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Archive of the technobots.co.uk support forum

This copy of our old forum that closed to new posts in 2010. It is a 'work in progress' as we copy the pages across. The posts still provide a valuable source of information for both our customers and general info to the casual reader arriving here from search engines.

Archive through September 4, 2006

Author Message
steven kemp
Unregistered guest
Posted on Monday, March 27, 2006 - 10:04 am:    Edit Post    Move Post (Moderator/Admin Only)

please can you tell me if you have or can get a motor 41tyz-b synchronous motor 12 volt 50/60hz 1/2w 5r/min cw/ccv many thanks
steve
Admin (Admin)
Board Administrator
Username: Admin

Post Number: 152
Registered: 10-2004
Posted on Tuesday, March 28, 2006 - 10:11 pm:    Edit Post    Move Post (Moderator/Admin Only)

Steve,

We do not supply any AC motors, our range is currently limited to DC motors only. Sorry we cannot help.
ADEL FARHAN
Unregistered guest
Posted on Friday, April 14, 2006 - 12:09 pm:    Edit Post    Move Post (Moderator/Admin Only)

HI I AM LOOKING FOR A MOTOR TO DRIVE A PRE OILING PUMP FOR AIRCRAFT PISTON ENGINE, THE PUMP WILL BE RUN @320RPM AND REQUIRES 0.36KW, THE PUMP HAS IEC90 Frame B3/B5 flanged. THE PUMP SHAFT DIAMETER IS 24MM. THE MOTOR WILL BE POWER SUPPLIED BY THE AIRCRAFT BATTERY 240V. WOULD U PLEASE HELP ME FINDING THE RIGHT MOTOR. I HOPE TO HERE FROM U SOON AS THIS IS VERY IMPORTANT TO ME. THANK U FOR UR HELP.
BEST REGARDS
ADEL
Admin (Admin)
Board Administrator
Username: Admin

Post Number: 170
Registered: 10-2004
Posted on Wednesday, April 19, 2006 - 6:56 pm:    Edit Post    Move Post (Moderator/Admin Only)

Adel,

Sorry but our motor range is limited to 36Vdc and we do not attempt to compete in the industrial motor market. The motor you describe appears to be a geared motor and would be very specialised.

Once again, sorry but we cannot help.
D Nuttall
Unregistered guest
Posted on Thursday, May 4, 2006 - 8:04 pm:    Edit Post    Move Post (Moderator/Admin Only)

Hi, My quest is to find a Permanent magnet motor ie: brushless, reverse it's intended design purpose and put it to use as a generator on a wind turbine. My blades are 1 mtr dia. but can be changed to suit the correct motor/PMG. Any suggestions please?
Dave.
Admin (Admin)
Board Administrator
Username: Admin

Post Number: 179
Registered: 10-2004
Posted on Saturday, May 6, 2006 - 11:58 am:    Edit Post    Move Post (Moderator/Admin Only)

Dave,

This is a topic where our knowledge is very limited. Firstly we do not stock any brushless motors at the time of writing, Our Power Drive motor is certainly used for wind generators and has an efficiency of typically 85% but has brushes and a high rpm requirement.

Sorry we cannot be of more help.
Phillip Lewis
Unregistered guest
Posted on Wednesday, May 24, 2006 - 5:56 pm:    Edit Post    Move Post (Moderator/Admin Only)

I want to make a gear system that runs from a 6 to 12 volt batery for movement of C.C.T.V. cameras. I only need the motor and gear system capable of slowing the movement down. Is there any advice you can give of your products that can do the job. Many thanks
Admin (Admin)
Board Administrator
Username: Admin

Post Number: 194
Registered: 10-2004
Posted on Wednesday, May 24, 2006 - 8:13 pm:    Edit Post    Move Post (Moderator/Admin Only)

Phillip

We stock a wide range of geared motors down to just a few rpm. You would need to specify the speed of rotation and some idea of camera weight would be useful as well. There is likely to be a geared motor in our range that would suit.
Admin (Admin)
Board Administrator
Username: Admin

Post Number: 196
Registered: 10-2004
Posted on Tuesday, May 30, 2006 - 8:56 pm:    Edit Post    Move Post (Moderator/Admin Only)

Thank you Paul for your Email. The cameras I am using are as the picture and are about half a pound in weight and need to be slowed down to around 10 to 20 RPM but I do have a speed controller that will slow a 9 to 12V motor down. We have made the direction electronic system for reversing the cameras but need to be able to control the speed as previously said.

