| Author |
Message |
Admin (Admin)
Board Administrator
Username: Admin
Post Number: 737
Registered: 10-2004
|
| Posted on Saturday, March 15, 2008 - 8:01 pm: |
  |
Hi,
Assuming you wish to power both motors from a single controller then a 4QD Vortex-75 36V 75A - Part No: 1511-025 (also available boxed) will just about be okay although we do have customers who prefer to over-size the controller to be on the safe side by using a 4QD PRO 36V 120A - Part No: 1512-003. We also have customers who run the motors from two individual controllers and synchronise them where two engines are 'double headed'.
Regards
Paul |
charles pearce
Unregistered guest
|
| Posted on Tuesday, May 13, 2008 - 9:19 am: |
|
i am looking for a speed controller for a radio contol truck. this is powered by a 12 volt golf kart motor i dont know what the wattage is but it must be about 100w |
Admin (Admin)
Board Administrator
Username: Admin
Post Number: 788
Registered: 10-2004
|
| Posted on Thursday, May 15, 2008 - 6:57 am: |
|
Charles,
If it is only 100W, then a 10A controller upwards should be fine. I assume you only need a single channel so check out the following products on our website: 1500-008 or 1500-009, 1506-001. There are larger current versions as well but these should work just fine. |
Martin flint (Martinmadeit)
Member
Username: Martinmadeit
Post Number: 1
Registered: 6-2008
|
| Posted on Tuesday, June 10, 2008 - 8:55 pm: |
|
Hello,
I am in the middle of building an elecric bike.
Im using a 450W brushed DC motor, with 2x 12v 11amp batteries in series to give me 24 (the rated motor voltage, but may up the current if all ok)
Tried it through a relay and 30Amp fuse, but blows it unless on a rolling start.
So i need a controller (that i can put a throttle to)
Can you advise a suitable controller for his setup (brushed motor).
Many thanks
Martin |
Admin (Admin)
Board Administrator
Username: Admin
Post Number: 807
Registered: 10-2004
|
| Posted on Tuesday, June 10, 2008 - 9:42 pm: |
|
Martin,
Your motor probably draws about 25A and I guess you don't need reverse so I would recommend the Uni 24V 40A part number 1514-424. It is also available boxed. Please use our quick search function in the shop to locate it. If you need further assistance, feel free to post here again. |
Martin flint (Martinmadeit)
Member
Username: Martinmadeit
Post Number: 2
Registered: 6-2008
|
| Posted on Wednesday, June 11, 2008 - 12:13 pm: |
|
thanks, just looking nowm, but i cant see a boxed version that's 40A, only the 80A which is more expensive.
I think i need this one but boxed: 4QD Uni Series 4 24V 40A - Part No: 1514-424
do you have the boxed part number please?
Martin |
Admin (Admin)
Board Administrator
Username: Admin
Post Number: 808
Registered: 10-2004
|
| Posted on Wednesday, June 11, 2008 - 9:14 pm: |
|
Martin,
Good point, however the box and chassis plate are available on their own, see part numbers 1514-900 & 1514-901. Assembly is simple enough though.
Regards
Paul |
Ianjohn (Ianjohn)
Member
Username: Ianjohn
Post Number: 1
Registered: 6-2008
|
| Posted on Thursday, June 19, 2008 - 12:35 pm: |
|
Dear Sir or madam
I am currently building an R2D2 and gathering together as many parts as possible. I am now getting my head around the control system which is hopefully where you could help.
i have the futaba 6ex 2.4ghz set 6 channel
my droid at the moment weighs 30kg. so with the other parts it will increase so im looking for speed controllers seen the sabretooth duel 25a motor controller would this be a good start ? and can it be pluged straight in to the reciever for running 2 chanel ie both forward or one forward one reverse?motors/drive systems for the two outer feet and and a seprate motor with controller for head rotation.
and power supplys ie batteries and cables at the best ratings for all componets
I don't want you to think you're wasting your time working out this quote. I'm happy to come and visit you once you confirm you can supply what I need.
I look forward to hearing from you.
Kind Regards,
ian havenhand |
Admin (Admin)
Board Administrator
Username: Admin
Post Number: 818
Registered: 10-2004
|
| Posted on Friday, June 20, 2008 - 3:43 pm: |
|
Ian,
We supply parts to a number of R2D2 builders. Before recommending a controller, what is the size of motors you are using?
