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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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Troubleshooting treadmill motor help
I have a Weslo 815 treadmill I am trying to find out why it bogs down
once I step on the tread belt...any suggestions welcome. I got this used and want to fix it up. Here is what I know. With the aid of my multimeter and the troublshooting instructions inside my treadmill I find. 1. Motor DC 90 volt powered via motor contol board. I cleaned the brushes and the armature with 1500 grit sandpaper to smooth them up, they were arcing, now work fine. Tested continuity all round the motor, looks fine. Tested resistance all round the motor, about 3.5 ohms avg. Cleaned any grease off belt pulley. No way to lube bearings but motor shaft turns ok. Can run it to top speed without me on it but bogs way down when I get on. Belt adjusted and no slipping noticed. Motor does not overheat.. 2. Controller board. All tests done on it show the motor is getting volts and amps per the specs except the sliding speed control specs say it should rise up to about 5k at max mine shows up to about 9k ohms. At about medium speed the amps are about 1.5 amps without me on it, when I get on it the amps raise to about 2.75 amps as it slows down... Once is slows down it never recovers to the proper speed... At maximum speed it is getting about 2.5 amps which specs say is correct.... So at this point I am thinking maybe the motor is going bad... It is about 8 years old and really too small for this application... Any other tests I can do? Thanks Rob |
#2
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Troubleshooting treadmill motor help
Hi
I have a Weslo 835 which has problems, could you tell me where you got the service manual for it, as I need one to fix mine. "ROBMURR" wrote in message ... I have a Weslo 815 treadmill I am trying to find out why it bogs down once I step on the tread belt...any suggestions welcome. I got this used and want to fix it up. Here is what I know. With the aid of my multimeter and the troublshooting instructions inside my treadmill I find. 1. Motor DC 90 volt powered via motor contol board. I cleaned the brushes and the armature with 1500 grit sandpaper to smooth them up, they were arcing, now work fine. Tested continuity all round the motor, looks fine. Tested resistance all round the motor, about 3.5 ohms avg. Cleaned any grease off belt pulley. No way to lube bearings but motor shaft turns ok. Can run it to top speed without me on it but bogs way down when I get on. Belt adjusted and no slipping noticed. Motor does not overheat.. 2. Controller board. All tests done on it show the motor is getting volts and amps per the specs except the sliding speed control specs say it should rise up to about 5k at max mine shows up to about 9k ohms. At about medium speed the amps are about 1.5 amps without me on it, when I get on it the amps raise to about 2.75 amps as it slows down... Once is slows down it never recovers to the proper speed... At maximum speed it is getting about 2.5 amps which specs say is correct.... So at this point I am thinking maybe the motor is going bad... It is about 8 years old and really too small for this application... Any other tests I can do? Thanks Rob |
#3
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Troubleshooting treadmill motor help
"Bodgey" wrote in message ... Hi I have a Weslo 835 which has problems, could you tell me where you got the service manual for it, as I need one to fix mine. "ROBMURR" wrote in message ... I have a Weslo 815 treadmill I am trying to find out why it bogs down once I step on the tread belt...any suggestions welcome. I got this used and want to fix it up. Here is what I know. With the aid of my multimeter and the troublshooting instructions inside my treadmill I find. 1. Motor DC 90 volt powered via motor contol board. I cleaned the brushes and the armature with 1500 grit sandpaper to smooth them up, they were arcing, now work fine. Tested continuity all round the motor, looks fine. Tested resistance all round the motor, about 3.5 ohms avg. Cleaned any grease off belt pulley. No way to lube bearings but motor shaft turns ok. Can run it to top speed without me on it but bogs way down when I get on. Belt adjusted and no slipping noticed. Motor does not overheat.. 2. Controller board. All tests done on it show the motor is getting volts and amps per the specs except the sliding speed control specs say it should rise up to about 5k at max mine shows up to about 9k ohms. At about medium speed the amps are about 1.5 amps without me on it, when I get on it the amps raise to about 2.75 amps as it slows down... Once is slows down it never recovers to the proper speed... At maximum speed it is getting about 2.5 amps which specs say is correct.... So at this point I am thinking maybe the motor is going bad... It is about 8 years old and really too small for this application... Any other tests I can do? Thanks Rob Sure sounds like belt slip somewhere to me !! -- Regards ............... Rheilly Phoull |
#4
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Troubleshooting treadmill motor help
or he weighs to much.... lol. j/k
"Rheilly Phoull" wrote in message u... "Bodgey" wrote in message ... Hi I have a Weslo 835 which has problems, could you tell me where you got the service manual for it, as I need one to fix mine. "ROBMURR" wrote in message ... I have a Weslo 815 treadmill I am trying to find out why it bogs down once I step on the tread belt...any suggestions welcome. I got this used and want to fix it up. Here is what I know. With the aid of my multimeter and the troublshooting instructions inside my treadmill I find. 1. Motor DC 90 volt powered via motor contol board. I cleaned the brushes and the armature with 1500 grit sandpaper to smooth them up, they were arcing, now work fine. Tested continuity all round the motor, looks fine. Tested resistance all round the motor, about 3.5 ohms avg. Cleaned any grease off belt pulley. No way to lube bearings but motor shaft turns ok. Can run it to top speed without me on it but bogs way down when I get on. Belt adjusted and no slipping noticed. Motor does not overheat.. 2. Controller board. All tests done on it show the motor is getting volts and amps per the specs except the sliding speed control specs say it should rise up to about 5k at max mine shows up to about 9k ohms. At about medium speed the amps are about 1.5 amps without me on it, when I get on it the amps raise to about 2.75 amps as it slows down... Once is slows down it never recovers to the proper speed... At maximum speed it is getting about 2.5 amps which specs say is correct.... So at this point I am thinking maybe the motor is going bad... It is about 8 years old and really too small for this application... Any other tests I can do? Thanks Rob Sure sounds like belt slip somewhere to me !! -- Regards ............... Rheilly Phoull |
