Festool Owners Group

FESTOOL DISCUSSIONS => Ask Festool => Topic started by: Papalima on March 10, 2017, 03:34 PM

Title: Duty Cycle of CT36
Post by: Papalima on March 10, 2017, 03:34 PM
Hello,
  Can you tell me the duty Cycle of a CT36?  I would like to use it for my CNC and the jobs can run from 10min to hours.
Title: Re: Duty Cycle of CT36
Post by: Kev on March 10, 2017, 07:22 PM
My bigger concern would be the bag filling up ... the Festool DC's are designed for commercial use and very much targeted at sanding, so they'd be designed to bang on for hours at a time!
Title: Re: Duty Cycle of CT36
Post by: Papalima on March 10, 2017, 07:28 PM
My bigger concern would be the bag filling up ... the Festool DC's are designed for commercial use and very much targeted at sanding, so they'd be designed to bang on for hours at a time!

I do have a Cyclone hooked up to it so I have a much bigger bucket.  Very little actually gets in the bag.

I figured they were designed to run for a while but I didn't want to burn out my expensive CT.
Title: Re: Duty Cycle of CT36
Post by: kevinculle on March 10, 2017, 07:31 PM
I wouldn't worry about a continuous on duty cycle as I would imagine the worst case is a long session with frequent starts and stops.  For example when I have my CT26 hooked to the Dewalt biscuit joiner running a long series of joints the CT is being started, run up to speed and stopped on about a 20-30 second cycle.  I've done this for an extended period and the CT just keeps humming along.
Title: Re: Duty Cycle of CT36
Post by: rst on March 10, 2017, 07:50 PM
It is definetely easier on a motor to run constant rather than jogged on/off.  A dust extractor with a cyclone inline will more or less be idling as the filter is not reducing the air flow.
Title: Re: Duty Cycle of CT36
Post by: TylerC on March 11, 2017, 11:19 AM
Festool CTs are not continuous duty tools. They use universal motors which are better equipped for intermittent use. That said, some people do use it this way, but we do not necessarily recommend it.

It sounds like some other members have some useful experiences that might point you in the right direction.
Title: Re: Duty Cycle of CT36
Post by: Billy Bunter on March 11, 2017, 04:42 PM
I'd never heard of a universal motor so had to check Wikipedia....
"... A negative aspect is the maintenance and short life problems caused by the commutator, as well as electromagnetic interference (EMI) issues due to any sparking. Because of the relatively high maintenance commutator brushes, universal motors are best-suited for devices such as food mixers and power tools which are used only intermittently, and often have high starting-torque demands...."

Seems the main reason not to run such a motor continuously would be that they are not so efficient considering brush-wear....

learn something every day.....
Title: Re: Duty Cycle of CT36
Post by: antss on March 11, 2017, 04:48 PM
hmmmmm, brushless CTs in our future ?