Machsupport Forum

Mach Discussion => General Mach Discussion => Topic started by: milehigh51 on January 29, 2008, 05:00:19 AM

Title: Index pulse on bridgeport boss 4 seris 1 2hp verry head
Post by: milehigh51 on January 29, 2008, 05:00:19 AM
Anny one have suggestions on where to put a index pulse pick up?

Thanks
Roy
Title: Re: Index pulse on bridgeport boss 4 seris 1 2hp verry head
Post by: Hood on January 29, 2008, 05:23:59 AM
This is how I did mine, its not perfect as when in the low gear range its still reading the full spindle speed, however its near enough to 1:10 so I can still tell approx what the spindle speed is.
Hood

(http://mysite.wanadoo-members.co.uk/hoodsmachiningpages/BOSScomplete/SpeedSensor.jpg)
Title: Re: Index pulse on bridgeport boss 4 seris 1 2hp verry head
Post by: milehigh51 on January 29, 2008, 06:17:04 AM
Hood:

Thanks for the photo.  How are you fastening on to spindle or what ever?  That must be the top of the belt housing?

Thanks fore your help
Roy
Title: Re: Index pulse on bridgeport boss 4 seris 1 2hp verry head
Post by: Hood on January 29, 2008, 06:55:15 AM
All I did was make up a piece of of delrin to fit into the top of the spindle (actually its not the spindle but a shaft for supporting the pulleys I think) This piece had a hex milled in it to locate a nut then a slightly smaller hex below that, I then split it as you can see in the pic below. When the bolt is tightened it draws up into the Delrin and expands inside theĀ  hollow shaft.
Hood

Title: Re: Index pulse on bridgeport boss 4 seris 1 2hp verry head
Post by: milehigh51 on January 31, 2008, 07:02:33 AM
Thank You Hood  Most helpfull  ;D

Roy
Title: Re: Index pulse on bridgeport boss 4 seris 1 2hp verry head
Post by: Hood on January 31, 2008, 04:44:57 PM
No problem, as I said the only drawback is the low gear range still gets read as full speed range but its near enough 10:1 to just mentally knock the last digit off the end to get the speed.
Hood
Title: Re: Index pulse on bridgeport boss 4 seris 1 2hp verry head
Post by: vmax549 on February 03, 2008, 03:51:36 PM
HOOD did you sneak into my shop and look at my setup?(;-)

THe Bridgy reduction is 9:1 you CAN set up mach to display the correct rpm when in low range based on the spindle setup you and I have. ART added in the fix a while back, It works very well
Title: Re: Index pulse on bridgeport boss 4 seris 1 2hp verry head
Post by: Hood on February 03, 2008, 04:00:00 PM
You know what they say, great minds think.... oops thats not right, in my case its more like Fools seldom differ :D
Thanks, I will look into that although its near enough for me I suppose I might as well have it right :)
 Hood
Title: Re: Index pulse on bridgeport boss 4 seris 1 2hp verry head
Post by: vmax549 on February 03, 2008, 04:04:40 PM
If you need any assistance just drop me a line(;-)

Have you tried semi rigid tapping yet???  THat too works very very well with your/my/our setup(;-)

TP
Title: Re: Index pulse on bridgeport boss 4 seris 1 2hp verry head
Post by: Hood on February 03, 2008, 04:10:56 PM
I dont have my spindle controlled by Mach so dont think that will be an option for me. The Bridgeport will be going shortly anyway so I dont think I will ever have the spindle controlled by Mach.
  I am in the middle of a retrofit of a Beaver mill, quite a bit more rigid than the Bridgeport and the X travel is 32inch and Y 16 inch compared to the Bridgeports 18 and 12. It will be much more suited to the typed of work I do. Would like to keep  the Bridgeport but just dont have the room :(
Hood
Title: Re: Index pulse on bridgeport boss 4 seris 1 2hp verry head
Post by: vmax549 on February 03, 2008, 10:01:56 PM
If you want the spindle speed to read out correctly, set up the pulley settings for low range and on the far right side of the setup window set the ratio to 9. Then when you select low range by the pulley setting the DRO will aply the divisor and the sprindle speed will read correctly.

(;-) TP