#5
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Troubleshooting treadmill motor help
I have a Weslo 835 which has problems, could you tell me where you got the
service manual for it, as I need one to fix mine. Mine has troubleshooting instructions inside the area that holds the motor and electronics pasted inside. Hope that helps. |
#7
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Troubleshooting treadmill motor help
It is the armature current that flows through the brushes and the
commutator. Many DC motors have a motor field winding that is isolated from the armature. This motor requires a current to flow through the field winding. If no current, or too little current flows through the field, the motor torque will be greatly reduced, as yours is. Some DC motors have the field winding wired internally in series with the armature. If not, and the controller also has a separate motor field current source built into it, it could be the problem. Some DC motors have permanent magnets and do not have a field winding and so don't require field current. You said the motor does not overheat, so that indicates that it is not a loading problem. I guess we need to know more about your motor and controller to troubleshoot this further. "ROBMURR" wrote in message ... I have a Weslo 815 treadmill I am trying to find out why it bogs down once I step on the tread belt...any suggestions welcome. I got this used and want to fix it up. Here is what I know. With the aid of my multimeter and the troublshooting instructions inside my treadmill I find. 1. Motor DC 90 volt powered via motor contol board. I cleaned the brushes and the armature with 1500 grit sandpaper to smooth them up, they were arcing, now work fine. Tested continuity all round the motor, looks fine. Tested resistance all round the motor, about 3.5 ohms avg. Cleaned any grease off belt pulley. No way to lube bearings but motor shaft turns ok. Can run it to top speed without me on it but bogs way down when I get on. Belt adjusted and no slipping noticed. Motor does not overheat.. 2. Controller board. All tests done on it show the motor is getting volts and amps per the specs except the sliding speed control specs say it should rise up to about 5k at max mine shows up to about 9k ohms. At about medium speed the amps are about 1.5 amps without me on it, when I get on it the amps raise to about 2.75 amps as it slows down... Once is slows down it never recovers to the proper speed... At maximum speed it is getting about 2.5 amps which specs say is correct.... So at this point I am thinking maybe the motor is going bad... It is about 8 years old and really too small for this application... Any other tests I can do? Thanks Rob |
#8
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Troubleshooting treadmill motor help
It is the armature current that flows through the brushes and the
commutator. Many DC motors have a motor field winding that is isolated from the armature. This motor requires a current to flow through the field winding. If no current, or too little current flows through the field, the motor torque will be greatly reduced, as yours is. Some DC motors have the field winding wired internally in series with the armature. If not, and the controller also has a separate motor field current source built into it, it could be the problem. Some DC motors have permanent magnets and do not have a field winding and so don't require field current. You said the motor does not overheat, so that indicates that it is not a loading problem. I guess we need to know more about your motor and controller to troubleshoot this Thanks for the help. It is a permanent magnet motor. I see no slipping of the drive belt and the tread belt surface that it runs on is clean and quite slick...It just feels like it is a tired motor...I will verify if the belt is slipping with some chalk on the belt and pulley may show something. Oh yeah I am only 175 lbs heavy! Rob |
#9
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Troubleshooting treadmill motor help
An update by the original poster...
I went to Sears to try a similar new treadmill to see the difference..one thing was that the track part slid effortlessly... you could nearly walk on it without turning on the motor...mine is no where near that smooth! So I suspect a track/roller problem and I am sure it needs some lube on the deck too. Troubleshooting the motor and controller board show no problems...I have sent an email to the maker for their advice. Thanks All. Rob |
#10
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Troubleshooting treadmill motor help
I would try the deck lube, if I remember correctly my dad got his at
sears, the deck lube somewhere else but the treadmill was from sears. On 26 Dec 2003 23:34:32 GMT, (ROBMURR) wrote: An update by the original poster... I went to Sears to try a similar new treadmill to see the difference..one thing was that the track part slid effortlessly... you could nearly walk on it without turning on the motor...mine is no where near that smooth! So I suspect a track/roller problem and I am sure it needs some lube on the deck too. Troubleshooting the motor and controller board show no problems...I have sent an email to the maker for their advice. Thanks All. Rob REMOVE the NOCRAP in my address to reply. |
#11
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Troubleshooting treadmill motor help Fixed.
Well I determined thru testing that it looked like the controller and motor
were doing their job so I looked to the belt and deck for some friction problems...Well someone had slopped on some kind of wax that once warm would start to stick! It held dirt too and dirt/wax was stuck to the back of the belt also! So I tore it all down and tried to remove the wax..I used a heat gun,putty knife, citrus cleaner, wire brush, 409, carb cleaner, castrol super cleaner and 1500 grit sand paper! nothing worked. Tried a product called Greased Lightning and a scrub pad and it came right off! Took the belt to the car wash and used the greased lightning on it and hot high pressure water and it cleaned up nicely. Now I have taken the clean deck board and used some 1500 grit sandpaper to smooth it and then used some Pledge furniture wax with an orbital buffer for a super slick board and it works as well as it ever did now! I also lubed the rollers but they were pretty smooth any way. I also used some automotive belt dressing on the drive belt, it wont slip with that stuff on there. Thanks for the replys. |
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