Clippers wont come on

Hello, Albert -

Clarification: You are asking about an Oster brand Fast-Feed hair clipper. Apparently when you use it on hair cutting clients, the clipper "clips" their skin.

If I am correct in my guess, then . . .

I have found some reviews of the hair clippers which mention the clipper guard combs, which come with the clippers , which may cause problems.

These are links to 2 reviews:
https://www.myhairclippers.com/oster-fast-feed-adjustable-pivot-motor-clipper-review/
and
https://choicebarber.com/oster-fast-feed-review-2017/

The second review includes a recommendation to purchase other clipper guards to use instead of those which come with the hair clipper.

Some of the "clipping" problems may be user error (you), too. You may wish to find and watch some instructive videos. To find such videos, use your favorite search engine (Google, Bing, Yahoo Search, etc.) and the following search phrase, using quotation marks as shown:
"Oster fast feed" demonstration video

Best wishes.

try to use bare .032 wire and co2 shielded gas, If the equipment does not have a gas solenoid you may have to wire a solenoid to the trigger mechanism to get the gas to flow while the wire is feeding. The bare wire usually copper coated burns much hotter than the flux core when there is a gas shield. Also a .032 bare wire with a gas shield burns a a lower amp range and will get better penetration.

You may have to experiment with the feed rate and gas flow to get the correct setting, but the bare wire has a lot less resistance to current flow than the flux core and will burn a lot hotter when you use a gas shield.

At 115 vac there is not a lot of amperage left to create an arc and run the feeder and the rest of the unit , and the flux core wire takes a lot of amperage to burn both the wire and the flux . .

http://www.ebay.com/itm/Oster-Blade-Set-913-50-Fits-Fast-Feed-17-tooth-76913-506-New-/130803957423

Oil the blades and then adjust them. You will need to add oil while grooming from time to time and then clean & oil them again when finished.

The power screw is the correct way to adjust the problem you describe. If you have attempted to adjust it as instructed in the user manual and have not had satisfactory results, there may be a problem with the clippers.
Most Wahl clippers have a 1 year or longer warranty. You can call Wahl for warranty service at 1-800-334-4627

Is it tripping the breaker on your home's electrical panel? If this is the case, you need to know what that breaker is also feeding, how much amperage it can handle, and what the load demand is. Your washer needs 1700W which is around 15 Amps. If you're on a 15 Amp breaker that is already supplying power to something else, such as incandescent light bulbs, then you're going to trip the breaker each and every time. You'll want to plug it into a 20 Amp circuit that's being used by little to no other electrical devices. A quick alternative is to unplug or power off all other devices before using the washer... or plug it into the same outlet that you use your blow dryer.

You lost the plastic blade guard, order from supply company

You can call into 800-830-3678 and they will walk you through how to take care of this issue.

I found this site useful and complete with schematics and parts lists.

http://www.clipperrepair.com/inventory.htm

You can get a wide varity of oster clipper heads at Sally's Beauty Supply. I am not sure where you live but they are in most citys.