What kind of motor should I use for lifting a heavy load?

I'm working on an automation application in which I need to control a lifting mechanism with heavy load (about 120 lbs).  I will be getting constant temperature readings and based on that data I can determine the rate of change of the temperature.  If the temperature rate is too fast then I need to be able to slow down the motor, if it is too slow then I need to speed it up.  I'm looking for some support with choosing the right motor and hardware so that I have full speed control, while still being able to lift this heavy load, hold the load in a certain position, and then raise the load back to its original position.  I was considering a stepper motor for this due to its ability to brake so the load can stabilize.  Is this the right call or should I use a continuous servo?  Where can I get such a stepper that can handle this type of load and has software that interfaces with LabVIEW?  Would I be safe getting low-cost hardware for this application?  Any guidance would be sincerely appreciated.  Thanks.

Thanks for your replies to this topic.  I just discovered the worm gear option yesterday while talking to a professor.  I think that is the route we are going to take because the DC motor won't be as expensive as a high-torque stepper or servo.  Also, I have three engineers that will be calculating the motor size based on gear reduction, spool size, cable length, and the load that we have to lift (which is about 120 lbs.).  If any of you would like to suggest a motor size, that would be great too.  I'm thinking something around 1HP should probably do it.  My goal is to stay cost-effective while making an easy apparatus.  I know that the worm gears may also be inefficient at times but it seems like the best solution for this application.  Not to mention it's not to hard for our mechanical engineers here to make the spool and bearings.  And I believe you can buy a DC motor that interfaces directly with a worm gear.  However, a follow up question is what computer hardware do I need to control the voltage of the motor so I have speed control?  Is this done through an RS232 board?  My output from the LabVIEW program will be voltages, from which device is that binary signal converted into physical voltage?  Thanks for your help so far.

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    Thanks for your replies to this topic.  I just discovered the worm gear option yesterday while talking to a professor.  I think that is the route we are going to take because the DC motor won't be as expensive as a high-torque stepper or servo.  Also, I have three engineers that will be calculating the motor size based on gear reduction, spool size, cable length, and the load that we have to lift (which is about 120 lbs.).  If any of you would like to suggest a motor size, that would be great too.  I'm thinking something around 1HP should probably do it.  My goal is to stay cost-effective while making an easy apparatus.  I know that the worm gears may also be inefficient at times but it seems like the best solution for this application.  Not to mention it's not to hard for our mechanical engineers here to make the spool and bearings.  And I believe you can buy a DC motor that interfaces directly with a worm gear.  However, a follow up question is what computer hardware do I need to control the voltage of the motor so I have speed control?  Is this done through an RS232 board?  My output from the LabVIEW program will be voltages, from which device is that binary signal converted into physical voltage?  Thanks for your help so far.

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