Cruisers Forum
 


Join CruisersForum Today

Reply
 
Thread Tools Rate Thread Display Modes
Old 01-11-2012, 15:51   #1
Senior Cruiser
 
roverhi's Avatar

Cruisers Forum Supporter

Join Date: Aug 2005
Location: Kona, Hawaii, Carlsbad, CA
Boat: 1969 Pearson 35 #108 & 1976 Sabre 28
Posts: 6,006
Send a message via Yahoo to roverhi
two prong Bosche Saber saw no work on boat's inverter, why???

Installed new engine controls which required sawing a rectangular hole in the cockpit side. Plugged the Bosche saber saw two prong cord into the inverter but it wouldn't work. Not a hint of it motivating but a slight increase of rf noise in the am radio. Had to use an three prong oscillating saw to do the job.

Why wouldn't the Bosche saw work?? All other tools have worked and continue to work fine. Its a Xantrex 1800 watt modified sine wave, btw.
__________________

__________________
Peter O.
'Ae'a Pearson 35
roverhi is offline   Reply With Quote
Old 01-11-2012, 16:01   #2
Moderator Emeritus
 
David M's Avatar

Cruisers Forum Supporter

Join Date: Sep 2007
Location: San Francisco Bay
Boat: research vessel
Posts: 10,153
Re: two prong Bosche Saber saw no work on boat's inverter, why???

I think you may have answered it when you said you have a modified square wave inverter. Try plugging in to a true sine wave voltage source and see if it works. Some things just don't work as well or not at all with modified square waves. Some things in fact can be destroyed by modified square waves...I have destroyed a couple power adapters with one.

You may also not be getting the correct RMS voltage that is required.

I say modified square wave because that is what it is. You would never want to modify a sine wave only to wreck a perfectly good sine wave.
__________________

__________________
David

Life begins where land ends.
David M is offline   Reply With Quote
Old 01-11-2012, 16:11   #3
Senior Cruiser
 
delmarrey's Avatar

Cruisers Forum Supporter

Join Date: Mar 2003
Location: Now in Blaine, WA
Boat: Modified Choate 40
Posts: 10,702
Images: 122
Re: two prong Bosche Saber saw no work on boat's inverter, why???

Quote:
Originally Posted by David M View Post
I think you may have answered it when you said you have a modified square wave inverter. Try plugging in to a true sine wave voltage source and see if it works. Some things just don't work as well or not at all with modified square waves. Some things in fact can be destroyed by modified square waves...I have destroyed a couple power adapters with one.

I say modified square wave because that is what it is. You would never want to modify a sine wave only to wreck a perfectly good sine wave.
Ditto!
A lot of the modern power tools have electronic drivers it the works, which requires a true sine wave source. Especially if is a variable speed system, works on multiple voltages or has it's own internal charger.
__________________
Faithful are the Wounds of a Friend, but the Kisses of the Enemy are Deceitful! ........
A nation of sheep breeds a government of wolves!

Unprepared boaters, end up as floatsum!.......
delmarrey is offline   Reply With Quote
Old 01-11-2012, 16:24   #4
Senior Cruiser
 
roverhi's Avatar

Cruisers Forum Supporter

Join Date: Aug 2005
Location: Kona, Hawaii, Carlsbad, CA
Boat: 1969 Pearson 35 #108 & 1976 Sabre 28
Posts: 6,006
Send a message via Yahoo to roverhi
Re: two prong Bosche Saber saw no work on boat's inverter, why???

Boy that was a Freudian slip. It's a modified SINE wave inverter. The saber saw is a variable speed. Guess it's the electronics in the saw. Works on wall power but blindsided me on the inverter problem. I'll have to test all my corded tools to see what works. Anything else I need to worry about with this inverter?? Really need it as there is no electricity at the slip.

Dei, how's the forepeak coming along??
__________________
Peter O.
'Ae'a Pearson 35
roverhi is offline   Reply With Quote
Old 01-11-2012, 16:35   #5
Registered User
 
sabray's Avatar

Join Date: Aug 2008
Location: Wash DC
Boat: PETERSON 44
Posts: 3,169
One weird thing i found using an inverter some tools would not show a load to start the inverter. Used a vacuum to bump the inverter and the tool then worked?
I think i was trying to use a laminate trimmer at the time. Someone who knows how these things work may know why.
__________________
sabray is offline   Reply With Quote
Old 01-11-2012, 16:36   #6
Senior Cruiser
 
delmarrey's Avatar

Cruisers Forum Supporter

Join Date: Mar 2003
Location: Now in Blaine, WA
Boat: Modified Choate 40
Posts: 10,702
Images: 122
Thread drift for a moment

Quote:
Originally Posted by roverhi View Post
Del, how's the forepeak coming along??
I need to update the blog but it's getting close to finish. And I just installed a 2000 watt inverter (True sine) with another 1400A worth of batteries.
__________________
Faithful are the Wounds of a Friend, but the Kisses of the Enemy are Deceitful! ........
A nation of sheep breeds a government of wolves!

Unprepared boaters, end up as floatsum!.......
delmarrey is offline   Reply With Quote
Old 01-11-2012, 16:40   #7
Senior Cruiser
 
delmarrey's Avatar

Cruisers Forum Supporter

Join Date: Mar 2003
Location: Now in Blaine, WA
Boat: Modified Choate 40
Posts: 10,702
Images: 122
Re: two prong Bosche Saber saw no work on boat's inverter, why???

Quote:
Originally Posted by sabray View Post
One weird thing i found using an inverter some tools would not show a load to start the inverter. Used a vacuum to bump the inverter and the tool then worked?
I think i was trying to use a laminate trimmer at the time. Someone who knows how these things work may know why.
It probably acted a phase inverter like the one I have at home to run my 240V 3-phase mill off of a single phase system. By adding another motor it converted it to a true sine thru feed back. But just guessing!
__________________

__________________
Faithful are the Wounds of a Friend, but the Kisses of the Enemy are Deceitful! ........
A nation of sheep breeds a government of wolves!

Unprepared boaters, end up as floatsum!.......
delmarrey is offline   Reply With Quote
Reply

Tags
inverter

Thread Tools
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off




Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -7. The time now is 15:49.


Google+
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.