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Coolant dribbles out after coolant shutoff
- Thread starter shane1109
- Start date
- Replies 14
- Views 386
plastikdreams
Diamond
- Joined
- May 31, 2011
- Location
- upstate nj
It's the lines draining, you could put a check valve in line.
Would you happen to know if that's a check valve on the pump?
Attachments
Would you prefer a longer delay on coolant start? There is usually a check at the pump to keep the lines from draining back, however draining back keeps it from dribbling out. Adding another check as close to the output might help as would considering a different hose routing that limits how much hose is above the output.
plastikdreams
Diamond
- Joined
- May 31, 2011
- Location
- upstate nj
That looks more like a strainer.
Larry Dickman
Titanium
- Joined
- Jan 30, 2014
- Location
- Temecula, Ca
sometimes this is real irritating. As a side job that I'm sure I'll never get to, I was wondering if a Tesla valve would solve the dribble
The issue is that it dumps coolant on the tool holder during a tool change. I'd like it to stop completely before changing tools.
plastikdreams
Diamond
- Joined
- May 31, 2011
- Location
- upstate nj
Program a dwell between shutting off the coolant and the tool change... if you do a check valve it's going to need to be close to the coolant manifold.
mhajicek
Titanium
- Joined
- May 11, 2017
- Location
- Minneapolis, MN, USA
If you have a check valve and it isn't working, open up the line and remove any chips. I found some stringy plastic chips in mine.
13engines
Stainless
- Joined
- Jun 30, 2015
- Location
- Saint Paul
That's a check valve at your pump. But put another as close to the coolant output as possible. Your problems will go away. Also like mhajicek said about cleaning. It's not uncommon for them to pick up a chip or two that keeps the check valve from fully closing.
If you happen to use Loc-Line type coolant nozzles, they have check valves that will fit right behind the tip.
If you happen to use Loc-Line type coolant nozzles, they have check valves that will fit right behind the tip.
Stirling
Hot Rolled
- Joined
- Dec 11, 2013
- Location
- Alberta canada
Out of curiosity. Why do you care if the taper gets coolant on it?
Owner believes it might cause tool holders to stick in the spindle.
Stirling
Hot Rolled
- Joined
- Dec 11, 2013
- Location
- Alberta canada
It can.. sort of..
So I use a extreme pressure lube on my holders.
Each morning I’ll put a very thin coating on a taper I know will see hard loading. Just one I find is enough.
Clean the spindle with a rag and go.
Bit if I keep getting coolant on tapers it washed this lubricant off. And I find I get more taper pop.
if I use through spindle coolant this washing effect is super fast.
Being that’s the case and tsc is common. Clearly is should be totally fine to get coolant on a taper right?
Lubing it is a crutch to a problem I’m clearly not addressing and coolant is not at fault…
Maybe we both just need regrinds.
Heat/cooling from long cycles increase the hard taper seating, but on mine I find hard loading it with a aggressive ramping cycle or a hard hsm type path will seat that taper in pretty hard too.
Peter from Holland
Diamond
- Joined
- Jan 15, 2005
- Location
- The Netherlands
I would try to remove that check valve at the pump
That way the lines get dumped as soon as the pump stops See how long it takes for the pump to fill the lines again and if that is acceptable
A low pressure bypass valve near the nozzle may work if the pump delivers some pressure
peter
That way the lines get dumped as soon as the pump stops See how long it takes for the pump to fill the lines again and if that is acceptable
A low pressure bypass valve near the nozzle may work if the pump delivers some pressure
peter
EmanuelGoldstein
Diamond
- Joined
- Apr 14, 2018
Usually we'd just go down to the clap clinic and get some pills ... fix ya right up in a week or so 
