I plan on building a 2x72 belt grinder. I have a DC treadmill motor. What's the easiest way to wire and control the speed? Also if this motor doesn't work what kind of motor and controller do i need for a belt grinder? Thank you.
Reply:
Originally Posted by Need Advice
I plan on building a 2x72 belt grinder. I have a DC treadmill motor. What's the easiest way to wire and control the speed? Also if this motor doesn't work what kind of motor and controller do i need for a belt grinder? Thank you.
Reply:
Originally Posted by Lis2323
A few members have really nice build threads on WW with good info maybe do a search. Sent from my iPad using Tapatalk
Reply:Siemens 2HP 3 phase 3470 RPM sealed motor TECO 510E IP66 (dustproof rated) NEMA 4 vfd with speed control
Sent from my iPad using TapatalkLast edited by Lis2323; 4 Days Ago at 07:14 PM.:
Reply:
Originally Posted by Lis2323
Siemens 2HP 3 phase 3470 RPM sealed motor TECO 510E IP66 (sealed) NEMA 4 vfd with speed control
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Reply:
Originally Posted by Need Advice
. How much knowledge is needed to wire something like that? I'm looking for cheap and easy.
Reply:
Originally Posted by Lis2323
Pretty easy. Trust me. If I can do it you can
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Reply:VFDs have dropped in price tremendously in the past few years. I recently bought one with the same specs off eBay for under $300usdThe German motor and TECO vfd in the photos will probably be in the vicinity of usd$1000 . Using Made in China motors and eBay VFDs will be likely 60% cheaper. For speed control you can eliminate the VFD and use pulleys to save $Sent from my iPhone using Tapatalk:
Reply:
Originally Posted by Lis2323
VFDs have dropped in price tremendously in the past few years. I recently bought one with the same specs off eBay for under $300usdThe German motor and TECO vfd in the photos will probably be in the vicinity of usd$1000 . Using Made in China motors and eBay VFDs will be likely 60% cheaper. For speed control you can eliminate the VFD and use pulleys to save $Sent from my iPhone using Tapatalk
Reply:I need to run my 2.5 HP DC motor on AC current. What's the easiest way to do that? Also what's the easiest way to control the motor speed?
Reply:If you dont have the treadmills accompanying parts I would just watch for a free complete one. Before you do that I would investigate further as to the feasibility of your application first. Sent from my iPad using Tapatalk:
Reply:
Originally Posted by Lis2323
If you don’t have the treadmill’s accompanying parts I would just watch for a free complete one. Before you do that I would investigate further as to the feasibility of your application first. Sent from my iPad using Tapatalk
Reply:Lol, YT video's suck sometimes. I guess I can always use step pulleys on an AC motor instead.
Reply:My plan is to just use the treadmill controller. May use the incline system for belt tension - I don't know - haven't tore into it yet to see.
Reply:First you would need to know the voltage of the motor to find compatible speed control converter. The speed controllers must pulse the voltage for the speeds. Same voltage with pulse modulation. Some are not hugely expensive but thinking for a 2.5 hp it may cost a few bucks.Is there a spec plate on the motor. It is likely either 90 volt or at that HP it may be a 180 volt motor.Thinking the price on those will put the project over budget pretty fast. Guessing $300 to $600 for that size controller.Last edited by danielplace; 3 Days Ago at 09:52 AM.
Reply:
Originally Posted by danielplace
First you would need to know the voltage of the motor to find compatible speed control converter. The speed controllers must pulse the voltage for the speeds. Same voltage with pulse modulation. Some are not hugely expensive but thinking for a 2.5 hp it may cost a few bucks.Is there a spec plate on the motor. It is likely either 90 volt or at that HP it may be a 180 volt motor.Thinking the price on those will put the project over budget pretty fast. Guessing $300 to $600 for that size controller.
Reply:
Originally Posted by danielplace
First you would need to know the voltage of the motor to find compatible speed control converter. The speed controllers must pulse the voltage for the speeds. Same voltage with pulse modulation. Some are not hugely expensive but thinking for a 2.5 hp it may cost a few bucks.Is there a spec plate on the motor. It is likely either 90 volt or at that HP it may be a 180 volt motor.Thinking the price on those will put the project over budget pretty fast. Guessing $300 to $600 for that size controller.
Reply:
Originally Posted by Need Advice
I've seen people on YT use an AC motor controller and then send the current to a rectifier and then to the motor. If i use a DC motor controller does it have a built in rectifier or do i still need one of those as well?
Reply:
Originally Posted by danielplace
If it is setup for the incoming A/C voltage(120 volt) you have to feed it with then the output of controller should go right to the motor. How many wires come out of the motor. It may have a sensor that gives feedback to original controller so it can maintain rpm under different loads. You may be able to do without that as 2.5 hp will have plenty of torque if fed with proper controller that pulses the power to control the rpm. It maintains most of it's torque because the voltage isn't low it just isn't there 100% of the time. Small 90 volt DC output 120 volt input pulse modulated controllers are cheap but 2.5 you may have to spend a little. If you were electrically savvy and had a complete tread mill you could maybe be able setup the controller to work but it would still require very good electrical skills to make it ready to use as a control. So much of them is so integrated today that it may not be as easy as you would like. Maybe if you use the panel and wiring harness in it's entirety from the treadmill that would be doable.
Reply:
Originally Posted by Need Advice
There are 4 wires on the motor, a black, red and two blue wires that are for a overload protection sensor. I dont need the blue wires.
Reply:
Originally Posted by danielplace
This shows up to 2 hp if you power the drive with 240 with proper resistor and heatsink. Hard to find reasonably priced ones sized larger. Maybe it would do it. https://www.walkerindustrial.com/KBM...tent=KBMD-240DThey have a bunch. Maybe you can find what is needed there somewhere.https://www.walkerindustrial.com/AC-...Drives-s/2.htm
Reply:
Originally Posted by Need Advice
Thanks. If i used that motot control would i still need a rectifier?
Reply:
Originally Posted by danielplace
No these drives do all that. They take the 120 or 240 AC and output 90 VDC My mill runs a 90 volt DC motor with a drive like these. Not 2.5 hp though.
发表于 2021-9-23 23:27:01
