开云体育

Bowser DC-71 new motor noise

Fred Hanes All Messages By This Member #4271 Hi group, I'm building a bowser HO steam loco I got on EBAY and I've just tried out the DC-71 motor.? It makes a lot of noise that seems to come from the brushes. When I pinch back on the brush spring to ease off the pressure, there is less noise.? Is a break-in period normal and how much will that fix the noise? I also see some rust on the motor poles.? Might that cause some imbalance and make noise?? What's a good way to clean off the rust? I cleaned off the commutator so it is bright and shiny.?? I gave the bearings a little oil. Any tips? Thanks.? Fred,
Henry Hultgren All Messages By This Member #4272 Hi Fred , oil the bearings , be stingy with it tho' . DC71 motors are noisy unlike today's can motors .However , you will NEVER bog down one of these in a good rolling Bowser loco . They lug really well .? Henry H. moderator , welcome .
Doug Kisala All Messages By This Member #4274 Fred, list, DC71 motors in a good state of tune (broken in and lubricated) are pretty quiet when run by themselves.? Once in the Bowser models, there's some gear and chassis noise.?? A bright boy (or equivalent product) can remove light rust/tarnish.? Without seeing a picture of your motor, I don't think the rust is the cause of the noise...you'd have to have a great deal of rust for that to happen. Before you change anything (like brush tension), can you figure out how much current the motor is drawing?? An older DC71 would draw about 1 amp at 12 volts once broken in.? If you're over 1 amp and the motor is noisy, you might have too much brush tension.? I have a power pack with meters specifically so I can break in and/or diagnose balky engines.?? I usually break in the motor with the model....running an assembled chassis for about an hour in each direction at varying speeds with frequent stops and starts helps break in a new motor and highlights any remaining issues with your chassis assembly. Doug On Saturday, March 10, 2018, 8:29:37 PM PST, fred_hanes@... [yardbirdtrains] wrote: Hi group, I'm building a bowser HO steam loco I got on EBAY and I've just tried out the DC-71 motor.? It makes a lot of noise that seems to come from the brushes. When I pinch back on the brush spring to ease off the pressure, there is less noise.? Is a break-in period normal and how much will that fix the noise? I also see some rust on the motor poles.? Might that cause some imbalance and make noise?? What's a good way to clean off the rust? I cleaned off the commutator so it is bright and shiny.?? I gave the bearings a little oil. Any tips? Thanks.? Fred, (snip) _
Fred Hanes All Messages By This Member #4276 Hi Group thanks for all the great tips. The Bowser motor by itself now runs pretty quiet. With the motor attached to the chassis and the basic drive train assembled, I get noise going forward but almost silence in reverse. I've tried shim washers under the motor to change the gear mesh but no big changes in noise.? Should I try washers under both the front and rear motor mounting points at the same time? Maybe noise is coming from the axles turning in the bearings?? I see some play when the wheels are turning. I wish I had a nice power supply setup with a current meter, maybe down the road.? For now I'd be happy to tune the motor by ear so that the noise forward equals the noise in reverse, Any tips?
