By continuing to use this site, you agree to our use of cookies. Find out more
Forum sponsored by:
Forum sponsored by Forum House Ad Zone

Electric motor test

All Topics | Latest Posts

Search for:  in Thread Title in  
Lee Rogers10/06/2022 11:43:20
avatar
176 forum posts

I have a Bosch pro table saw that won't run. It has all the soft start and overload electronics and a no volt switch that one expects to find on a modern motor.

The question is , if I bypass the switch and all the electronics and power it up directly should it run ? Will I damage it ?

Dave Halford10/06/2022 12:08:49
2102 forum posts
23 photos

Better to put a light bulb across the motor feed and see if it lights up when you switch on or buy a cheap multimeter.

Poke and hope with mains can be fun.

Mike Poole10/06/2022 12:32:39
avatar
Moderator
3383 forum posts
77 photos

If it has a brushed motor as some do then check the brushes are not worn and are free in the holder and contact the commutator. Bypassing the soft start and control gear should not be a problem but if you are not confident with mains power then seek assistance. The fuse may fail with the inrush current but is likely to survive. The startup will be quite brutal compared to the soft start so be prepared.

Mike

Emgee10/06/2022 14:25:14
2446 forum posts
291 photos

Lee

Check on the motor plate to confirm operating voltage and if AC or DC supply.
Makers spec gives power output as 1.8kW so a direct connection will result in a fair current surge on start-up if connected direct.

Emgee

Lee Rogers10/06/2022 18:12:38
avatar
176 forum posts

Many thanks to all . Now to get the pixies flashing and smoking.

Jon Lawes10/06/2022 20:02:22
avatar
1007 forum posts

Take the utmost care! We need all the members we can get!

noel shelley10/06/2022 20:23:06
1451 forum posts
23 photos

Very much depends on the type of motor, brush or induction and your knowledge. If it's induction then do not by pass the condensers, and fit some sort of switch. Good luck. Noel.

duncan webster11/06/2022 00:45:04
4128 forum posts
66 photos

I've never come across a soft start single phase squirrel cage motor. Connecting direct to the mains without a lot more information sounds risky to me

Michael Gilligan11/06/2022 05:49:58
avatar
20289 forum posts
1064 photos

Is this the machine ?

**LINK**

https://www.bosch-professional.com/gb/en/products/gtm-12-jl-0601B15071920

MichaelG.

.

Edit: __ If so, then it evidently has a brushed motor:

.
 

Edited By Michael Gilligan on 11/06/2022 05:59:33

Edited By Michael Gilligan on 11/06/2022 06:13:08

Michael Gilligan11/06/2022 06:22:58
avatar
20289 forum posts
1064 photos

PostScript

I didn’t understand a word he was saying … but this might be of interest:

**LINK**

https://youtu.be/B7WaWfkNKN0

MichaelG.

All Topics | Latest Posts

Please login to post a reply.

Magazine Locator

Want the latest issue of Model Engineer or Model Engineers' Workshop? Use our magazine locator links to find your nearest stockist!

Find Model Engineer & Model Engineers' Workshop

Sign up to our Newsletter

Sign up to our newsletter and get a free digital issue.

You can unsubscribe at anytime. View our privacy policy at www.mortons.co.uk/privacy

Latest Forum Posts
Support Our Partners
Eccentric Engineering
Dreweatts
cowells
Rapid RC
Eccentric July 5 2018
Subscription Offer

Latest "For Sale" Ads
Latest "Wanted" Ads
Get In Touch!

Do you want to contact the Model Engineer and Model Engineers' Workshop team?

You can contact us by phone, mail or email about the magazines including becoming a contributor, submitting reader's letters or making queries about articles. You can also get in touch about this website, advertising or other general issues.

Click THIS LINK for full contact details.

For subscription issues please see THIS LINK.

Digital Back Issues

Social Media online

'Like' us on Facebook
Follow us on Facebook

Follow us on Twitter
 Twitter Logo

Pin us on Pinterest

 

Donate

donate