Many Thanks

Kind Regards

Phillip
Admin (Admin)
Board Administrator
Username: Admin

Post Number: 197
Registered: 10-2004
Posted on Tuesday, May 30, 2006 - 9:05 pm:    Edit Post    Move Post (Moderator/Admin Only)

Phillip,

If we assume 20 rpm at 12V requirement, our 1450-055 will be suitable and drops to 10 rpm at 6V. Alternatives are the planetry geared motor 1450-082 which has a speed range of 13 to 27rpm over the 6-12V. Both of these motors will easily turn your camera, in fact you will get away with a smaller motor such as the 1450-105 giving 7-15rpm over 6-12V or the planetry 1450-062 giving 8.5-19rpm over the 6-12V.

Hope that helps

Paul
David Jaquin
Unregistered guest
Posted on Monday, July 10, 2006 - 6:12 pm:    Edit Post    Move Post (Moderator/Admin Only)

hi, im looking to source a low voltage motor that will work (possibly geared) at low speed. The puspose being to rotate a large perspex disc mounted vertically on a stand.
The base is currently 35mm deep and the motor and any gearing needs to be accomodated in this depth.
RPM needs to be between 10-15.
Hope somebody could help
Admin (Admin)
Board Administrator
Username: Admin

Post Number: 236
Registered: 10-2004
Posted on Monday, July 10, 2006 - 9:17 pm:    Edit Post    Move Post (Moderator/Admin Only)

David,

Sorry but we do not have any motors that will fit in such a small space. It would need to be a geared motor (although other motor technologies may be available) to get the rpm down. We do have a 90 Deg bevel gearbox that is also just too large. You did not say how heavy the disc was but if it is relatively light, you could use our plastic worm drive set with a geared motor such as our 15:1 RE280 1450-030.
wayne
Unregistered guest
Posted on Sunday, August 20, 2006 - 1:21 pm:    Edit Post    Move Post (Moderator/Admin Only)

hi i was wondering if you can help, me im building a wheelchair but i dont no what motors i need. Could you tell me what motors i would need i want it to go slow, e.g. the same as a bacis electric wheelchair would go.
Admin (Admin)
Board Administrator
Username: Admin

Post Number: 254
Registered: 10-2004
Posted on Monday, August 21, 2006 - 8:27 pm:    Edit Post    Move Post (Moderator/Admin Only)

Hello Wayne,

The best we can recommend here is to obtain some scrap wheelchair motors or even to obtain a whole scrap electric wheelchair and use its speed controller as well. We do not currently have any wheelchair motors in our range but those commercially available would typically cost £80 to £150 each. Ebay does have scrap electric wheelchair motors from time to time so worth doing a search there.
Dpbarry (Dpbarry)
Member
Username: Dpbarry

Post Number: 1
Registered: 8-2006
Posted on Thursday, August 24, 2006 - 9:34 pm:    Edit Post    Move Post (Moderator/Admin Only)

Hi..

I'm in the process of gathering together the bits and pieces to build a Radio Controlled 12th scale model of an RNLI Mersey Class Lifeboat. I also intend to build a 12th scale version of the RNLI Talus tractor which pull/pushes this lifboat on its carriage (http://www.btinternet.com/~m.fish/vehicles/lythamtr.htm)

My query is on the motor/gearbox setup for the tractor. The real thing does 11mph.

From speaking to others who have built just the Lifeboat, the lifeboat weighs around 25kg thus I'm trying to work out what sort of motor/gearbox setup to use.

I have also obtained plans for transmission setups at http://www.rctransmission.com/CT.htm

I'd be grateful for any advice you could offer.

Many thanks

Declan Barry
Former Mersey Lifeboat Crew
Admin (Admin)
Board Administrator
Username: Admin

Post Number: 258
Registered: 10-2004
Posted on Thursday, August 31, 2006 - 6:58 am:    Edit Post    Move Post (Moderator/Admin Only)

Declan,

Sorry for the delay in replying, we have been rather tied up with our move to new premises.