Fred Hanes All Messages By This Member #4275 Hi Doug and group, Thanks so much for the tips. The Bowser motor is running pretty quiet by itself now. When the motor is attached to the chassis with the basic drive train of side rods, main rods, and crossheads installed, I get a lot more noise going forwards than backwards.?? Reverse is almost silent.? How I wish I could get less noise going forward. I've tried shim washers under the motor to change the gear mesh but I don't seem to make a difference so far. Should I keep fiddling with shims?? Maybe at both the front and back mounting points at the same time? Any further thoughts on more noise going forward vs reverse? I wish I had a nice power station with volt and amp meters to really see the current load for fine tuning.? But I can hear something seems wrong and hope that I can use my ears to tune up the system. Thanks in advance! Fred
George Galyon All Messages By This Member #4282 Sometimes nothing works but on my bowsers I like taking the slack out of the armature shaft with Neal thrust washers. This involves removing the armature. Don’t worry about it. ?I never noticed any performance degradation when reassembled and I’m not the only one with the same experience. I suspect that the bowser magnets are sintered alnico?magnets with better retentiiveness than the older cast alnicos from back in the day. If u make the slack too tight you’ll get a high pitch whine. ?Try for a less than 1 mil slack and then adjust the worm to worm gear spacing. Good luck.? Sent from AOL Mobile Mail On?Monday, March 19, 2018,?fred_hanes@... [yardbirdtrains]?<yardbirdtrains@...>?wrote: toggle quoted message Show quoted text ? Hi Group thanks for all the eeegreat tips. The Bowser motor by itself now runs pretty quiet. With the motor attached to the chassis and the basic drive train assembled, I get noise going forward but almost silence in reverse. I've tried shim washers under the motor to change the gear mesh but no big changes in noise.? Should I try washers under both the front and rear motor mounting points at the same time? Maybe noise is coming from the axles turning in the bearings?? I see some play when the wheels are turning. I wish I had a nice power supply setup with a current meter, maybe down the road.? For now I'd be happy to tune the motor by ear so that the noise forward equals the noise in reverse, Any tips?
Victor Bitleris All Messages By This Member #4281 开云体育 I suspect that the armature has play.? When in reverse, it is pushed toward the magnet and all play is gone.? When in forward, I bet the armature goes back and forth.? If that is the case, you may be be able to use the Kadee fiber washers to shim it. This is a pretty common occurrence in Mantua motors as well. Vic Bitleris Raleigh, NC From: yardbirdtrains@... on behalf of fred_hanes@... [yardbirdtrains] Sent: Monday, March 19, 2018 12:32 AM To: yardbirdtrains@... Subject: Re: [yardbirdtrains] Bowser DC-71 new motor noise ? ? Hi Group thanks for all the great tips. The Bowser motor by itself now runs pretty quiet. With the motor attached to the chassis and the basic drive train assembled, I get noise going forward but almost silence in reverse. I've tried shim washers under the motor to change the gear mesh but no big changes in noise.? Should I try washers under both the front and rear motor mounting points at the same time? Maybe noise is coming from the axles turning in the bearings?? I see some play when the wheels are turning. I wish I had a nice power supply setup with a current meter, maybe down the road.? For now I'd be happy to tune the motor by ear so that the noise forward equals the noise in reverse, Any tips?
Fred Hanes All Messages By This Member #4285 Hi Vic, great suggestion.??? I agree there seems to be some play in the armature.?? ?To get the washers onto?the motor shaft ?I believe ?I must take the motor apart, which I have never done before.? I have a number of similar motors in other locos and I'm excited by the prospects for improving them too. I've done a web search for this process but haven't found much. I think I will need to un-solder the worm from the shaft, then unscrew the top and bottom motor plates to release the armature? Is there a risk of losing power from the magnet if the motor is opened up like this ?? Any tips for handling the magnet? The motor is a straight-pole Bowser design, not the newer skewed pole, so I assume it has an Alnico magnet? Thanks.. Fred Hanes, San Jose, CA On Tuesday, March 20, 2018 7:59 AM, "Victor Bitleris bitlerisvj@... [yardbirdtrains]" wrote: ? I suspect that the armature has play.? When in reverse, it is pushed toward the magnet and all play is gone.? When in forward, I bet the armature goes back and forth.? If that is the case, you may be be able to use the Kadee fiber washers to shim it. This is a pretty common occurrence in Mantua motors as well. Vic Bitleris Raleigh, NC toggle quoted message Show quoted text From: yardbirdtrains@... on behalf of fred_hanes@... [yardbirdtrains] Sent: Monday, March 19, 2018 12:32 AM To: yardbirdtrains@... Subject: Re: [yardbirdtrains] Bowser DC-71 new motor noise ? ? Hi Group thanks for all the great tips. The Bowser motor by itself now runs pretty quiet.. With the motor attached to the chassis and the basic drive train assembled, I get noise going forward but almost silence in reverse. I've tried shim washers under the motor to change the gear mesh but no big changes in noise.? Should I try washers under both the front and rear motor mounting points at the same time? Maybe noise is coming from the axles turning in the bearings?? I see some play when the wheels are turning. I wish I had a nice power supply setup with a current meter, maybe down the road.? For now I'd be happy to tune the motor by ear so that the noise forward equals the noise in reverse, Any tips?
