Author Topic: Motor controller  (Read 590 times)

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Offline BVHOG

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Motor controller
« on: February 02, 2018, 07:22:56 AM »
Hoping we have some electrical geniuses here. Looking to be able to vary the speed of my seat and guide machine for use with multi angle serdi type seat cutting. It presently has a 1hp 115 volt motor.  Right now I can turn machine as slow as 60 rpm and would like to be slower. Not sure what to buy and the local electrical supply is of no help.
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Offline HD Street Performance

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Re: Motor controller
« Reply #1 on: February 02, 2018, 07:25:12 AM »
Harbor Freight router control
https://www.harborfreight.com/router-speed-control-43060.html
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Offline Thermodyne

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Re: Motor controller
« Reply #2 on: February 02, 2018, 08:58:49 AM »
In my pops shop there was a speed reducer that was used for cutting seats, as opposed to grinding.  It just chucked up between the drive and the cutter.  If you left it be, the cutter was full speed.  If you grabbed the outside collar with your hand, it slowed to prolly 10-20% of drive speed.

Mostly is was used for knurling valve guides.

Offline K4FXD

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Re: Motor controller
« Reply #3 on: February 02, 2018, 09:44:21 AM »
That harbor freight thing won't work.

You need what is called a motor drive. Very expensive.

My only experiences were with 3 phase and I don't know if anyone makes them for 110 single phase
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Offline PC_Hater

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Re: Motor controller
« Reply #4 on: February 02, 2018, 10:05:10 AM »
That harbor freight thing won't work.

You need what is called a motor drive. Very expensive.

My only experiences were with 3 phase and I don't know if anyone makes them for 110 single phase
You can get them for 110V single-phase motors. Some hundreds of dollars and do make sure you buy from a company that understands exactly what you have and what you want to do.
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Offline Admiral Akbar

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Re: Motor controller
« Reply #5 on: February 02, 2018, 10:25:02 AM »
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Offline K4FXD

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Re: Motor controller
« Reply #6 on: February 02, 2018, 10:57:03 AM »
 :up:
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Offline BVHOG

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Re: Motor controller
« Reply #7 on: February 02, 2018, 11:10:40 AM »
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Offline HD Street Performance

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Re: Motor controller
« Reply #8 on: February 02, 2018, 11:31:03 AM »
I have used and set up drives but never for 110v1ph

Offline Jonny Cash

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Accurate information is expensive, rare and difficult to find!

Offline FSG

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Re: Motor controller
« Reply #10 on: February 02, 2018, 12:00:47 PM »
Something like this..

https://www.wolfautomation.com/products/ac-drives/1_hp-120v,_single_phase_only
Interesting but it is showing it as 3 phase output. :scratch:

correct, VFDs are ALL 3 phase output,  can you use a VFD on a single phase motor ........ NO

there are single phase VFDs made by .........  they are probably limited in HP rating

and to be honest considering the machine your running I'd be opting to change the electric motor to a 3 phase one and then go with an good VFD

more cost but a better option


 

Offline K4FXD

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Re: Motor controller
« Reply #11 on: February 02, 2018, 12:05:33 PM »
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Offline K4FXD

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Re: Motor controller
« Reply #12 on: February 02, 2018, 12:12:04 PM »
 :chop:
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Offline Ohio HD

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Re: Motor controller
« Reply #13 on: February 02, 2018, 12:18:23 PM »
I don't know what the HP requirements are of this application. But in the past for large equipment I've replaced AC motors with DC motors using a drive to control the speeds. That starts getting expensive though.
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Offline jsachs1

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Re: Motor controller
« Reply #14 on: February 02, 2018, 02:12:51 PM »
Be sure that your machine will have the proper amount of torque when running at the slower speed. You can't afford it to stall when you're making the multi angle cuts.
John

Offline K4FXD

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Re: Motor controller
« Reply #15 on: February 02, 2018, 02:19:38 PM »
Does your machine change speeds with belts and pulley's, or windings?

If the former it might be cheaper to put a larger pulley on the bit or a smaller one on the motor.
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Offline Rockout Rocker Products

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Re: Motor controller
« Reply #16 on: February 02, 2018, 03:05:51 PM »
Be sure that your machine will have the proper amount of torque when running at the slower speed. You can't afford it to stall when you're making the multi angle cuts.
John

 That's one big advantage of 3 ph and a VFD... the VFD will hold a constant speed under load, adjusting amperage as needed.

 This one for my surface grinder was about 100 bux, converts 220 1p to 220 3p... https://youtu.be/iMPHaRfJVck (The digital display does work, something about the camera makes all the digits appear to be lit up)
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Online PoorUB

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Re: Motor controller
« Reply #17 on: February 02, 2018, 05:56:15 PM »
I have delt with single phase speed controls in HVAC. IMO, speed controllers on single phase just raise cain with the motors and ruin them in short order. I would swap out the motor for 3 phase if possible and then buy a VFD to run that motor.
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Offline BVHOG

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Re: Motor controller
« Reply #18 on: February 02, 2018, 06:24:02 PM »
Contacted Wolf Automation today and came up with model 55AC10E to run the motor, very knowledgeable guys.  Like jsachs mentioned torque was one of my concerns but with the already super low gearing it shouldn't be a problem. As for motor longevity I could see that being an issue but the truth is it's a large amount of time setting up and a few seconds for the cut.  No 3 phase power here.   Thanks everyone!
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Offline FSG

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Re: Motor controller
« Reply #19 on: February 02, 2018, 07:03:29 PM »

Offline Admiral Akbar

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Re: Motor controller
« Reply #20 on: February 03, 2018, 08:24:13 AM »
Quote
Motors which may have their speed adjusted using a Triac
Control include Permanent Split Capacitor (PSC), Permanent
Split Phase (PSP), Shaded Pole and Universal. These are all
single phase motor types which Triac Controls might adjust
speed - these applications may still have limitations. It is not
likely a Triac Control will offer a wide range of speed
adjustment
- it likely will be in the top half of speed pot
adjustment. The user may need to turn the Triac Control
output up to get the motor moving before slowing down.
Because success is application dependent, it is wise to
sample a Triac Control fi rst to evaluate performance in the
particular application. Many customers do have success -
Dart sells many of these products every year in a wide
variety of applications.
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Offline HD Street Performance

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Re: Motor controller
« Reply #21 on: February 03, 2018, 08:35:14 AM »
A potentiometer right? This is not to be compared to a VFD
I would buy the Harbor Freight deal, it's the same design. For the intermittent work it will be fine. I have used them and they are surprisingly reliable.

Offline Admiral Akbar

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Re: Motor controller
« Reply #22 on: February 05, 2018, 10:22:00 AM »
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Offline TorQuePimp

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Re: Motor controller
« Reply #23 on: February 05, 2018, 06:42:33 PM »
I replaced the motor and installed a v drive on my Tobin arp machine

Worked as well as the sunnen that replaced it

Bought everything from automation direct

Other than making a bracket.....bolted right on.....lil wiring