Rocos ytterramade H0e-drivning - kort livslängd?
Postat: ons 17 sep 2008, 09:14
Enligt en diskussion i brittiska forumet [link=http://ngrm-online.com/forum/index.php]Narrow Gauge Railway Modelling Online[/link] uppstår snabbt axelglapp i drivningen på Rocos ytterramade H0e-lok.
Citat från diskussionen:
"The axles run in a die cast block and are held in place by a plastic keeper plate. Wear has taken place on both the steel axles, die cast block and keeper plate which causes side play. As this gets worse, the locos become more and more unstable and eventually progress in a similar manner to a very drunk seaman on his way back aboard."
"County Gate has a very long loop (44ft) and what with heavy grades and rolling stock, much is asked of them. Nevertheless, you folks should be aware of the difficulties I have experienced. The design has been deemed by a number of serious engineers to be one that will inevitably wear in this way."
"the drive wheel is held in place with a plastic keeper plate which gradually wears and the slot in the diecast just gets wider and wider."
"All three wheel sets are fitted the same way. Obviously the gear set which also takes the connecting rod has worn the most."
Skribenten använder inte Rocos originalkåpa - drivningarna är monterade i tyngre lok av vitmetall: "The loco was 50% heavier. The wear is side play, diameter of axles and also increasing width of the diecast slot. Once this happens with coupling rods the whole lot lot to hell in very short order. I do not consider weight the issue here but the intrinsic design of the chassis. There are no axle boxes and only point wear."
"All locos are run for 4 hours each way under load and are then stripped and checked for defects. Sadly, that seems to be not far short of the Roco chassis life as oscillations began about 2 hours operating later."
"The coupling, connecting rods and valve gear are much further out on this loco so the reciprocal forces are much greater than on an inside frame model. This is why, in my opinion, it is important to have excellent axles boxes and accurate gear.
I also note that there is a very rough spot on the motor. This is there even when removed from the chassis. The rough spot shows on all our Roco motors so it is not just a one off. Sadly, it is at an rpm that is around the speeds one likes to have to obtain slow movement."
Har själv ett sådant lok som jag (ännu) inte haft några problem med. Har i och för sig inte kört så mycket med det, men sammanlagt borde det vara mera än de ca 10 timmar som talas om i diskussionen ifråga.
Någon på detta forum som haft problem med Rocos ytterramade smalspårslok?
Citat från diskussionen:
"The axles run in a die cast block and are held in place by a plastic keeper plate. Wear has taken place on both the steel axles, die cast block and keeper plate which causes side play. As this gets worse, the locos become more and more unstable and eventually progress in a similar manner to a very drunk seaman on his way back aboard."
"County Gate has a very long loop (44ft) and what with heavy grades and rolling stock, much is asked of them. Nevertheless, you folks should be aware of the difficulties I have experienced. The design has been deemed by a number of serious engineers to be one that will inevitably wear in this way."
"the drive wheel is held in place with a plastic keeper plate which gradually wears and the slot in the diecast just gets wider and wider."
"All three wheel sets are fitted the same way. Obviously the gear set which also takes the connecting rod has worn the most."
Skribenten använder inte Rocos originalkåpa - drivningarna är monterade i tyngre lok av vitmetall: "The loco was 50% heavier. The wear is side play, diameter of axles and also increasing width of the diecast slot. Once this happens with coupling rods the whole lot lot to hell in very short order. I do not consider weight the issue here but the intrinsic design of the chassis. There are no axle boxes and only point wear."
"All locos are run for 4 hours each way under load and are then stripped and checked for defects. Sadly, that seems to be not far short of the Roco chassis life as oscillations began about 2 hours operating later."
"The coupling, connecting rods and valve gear are much further out on this loco so the reciprocal forces are much greater than on an inside frame model. This is why, in my opinion, it is important to have excellent axles boxes and accurate gear.
I also note that there is a very rough spot on the motor. This is there even when removed from the chassis. The rough spot shows on all our Roco motors so it is not just a one off. Sadly, it is at an rpm that is around the speeds one likes to have to obtain slow movement."
Har själv ett sådant lok som jag (ännu) inte haft några problem med. Har i och för sig inte kört så mycket med det, men sammanlagt borde det vara mera än de ca 10 timmar som talas om i diskussionen ifråga.
Någon på detta forum som haft problem med Rocos ytterramade smalspårslok?