You did not say what speed you require your scale model to travel at or what weight the tractor would be. After making a few estimations, I feel our range of geared motors would most likely be under-powered for you. We do have a motor that would work rather well which is our Feather Gold 1410-010 or -011 for the 12V version. You will need to build gearboxes for which I would suggest our range of MOD 1 steel gears. Without knowing the speed and wheel diameter, I cannot advise a ratio now.

Hopefully that is some help.
Declan Barry (Dpbarry)
Member
Username: Dpbarry

Post Number: 2
Registered: 8-2006
Posted on Friday, September 1, 2006 - 4:33 pm:    Edit Post    Move Post (Moderator/Admin Only)

Hi Admin..

Good luck with the new move.

Sorry, I made a big blooping mistake on the weight. It should have been Lbs NOT Kgs.

Sorry about that!!

therefore In relation to the Lifeboat and carriage unit combined, the weight should be working in at around 30-35Lbs. The tractor would need to have a motor/gearbox setup to enable it to pull itself and the lifeboat/carriage setup along a flat surface and up a gradient.

The real tractor has a maximum speed of 11MPH so at a 12th scale would the max speed work out at just under 1 MPH. I'm not worried about top end speed as realistically it wouldn't be doing that but I am concerned about torque in order for the tractor unit to be able to pull itself and the combined Lifeboat/carriage up an incline as if the lifeboat was being returned to the lifeboat station. I would say an incline of around 20 degrees. I'm not very good with the mathematical side of things in terms of matching max revs of motor to final drive of gearbox.

I've spoken with the guy from www.rctransmission.com who will help me with final ratios if I can give him the details on the motor(s) I intend to use and this is where I am hoping you can help based on your knowledge of robotics.

Many thanks for replying. Excellent site. All I need under one 'roof'

Declan
Admin (Admin)
Board Administrator
Username: Admin

Post Number: 263
Registered: 10-2004
Posted on Friday, September 1, 2006 - 7:32 pm:    Edit Post    Move Post (Moderator/Admin Only)

Hi Declan

Right, that makes the weight about 16kg. We have an on-line calculator which you can find here http://www.technobots.co.uk/Technical/Calculators/Speed%20calc/Speed%20calc.htm that will allow you to calculate ratios and speeds.

Are you fixed to having a gearbox from RC transmissions or could you use a self contained geared motor. For example, our 942D Planetry Geared Motor on 100:1 would give 1.7mph on 12V with 100mm diameter wheels. Each motor would give some 15kg/cm of torque which I feel would be okay for your application.

An uprated version could be made using our RE800 or even 850 motors. The RE 800 with a 31:1 (from RC Transmissions?) gearbox should give a torque of 152kg/cm based on the same requirements.

So, if you have the room, try the RE 800 (1401-022) or perhaps one of our geared smaller motors.

BTW, thank you for the compliments, always appreciated.

Regards

Paul
Declan Barry (Dpbarry)
Member
Username: Dpbarry

Post Number: 3
Registered: 8-2006
Posted on Sunday, September 3, 2006 - 3:26 pm:    Edit Post    Move Post (Moderator/Admin Only)

Hi Paul..

I'm not really fixed to a gearbox from rctransmissions. It was just that it was all I could find at the time that looked to be what I was after - before I found your site!!

I'll have a look at all the dimensions to see what I can fit where. It would save me a lot of machining (although that was part of the attraction).

Is there a typo in your reply? 15kg/cm using the 942D motor - 152kg/cm using the RE800/RE850 motor.

Regards

Declan
Admin (Admin)
Board Administrator
Username: Admin

Post Number: 265
Registered: 10-2004
Posted on Monday, September 4, 2006 - 9:25 pm:    Edit Post    Move Post (Moderator/Admin Only)

Declan,

I though it was rather high, that will teach me to rush the calcs. The 800 motor has a torque of 82mN/m x 31 = 2.54N/m which converts to 25.9 kg/cm. The 850 has a torque of 92mN/m but is higher reving so you would need a gearbox of 57:1 giving a final torque of 92mN/m x 57 = 5.24N/m which converts to 53kg/cm.

Apologies for the error, hopefully I have got it right now. This should give you some idea of the comparitive torques.

Regards

Paul

 

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