9x20 Lathe
Spindle Motor E-stop
Last updated on
Friday, December 14, 2018 03:27:19 PM
Mountain US Time Zone
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E-stop,
Switch Wiring,
Upgraded Lathe Control Group
WARNING: SHOCK HAZARD -
FIRST UNPLUG THE LATHE MOTOR FROM THE
110VAC OUTLET
It is good practice to activate the E-stop button while
setting up the lathe.
E-stop
An emergency stop button for the BD-920N Jet lathe. The housing was cut
at 38 deg from an aluminum enclosure.
Switch Wiring
The stop button interrupts the hot, 110VAC line-in (L1).
BD-920N manual
The two red switch wires pass through an insulating rubber grommet.
Though over-rated, the two
switches (STDP) were wired in parallel for redundancy & less current per
contact.
The back panel bracket extends down to allow
attachment to the lathe's
steel switch cover using two, 10-32 bolts screwed into tapped holes.
Upgraded Lathe Control Group
Red E-stop, ON/OFF (Inhibit), variable
speed potentiometer, & CCW/CW spindle rotation direction.
The E-stop cuts the 110VAC to the entire lathe but the spindle ON/OFF
circuit utilizes
dynamic
braking.
This is a good E-stop location for me as this is where I rest my left hand
to manipulate the controls.
I also feel that when one is working close to the lathe & the red button is
located at the front of the
machine, it will be harder to hit stop due to the crowding of one's arms &
torso in that area. It is easier
to extend an arm & swat a button down than to retract & push inward. These
are personal preferences.
Also see
the
E-stop for the Taig CNC
mill & the variable speed DC
spindle motor modifications.
E-stop, Switch Wiring, Upgraded Lathe Control Group
Click on linked thumbnails
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