There is a data sheet for each of the Dimension Engineering controllers which are worth a read first. The dual controllers require two Rx channels, you can use then in tank steer or with a mixer function. Previous customers have used an Electronize 2-channel RC relay for head control as variable speed was not needed.
Battery size depends on running time and load, once we have an estimate for these, we can recommend suitable batteries and cables.
Regards
Paul |
Mark Mellors (Mark_m)
Member
Username: Mark_m
Post Number: 3
Registered: 1-2008
|
| Posted on Monday, July 21, 2008 - 1:30 pm: |
|
Hi,
I want to make a jumbo servo using a drill motor. but I expect at some point the motor will get upgraded for something like 1470-032 (350W motor)
At the moment I'm considering between the Pololu SMC04 (1503-006) and a Sabertooth with a picaxe providing the feedback logic. I'm worried about either coping with the stall currents. Gearing should be such that the motor won't be overloaded and held at stall but as its a servo app. there will be lots of starting and stopping. I've also heard that picaxe's run a bit slow to provide fast enough feedback.
The only other out of the box solution I can find are the Roboteqs but they seem a bit big.
My priorities are: reliability, ease of use, size/weight, cost.
Are there any other options available and what would you recommend?
cheers
Mark |
Admin (Admin)
Board Administrator
Username: Admin
Post Number: 828
Registered: 10-2004
|
| Posted on Tuesday, July 22, 2008 - 9:52 pm: |
|
Hi Mark,
With effective heatsinking, the SMC04 should be fine, equally a PICAXE will also work. Yes, PICAXE can be relatively slow but if you are simply using it for closed loop control with a fairly simple algorithm for the feedback element, it should also be fine.
A Roboteq would be an excellent choice and smaller versions are available now but still a bit of an overkill.
Personally I would go the PICAXE / Sabretooth route. |
rob stapleton
Unregistered guest
|
| Posted on Wednesday, October 29, 2008 - 10:15 pm: |
|
hey there,i have a 1/8 4x4 rc truck which i plan to convert from nitro to electric.i have a 250w 24v 2500rpm unite motor from a elec scooter and plan to run it via two slim sla batts.my question is what speed controller is compatible to connect to my futaba 2ch rc set and will any gearing be required or is motor suitable for direct drive via shaft. thanks for your time |
Admin (Admin)
Board Administrator
Username: Admin
Post Number: 910
Registered: 10-2004
|
| Posted on Sunday, November 2, 2008 - 7:54 pm: |
|
Rob,
I would recommend the Dimension Engineering Syren 25 - part number 1506-002. The motor as you mentioned spins at 2500 rpm, assuming their is no reduction in the differential, then the drive wheels will also spin at 2500 rpm. If I guess at a wheel diameter of 75mm, the truck speed will be 22 mph. Use our robot speed calculator to enter your own figures in to see if you need any gearing. |
Robert Whitworth
Unregistered guest
|
| Posted on Thursday, November 6, 2008 - 3:15 pm: |
|
Please could you help with a motor controller for a 24v dc 12amp permanant magnet motor. It needs to be able to cope with a stall. I need full speed forward and reverse with 2 wire control, one for each direction. These will supply pwm at 5 volts. The motor drives a hydraulic pump which is controlled by an autopilot and therefore it can oscillate between forward and reverse for sometime. |
Admin (Admin)
Board Administrator
Username: Admin
Post Number: 916
Registered: 10-2004
|
| Posted on Monday, November 10, 2008 - 6:48 pm: |
|
Robert,
How long do you wish the controller to be able to provide stall current for?
Do you need to be able to vary the motor speed?
Can you explain you interface requirements, you mention two wire control - one for each direction. From this I take it you do not need to vary speed, just direction but you will need a common wire as well. You lost me when you mentioned pwm, what are you intending to use the pwm signals for?
I'm sure we have something in our range but I just need to better understand your exact requirements. |
Herman v/d Meijs (Herman02)
Member
Username: Herman02
Post Number: 1
Registered: 12-2008
|
| Posted on Monday, December 8, 2008 - 11:50 pm: |
|
Hi, I am looking for a speed controller for the 24V 300W MY1016B3M3 motor. The motor torque is sometimes max for <1 sec, so the controller need to drive the stall current for a moment. I will start with a 12V supply, but if the performance lacks I switch over to a 24V battery.
