My big question remains - can I use the high precision worm with my existing black blocks, or do I need the One Piece system? That is, can I just buy the far cheaper worm, or do I need the full, more expensive,? OPW device? Magnus
Chip Louie All Messages By This Member #59701 Hi Don, I think you can get significantly better/lower error rates by switching to the HP-worm and new OPW on the RA axis only. This runs about $275 plus shipping, well worth the money. I say this not because the HP-worm itself is so much better than the old worm (depends on which version worms you have) but because you will save so much time messing with trying to get your standard 2-piece worm setup not only square with each other, on the same axis and under enough bearing preload on the axis of the bearings that you will sing out loud. Of course people will think you are nuts but if they are out there in the dark with you they should not be throwing any stones if you know what I mean.?That's the trick and it is very hard to get just right consistently and your gear mesh will change as temperatures rise and fall. IF you get the gear mesh just right in the daytime when the temps fall as they tend to do your geartrain will slowly get tighter and tighter until the RA is lagging and ultimately stalls. This is very easy to resolve with any of the OPWs, you just loosen the fastener on side of the OPW and give the adjustment screw a nudge and snug the fastener down and you are GTG. This take less than a minute to do. and the bearings will always be perfectly aligned and under the correct preload.? My advice is that Scott know these mounts very well and has had to repair every possible yahoo's "improvements" to his mounts out there. Trust me when I say don't try to polish the worms, there is much better low hanging fruit which cause a lot fewer issues if things go sideways. I mean it's a lot cheaper to buy the HP-worm and new OPW than it is to also have to by a new worm wheel because you over did the polishing job or it wore through the anodizing and the worm chewed through the alloy worm wheel.? Chip
Don Degidio All Messages By This Member #59704 Chip, I'm running the Sidereal Technologies Servo System on my mount. Have made many improvements to my 1995 mount. Using belt drive with tucked under motors and have spring loaded the worms for no backlash. I am a home machinist and made all the customs parts needed. Don toggle quoted message Show quoted text ----- Original Message ----- From: "chiplouie@... [Losmandy_users]" <Losmandy_users@...> To: <Losmandy_users@...> Sent: Saturday, December 02, 2017 3:55 AM Subject: [Losmandy_users] Re: High precison worm vs OPW-11? Hi Don, I think you can get significantly better/lower error rates by switching to the HP-worm and new OPW on the RA axis only. This runs about $275 plus shipping, well worth the money. I say this not because the HP-worm itself is so much better than the old worm (depends on which version worms you have) but because you will save so much time messing with trying to get your standard 2-piece worm setup not only square with each other, on the same axis and under enough bearing preload on the axis of the bearings that you will sing out loud. Of course people will think you are nuts but if they are out there in the dark with you they should not be throwing any stones if you know what I mean. That's the trick and it is very hard to get just right consistently and your gear mesh will change as temperatures rise and fall. IF you get the gear mesh just right in the daytime when the temps fall as they tend to do your geartrain will slowly get tighter and tighter until the RA is lagging and ultimately stalls. This is very easy to resolve with any of the OPWs, you just loosen the fastener on side of the OPW and give the adjustment screw a nudge and snug the fastener down and you are GTG. This take less than a minute to do. and the bearings will always be perfectly aligned and under the correct preload. My advice is that Scott know these mounts very well and has had to repair every possible yahoo's "improvements" to his mounts out there. Trust me when I say don't try to polish the worms, there is much better low hanging fruit which cause a lot fewer issues if things go sideways. I mean it's a lot cheaper to buy the HP-worm and new OPW than it is to also have to by a new worm wheel because you over did the polishing job or it wore through the anodizing and the worm chewed through the alloy worm wheel. Chip
Don Degidio All Messages By This Member #59705 Magnus, Yes. Thought I already answered that. The brass worm was available before the OPW. Don toggle quoted message Show quoted text ----- Original Message ----- From: "jfev5mnsvqiyzpq756wvokt55jve7sbg2esr5mip@... [Losmandy_users]" <Losmandy_users@...> To: <Losmandy_users@...> Sent: Saturday, December 02, 2017 2:38 AM Subject: Re: [Losmandy_users] High precison worm vs OPW-11? Hi guys! My big question remains - can I use the high precision worm with my existing black blocks, or do I need the One Piece system? That is, can I just buy the far cheaper worm, or do I need the full, more expensive, OPW device? Magnus
[email protected] #59706 Hi! Great thanks. Yes, you probably did... I'm prone to loose myself somewhat in this discussion group format... Best, Magnus
Don Degidio All Messages By This Member #59707 开云体育 Magnus,? No problems. Three days ago officially became a senior citizen and noticed what comes along with age.? ?:-) Don? Verizon Wireless 4G LTE toggle quoted message Show quoted text -------- Original message -------- From: "jfev5mnsvqiyzpq756wvokt55jve7sbg2esr5mip@... [Losmandy_users]" <Losmandy_users@...> Date: 12/02/2017 8:10 AM (GMT-05:00) To: Losmandy_users@... Subject: Re: [Losmandy_users] High precison worm vs OPW-11? Hi! Great thanks. Yes, you probably did... I'm prone to loose myself somewhat in this discussion group format... Best, Magnus
Chip Louie All Messages By This Member #59716 Hi Magnus,? Yes you could buy just the HP-worm but as I posted to Don the new OPW is a lot cheaper than it used to be and it makes adjustment a lot faster and easier to accomplish. You only need the HP-worm and new OPW on the RA axis, the difference in tracking error is very significant.? Chip
Arnold De Bruin All Messages By This Member #59726 Hi Don, Can you elaborate on your drive setup? I mean, do you use dc serve motors tucked under with a belt drive? Cheers Arnold
George Cushing All Messages By This Member #59731 Here's an example of a tuck motor mod.??

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