Henry Hultgren All Messages By This Member #4283 Thanks for jogging my memory Vic , once you shim these motors they run nicely . I you oil those bearings be stingy with it , i learned that one the hard way . Messy !!? Henry
Fred Hanes All Messages By This Member #4286 开云体育 So to remove the armature I need to remove the worm. ?Any tips other than buying a gear puller tool? Fred? toggle quoted message Show quoted text On Mar 21, 2018, at 10:27 AM, huligin62@... [yardbirdtrains] <yardbirdtrains@...> wrote: ? Thanks for jogging my memory Vic , once you shim these motors they run nicely . I you oil those bearings be stingy with it , i learned that one the hard way . Messy !!? Henry
Victor Bitleris All Messages By This Member #4287 开云体育 Hi Fred, What you may wish to try first is to use Kadee fiber washers, which come in several different thicknesses.? You can try to use a feeler gauge to see what thickness would take up the slop and the use appropriate thickness fiber washers.? You can cut a pie section out of the washers and force them onto the shaft at the back end of the armature.? If needed, you can use super glue to keep them there. Depending on the motor, you may be able to take apart the magnet end and put washers directly on the shaft.? But, taking out the magnet could cause it to get weak.? If you want to try that, I suggest getting some neodymium magnets to replace the magnet.? I have never heard of neodymium magnets losing power when removed from the motor.? The ONLY reason I would remove the gear is if I would want to replace the motor with a can motor, but then you would likely need a sleeve for the new smaller motor shaft. Vic Bitleris Raleigh, NC toggle quoted message Show quoted text From: yardbirdtrains@... on behalf of fred hanes fred_hanes@... [yardbirdtrains] Sent: Wednesday, March 21, 2018 1:10 PM To: yardbirdtrains@... Subject: Re: [yardbirdtrains] Bowser DC-71 new motor noise ? ? Hi Vic, great suggestion.??? I agree there seems to be some play in the armature.?? ?To get the washers onto?the motor shaft ?I believe ?I must take the motor apart, which I have never done before.? I have a number of similar motors in other locos and I'm excited by the prospects for improving them too. I've done a web search for this process but haven't found much. I think I will need to un-solder the worm from the shaft, then unscrew the top and bottom motor plates to release the armature? Is there a risk of losing power from the magnet if the motor is opened up like this ?? Any tips for handling the magnet? The motor is a straight-pole Bowser design, not the newer skewed pole, so I assume it has an Alnico magnet? Thanks.. Fred Hanes, San Jose, CA On Tuesday, March 20, 2018 7:59 AM, "Victor Bitleris bitlerisvj@... [yardbirdtrains]" wrote: ? I suspect that the armature has play.? When in reverse, it is pushed toward the magnet and all play is gone.? When in forward, I bet the armature goes back and forth.? If that is the case, you may be be able to use the Kadee fiber washers to shim it. This is a pretty common occurrence in Mantua motors as well. Vic Bitleris Raleigh, NC From: yardbirdtrains@... on behalf of fred_hanes@... [yardbirdtrains] <yardbirdtrains@...> Sent: Monday, March 19, 2018 12:32 AM To: yardbirdtrains@... Subject: Re: [yardbirdtrains] Bowser DC-71 new motor noise ? ? Hi Group thanks for all the great tips. The Bowser motor by itself now runs pretty quiet.. With the motor attached to the chassis and the basic drive train assembled, I get noise going forward but almost silence in reverse. I've tried shim washers under the motor to change the gear mesh but no big changes in noise.? Should I try washers under both the front and rear motor mounting points at the same time? Maybe noise is coming from the axles turning in the bearings?? I see some play when the wheels are turning. I wish I had a nice power supply setup with a current meter, maybe down the road.? For now I'd be happy to tune the motor by ear so that the noise forward equals the noise in reverse, Any tips?

Previous Topic Next Topic