Thanks for elaborating. This gives us a much clearer picture of what you are working on.So,as you can see, it's a series of rollers, I need one powerful motor to run these roller in a series of forward reverse motions. This is to be in sequence with one or maybe two steppers to run a lead screw to push the finished product off the machine when it's finished. (Linear actuator like). Firstly a motor will feed the material ( 250mm wide sheetmetal ) into a guillotine 55 mm at a time, then the next motor will run another screw to pull the guilotine down. Next another motor will push the material into the rollers.
After the rolling has finished and the 80mm diameter 55mm high sheetmetal cylinder is finished, then a robotic arm will take the part and pack it.
Phew. Hope that makes sense,
Mark
Ps, cheers for the replies so far
All it is is a simple rainwater outlet , no variations, just stop,reverse, stop forward etc.Ah a rolling machine?
Like this retrofit project a while ago.
Do you intend varying the roll before or during the roll?
Max.
Aaaannnndddd! Milwaukee wins the torque test.Ok then, thanks for the explanation.
you're using a cordless drill now... according to this, average cordless drill torque is about 1,000 inch-pounds (83ft-lb/112Nm). That's actually a lot higher than I expected.
It's also a lot higher than probably a windshield motor or door lock motor, or anything readily obtainable (cheap) other than the cordless drill you're already using.
I don't know that you actually need that much torque. Does the drill seem quite labored when in use?
EDIT:
As I look online for gearmotors rated to 83 FT-fb, I find they are huge. For a while I wondered how the little drill can outperform these huge motors. I think its because the torque ratings for off-the-shelf gearmotors are given at rated speed. Cordless drill torque is rated at stall. I don't know what that means, other than an off-the-shelf gearmotor is capable of much more torque than the label shows, if you load it all the way to stall; sorry I have no thumb rule to say how much more though
Understood. but in order to make a valid recommendation, need to know the required torque.Aaaannnndddd! Milwaukee wins the torque test.
I'm actually quite sure with the better efficiencies from prototype 2 the torque will be less by a significant margin. It's the motor types to buy and how to control them that I'm thinking about most. I imagine a circuit board like arduino with drivers on it. A laptop to programme the timing, direction and sequence.
Taking into account I have near to no experiance in this, I'm very sorry for the stupid questions.
According to the calculator, that's 29N-m, so anything other than a drill would need to meet that at least (at stall).Really, I just didn't know how accurately I could get a drill motor to behave is my main reason. I basically looked at my 3d printer and thought, that's accurate, I'll use big motors like that and arduino, try learn some coding, and cross my fingers.
I don't have a torque wrench but I did a test with a 300mm spanner on the shaft and it took 10 kg to do the difficult fold.
Do I need a separate driver for every motor? I do need accuracy and fine adjustment here. Silly question, does a motor at 60 RPM have the same torque as one going at 1000? Physics is very frustrating for me:-(According to the calculator, that's 29N-m, so anything other than a drill would need to meet that at least (at stall).
I don't know how accurately you need to control the drill (or whatever folding motor might be), but if the motor turns a screw to create linear motion to fold the sheet, then you could put a proximity switch to stop it at the proper spot, and that can be "reasonably" accurate. But if you really need precision here, then a servo or stepper is the answer. This stepper gearmotor would be the minimum you could get away with (requires a stepper driver, cannot be powered directly from Arduino)
For every motor that is a stepper motor or servo motor, yes. but stepper drivers are not expensive.Do I need a separate driver for every motor? I do need accuracy and fine adjustment here.
I'm not sure your question can be answered, worded as is.Silly question, does a motor at 60 RPM have the same torque as one going at 1000? Physics is very frustrating for me:-(
It's all helpful strantor, is that a plc? That's what I think I need, a plc that can drive 5 motors, in sequence, repeating every 5 seconds. I was looking at a nema 43 I think, it was 160$ not geared though. And another 4 23'sFor every motor that is a stepper motor or servo motor, yes. but stepper drivers are not expensive.
This one should work with the motor I linked to.
I'm not sure your question can be answered, worded as is.
If you mean does a single motor have the same torque at 60 and 1000 RPM, even then, hard to answer. Depends on why it's going 60rpm vs 1000rpm. Also depends on what kind of motor, and load.
Basically torque is caused by the load. It takes 30NM to bend your metal. a motor that can sustain 30NM at 1000rpm can do the same at 60 rpm.
Not really sure if that was helpful.
Very possible.Silly question, does a motor at 60 RPM have the same torque as one going at 1000?
PLC = Programmable Logic Controller.It's all helpful strantor, is that a plc? That's what I think I need, a plc that can drive 5 motors, in sequence, repeating every 5 seconds. I was looking at a nema 43 I think, it was 160$ not geared though. And another 4 23's
Do any smart relays have pulse/dir outputs for stepper/servo drives?There is also a smaller version for a project that does not require a full blown PLC and that is a Smart Relay, there are many Manuf., some are relabeled but all have similar approach.
One of the main strengths of PLC/S.R. is that the screen can display a relay schematic style display that can also indicate the present status of I/O and outputs etc.
Max.