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Electronics Repair (sci.electronics.repair) Discussion of repairing electronic equipment. Topics include requests for assistance, where to obtain servicing information and parts, techniques for diagnosis and repair, and annecdotes about success, failures and problems. |
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#1
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Old Garmin handheld GPS, battery problem
It seems the plastic housing has deformed to slightly oval tubes or
something, but no rechargeable AA size batteries (2x2) comfortably slide in and out. Had to cut in from the side to make an access point to lever out the 2 deeper AAs, wedged in ther, no corrossion , just lack of freeboard. Any ideas how to enlarge the bores a bit, no engineering reamer available. Those silly sandpaper cylinders on a rubber cylinder "mandrel" for "Dremmels" would do the job if there was a way to extend the shaft. I'll try the core of a "choc block" connector as a coupler, but any other ideas? |
#2
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Old Garmin handheld GPS, battery problem
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#3
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Old Garmin handheld GPS, battery problem
On 25/04/2016 18:04, MJC wrote:
In article , says... It seems the plastic housing has deformed to slightly oval tubes or something, but no rechargeable AA size batteries (2x2) comfortably slide in and out. Had to cut in from the side to make an access point to lever out the 2 deeper AAs, wedged in ther, no corrossion , just lack of freeboard. Any ideas how to enlarge the bores a bit, no engineering reamer available. Those silly sandpaper cylinders on a rubber cylinder "mandrel" for "Dremmels" would do the job if there was a way to extend the shaft. I'll try the core of a "choc block" connector as a coupler, but any other ideas? Strip the insulation off the batteries so they fit? Mike. Even after shrinking on , its very thin. Don't tell any mechanical engineer. A core of a choc-bloc, 10A?, is just right to join 3/32" shafts together. Luckily I save worn down "dremmel" grinding discs for when I need to cut the narrow edge of a slot in steel plate. So using one of them, a bit smaller than the bores of the GPS, did a great job of material removal to depth, not very pretty and probably not very concentric. Will tidy up with one of those sandpaper cylinder things hot melt glued o nthe end of a hotmelt glue stick , manually turning and sliding. |
#4
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Old Garmin handheld GPS, battery problem
Because of the off-axis coupler, I had to wrap 8 turns of 1mm copper
wire around non-protruding side of the couple, and grind the screws down to grub screws, to balance things up a bit |
#5
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Old Garmin handheld GPS, battery problem
On Mon, 25 Apr 2016, N_Cook wrote:
It seems the plastic housing has deformed to slightly oval tubes or something, but no rechargeable AA size batteries (2x2) comfortably slide in and out. Had to cut in from the side to make an access point to lever out the 2 deeper AAs, wedged in ther, no corrossion , just lack of freeboard. Any ideas how to enlarge the bores a bit, no engineering reamer available. Those silly sandpaper cylinders on a rubber cylinder "mandrel" for "Dremmels" would do the job if there was a way to extend the shaft. I'll try the core of a "choc block" connector as a coupler, but any other ideas? I'm not sure if it's "deformed". I have a Garmin, sort of slender and long, and I've had some trouble with rechargeables in there. The battery cover has a thing in the middle that you twist to lock it closed. That has been a tight fit. I seem to recall trying the thing with alkaline AAs, and it was easier to close that cover. Michael |
#6
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Old Garmin handheld GPS, battery problem
On 26/04/2016 00:26, Michael Black wrote:
On Mon, 25 Apr 2016, N_Cook wrote: It seems the plastic housing has deformed to slightly oval tubes or something, but no rechargeable AA size batteries (2x2) comfortably slide in and out. Had to cut in from the side to make an access point to lever out the 2 deeper AAs, wedged in ther, no corrossion , just lack of freeboard. Any ideas how to enlarge the bores a bit, no engineering reamer available. Those silly sandpaper cylinders on a rubber cylinder "mandrel" for "Dremmels" would do the job if there was a way to extend the shaft. I'll try the core of a "choc block" connector as a coupler, but any other ideas? I'm not sure if it's "deformed". I have a Garmin, sort of slender and long, and I've had some trouble with rechargeables in there. The battery cover has a thing in the middle that you twist to lock it closed. That has been a tight fit. I seem to recall trying the thing with alkaline AAs, and it was easier to close that cover. Michael The closers are Dzus Camlock. Perhaps deliberately undersized bores so as to lock you in to buying Garmin undersize AA batteries. If you are forcing home the closer , then you will have the same problem of the lower cells jammed in the bore. As the moulding around the bores is highly asymetric, perhaps the plastic releives over time and bends, anyway my "reaming" has done the trick, crude but effective, GPS still works BTW |
#7
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Old Garmin handheld GPS, battery problem
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#8
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Old Garmin handheld GPS, battery problem
On 26/04/2016 14:54, MJC wrote:
In article , says... anyway my "reaming" has done the trick, crude but effective, GPS still works BTW You're lucky! My admittedly old (1997) Garmin GPS-II+ screen became totally unreadable (though the rest of it worked) years ago. Mike. This is a GPS 12 |
#9
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Old Garmin handheld GPS, battery problem
N_Cook wrote:
On 26/04/2016 00:26, Michael Black wrote: On Mon, 25 Apr 2016, N_Cook wrote: It seems the plastic housing has deformed to slightly oval tubes or something, but no rechargeable AA size batteries (2x2) comfortably slide in and out. Had to cut in from the side to make an access point to lever out the 2 deeper AAs, wedged in ther, no corrossion , just lack of freeboard. Any ideas how to enlarge the bores a bit, no engineering reamer available. Those silly sandpaper cylinders on a rubber cylinder "mandrel" for "Dremmels" would do the job if there was a way to extend the shaft. I'll try the core of a "choc block" connector as a coupler, but any other ideas? I'm not sure if it's "deformed". I have a Garmin, sort of slender and long, and I've had some trouble with rechargeables in there. The battery cover has a thing in the middle that you twist to lock it closed. That has been a tight fit. I seem to recall trying the thing with alkaline AAs, and it was easier to close that cover. Michael The closers are Dzus Camlock. Perhaps deliberately undersized bores so as to lock you in to buying Garmin undersize AA batteries. If you are forcing home the closer , then you will have the same problem of the lower cells jammed in the bore. As the moulding around the bores is highly asymetric, perhaps the plastic releives over time and bends, anyway my "reaming" has done the trick, crude but effective, GPS still works BTW Are the origional batteries really undersized, or has the case just warped from heat? You could wrap the batteries with a few layers of paper, heat the case with an hot air gun, and insert the batteries to warp it back out. |
#10
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Old Garmin handheld GPS, battery problem
On 13/05/2016 18:23, Bob F wrote:
N_Cook wrote: On 26/04/2016 00:26, Michael Black wrote: On Mon, 25 Apr 2016, N_Cook wrote: It seems the plastic housing has deformed to slightly oval tubes or something, but no rechargeable AA size batteries (2x2) comfortably slide in and out. Had to cut in from the side to make an access point to lever out the 2 deeper AAs, wedged in ther, no corrossion , just lack of freeboard. Any ideas how to enlarge the bores a bit, no engineering reamer available. Those silly sandpaper cylinders on a rubber cylinder "mandrel" for "Dremmels" would do the job if there was a way to extend the shaft. I'll try the core of a "choc block" connector as a coupler, but any other ideas? I'm not sure if it's "deformed". I have a Garmin, sort of slender and long, and I've had some trouble with rechargeables in there. The battery cover has a thing in the middle that you twist to lock it closed. That has been a tight fit. I seem to recall trying the thing with alkaline AAs, and it was easier to close that cover. Michael The closers are Dzus Camlock. Perhaps deliberately undersized bores so as to lock you in to buying Garmin undersize AA batteries. If you are forcing home the closer , then you will have the same problem of the lower cells jammed in the bore. As the moulding around the bores is highly asymetric, perhaps the plastic releives over time and bends, anyway my "reaming" has done the trick, crude but effective, GPS still works BTW Are the origional batteries really undersized, or has the case just warped from heat? You could wrap the batteries with a few layers of paper, heat the case with an hot air gun, and insert the batteries to warp it back out. No real way of engineering-wise checking , but I suspect the tubes have gone banana shaped to some extent. Perhaps the plastic releives on one side, no tthe other, due to the asymetric structure of the case. Not kept in a hot place or sun though. |
#11
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Old Garmin handheld GPS, battery problem
On Monday, April 25, 2016 at 10:48:10 AM UTC-4, N_Cook wrote:
It seems the plastic housing has deformed to slightly oval tubes or something, but no rechargeable AA size batteries (2x2) comfortably slide in and out. Had to cut in from the side to make an access point to lever out the 2 deeper AAs, wedged in ther, no corrossion , just lack of freeboard. Any ideas how to enlarge the bores a bit, no engineering reamer available. Those silly sandpaper cylinders on a rubber cylinder "mandrel" for "Dremmels" would do the job if there was a way to extend the shaft. I'll try the core of a "choc block" connector as a coupler, but any other ideas? http://www.mcmaster.com/#grinding-bits/=12ed2ml such bits as metal grinding carbides are essential for rust maintenance. |
#12
Posted to sci.electronics.repair
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Old Garmin handheld GPS, battery problem
On Monday, April 25, 2016 at 10:48:10 AM UTC-4, N_Cook wrote:
It seems the plastic housing has deformed to slightly oval tubes or something, but no rechargeable AA size batteries (2x2) comfortably slide in and out. Had to cut in from the side to make an access point to lever out the 2 deeper AAs, wedged in ther, no corrossion , just lack of freeboard. Any ideas how to enlarge the bores a bit, no engineering reamer available. Those silly sandpaper cylinders on a rubber cylinder "mandrel" for "Dremmels" would do the job if there was a way to extend the shaft. I'll try the core of a "choc block" connector as a coupler, but any other ideas? http://www.allelectronics.com/make-a...holders/1.html |
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