Machsupport Forum
General CNC Chat => Show"N"Tell ( Your Machines) => Topic started by: Hood on January 03, 2011, 02:59:26 PM
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I have seen requests from a few guys on the Yahoo group wanting to see pics of how a spindle speed sensor can be fitted to a Bridgeport with a QC spindle nose and decided to post here and link them to iit.
Here are a couple of pics of how I did it. I made the delrin part that holds the slotted wheel to fit into the top of the spindle then bored it and slotted so a bolt can pass through, I hexed the inside end, at the bottom, slightly smaller than the size of the nut then as I tightened the bolt the nut was pulled into the shaft and the delrin expanded slightly and gripped solidly inside the spindle.
Hood
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Hood, I've been following the yahoo posts regarding this feature. I also added proximity sensor to the top of my QC spindle on a series 1 BP mill and it works great.
Here is a question thou. I'm using VFD through Modbus and have pulley #1 set up for 500 - 5200 rpm with varispeed setting sitting at 3300rpm. This works great. The issue is when I switch to LO gear spindle pulley #2 (50-499rpm) the index becomes 1/9th of actual index. Mach just drives the motor at rpm of pulley 2 and uses "ratio" to display new rpm.
How do I set up Mach to drive motor 0 to 100% in LO gear instead of 0 to 10% ?
Thanks
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Afraid I dont know about modbus control but I suspect you will have to use your M3 macro to set it accordingly.
Hood