I've replaced the original Tormach coolant pump with a more powerful (1/6 HP) pump to give more flow with a dual nozzle setup. The new pump is plugged into the controlled pump power outlet on the bottom of the control cabinet.
M8 does not start the new pump, however. I can start it and stop it just fine manually.
Any idea what's going on? Some kind of current-limiting protection kicking in, maybe?
Yep, when the switch is in "Auto", there's no response. I have to turn it on by switching to "Manual."
First you should connect the pump up to an independent 120VAC source to see if your new pump works without the Tormach.
Next you should measure using a voltmeter the voltage on the switched coolant outlet under no load ( pump not plugged in). There should be a 120VAC present when M8 is used and manual coolant switch set in AUTO position or with the manual coolant switch in ON position if the Tormach coolant swiched outlet is working correctly. There might be a current limit problem when there was voltage present measured at the switched coolant outlet under no-load (pump not plugged in) and then no voltage or less than the 120VAC measured at the switched coolant outlet with pump plugged in (under load).
Last edited by Don Clement; 08-20-2010 at 03:32 PM.
Put it into auto mode and try typing Control + the C key on the keyboard. See if this works first
More like a larger tank !
I am pretty sure that the M8 command is handled by a relay on the main control board and the "Manual" switch handles it directly.
If M8 does not work ( and manual does ) you may have smoked the relay on the main control board. I would check with Tormach to confirm this. The board is not cheap. How are your surface mount soldering skills ?
The pump is popping the 1A fuse on the machine control board.
The relay is OK; I hear it clicking in/out on M8/M9.
I'll check with Tormach before I put in a beefier fuse. In the meantime, I'll continue to run the coolant manually-- no big deal, really.