The controller must have a full H-bridge. Is the Syren 25 a good choice. I looked at the 4QD Vortex controllers but I think they have only a half-bridge drive stage.
Regards,
Herman |
Admin (Admin)
Board Administrator
Username: Admin
Post Number: 934
Registered: 10-2004
|
| Posted on Tuesday, December 9, 2008 - 7:56 pm: |
|
Hello Herman,
On paper, the Syren 25 shold be fine but depending on the motor and the acceleration times, large bodied motors like the MY range can cause problems for the controller. Rapid deceleration times can cause large back emfs and relatively high currents that can pop a motor controller. Stalling a motor even for one second can cause large currents which could be as high as 70A for that MY motor. You state the controller must have a full H-bridge, the Vortex has a reversing realy and still performs well.
What is the application and that may give us some idea of whether to recommend the Syren or not? 12V will not be a problem by the way. |
Herman v/d Meijs (Herman02)
Member
Username: Herman02
Post Number: 2
Registered: 12-2008
|
| Posted on Tuesday, December 9, 2008 - 8:35 pm: |
|
Hi,
My application is a 3 DOF - Motion Platform, I will need three motors to drive the platform. A dutch-guy designed and build such a platform before, you can see his ideas at simprojects.nl, look at Motion platform III. On that site there are also the platform drive calculations.
I searched many places to find a suitable and cheap motor with the same characteristics but couldn't find one. So I think the MY1016B3M3 is a reasonable alternative. I appreciate if you have suggestions for a better motor to do the job.
Specs of the original used (and perfect) motor:
Tn = 1.05 Nm
ki = 0.24 Nm/A
i = 4.4A
Ra = 3 ohm
N = 2100 rpm
ku = 26V/1000rpm
Vmax = 52V at 2100 rpm
stall current = 12.5 A
stall torque = 3 Nm
I cannot control the motor using a reversing relay because the motor continiously changes its direction. I think the full H bridge driver is therefore neccessary.
Regards,
Herman |
Admin (Admin)
Board Administrator
Username: Admin
Post Number: 939
Registered: 10-2004
|
| Posted on Wednesday, December 10, 2008 - 7:21 pm: |
|
Herman,
I agree, your application needs a far quicker response than relay reversing controllers can offer.
As you need such a quick response including rapid reversing, the controller should be sized to the motor stall current as that is what it will see during direction changes.
I'm afraid we have no more stocks of MY1016B3M3. The motor spec you listed is for a much higher rated voltage, of course that only means a higher running current (& stall current) for 24V motors. We do have other a couple of other 300W that may be of interest, what final rpm are you after or is it direct drive? |
Herman v/d Meijs (Herman02)
Member
Username: Herman02
Post Number: 3
Registered: 12-2008
|
| Posted on Wednesday, December 10, 2008 - 8:45 pm: |
|
Thats a pitty you don't have the MY1016B3M3 on stock. Is it on stock in the near future ? or can you deliver other MY1016B.. motors, there is a whole range I believe.
The application (motion platform) is direct drive, so the motor never spins up to higher rpms. It must only deliver real force at low rpm.
I did some calculations and feel that running the MY1016B3M3 on 12V battery gives a torque of appr 2Nm at 30A. I think that would be sufficient. Another way to get this torque is using the MY6812L running at 24V. But I see, also "currently unavailable" !!
Also important is the weight of the drive system including rotor. For a good accelleration (appr 0.5G) the weight needs to be low.
regards
Herman |
Admin (Admin)
Board Administrator
Username: Admin
Post Number: 941
Registered: 10-2004
|
| Posted on Friday, December 12, 2008 - 8:02 pm: |
|
Herman,
We did have 20 to 30 different models of Unite motors and geared motors but we have no new stocks expected due to excessive price hikes from the factory and now we have an additional 25% cost due to the drop in the pound against the dollar. A great shame as they were very cost effective motors.
If you are not running the motor at full speed then why not gear it down and get even greater torque although that could increase drag.
We are exploring other motor manufacturers from within Europe but no joy so far. |
