Doosan DNM6700 TSC MALFUNCTION

Rex_Banner · Dec 19, 2022

Machine is about a year old, just doing short run parts. Now we are running a larger order of thousands of parts, and using through spindle coolant. 2 times now, TSC failed to come on, and the machine did not stop!! When it happens the light on the console will flash, and if I hit that button it will blow a bunch of air, and then trickle out, but it will stop after about 10 seconds. I have to power off the machine to get the coolant back on.

Shouldn't the machine stop when the TSC errors out?? I have seen the same thing on a Haas and it would stop.

It looks like there is a line filter in the tank, and I told the higher ups that it should be cleaned.

Has anyone else had this problem before??

Thank you for your time!!

LockNut · Dec 21, 2022

There might be a keep relay that turns on or off the TSC flow sensor. On our DNM5700 it is K11.4. Might be different on yours. Check the blue book that came with the machine. It should be kept in the door of the electrical cabinet.
This may also be caused by low coolant levels too.

Rex_Banner · Dec 21, 2022

Thanks for your input, as for the coolant flow issue, I discovered there is a valve on the bottom of the cyclone filter, and that valve needs to be closed, mine was open, and the pressure is now at 20 bar, but I'm still concerned about the machine not stopping if there is a TSC error.

I will check that relay you mentioned

Djstorm100 · Dec 21, 2022

my machine does it to. Will run without tsc even though its called

Rex_Banner · Dec 21, 2022

Yeah and that's scary!! I have seen a Haas stop dead if the TSC fails, I would think there is a parameter. I really hope!!

DouglasJRizzo · Dec 22, 2022

The DNM won't stop if the coolant flow isn't up to par.
As long as the controller gets the confirmation that the M8/M7 signal has been sent to the pump(s), that's it.
While you're at it, check the level as well as for clogged screens.

Djstorm100 · Dec 22, 2022

DouglasJRizzo said:
The DNM won't stop if the coolant flow isn't up to par.
As long as the controller gets the confirmation that the M8/M7 signal has been sent to the pump(s), that's it.
While you're at it, check the level as well as for clogged screens.

Sounds like a disaster waiting to happen though. At least on the haas it will alarm out because of pressure sensor not seeing TSC pressure.

LockNut · Dec 22, 2022

DouglasJRizzo said:
The DNM won't stop if the coolant flow isn't up to par.
As long as the controller gets the confirmation that the M8/M7 signal has been sent to the pump(s), that's it.
While you're at it, check the level as well as for clogged screens.

This is not the case. TSC has a flow sensor. It is really apparent when using tools with really small holes, you will get an alarm. This is why some people disable the flow sensor. There is also an M Code that will temporarily ignore the flow switch. M313 and M314 will turn off/on the flow sensor.

Blaser Swisslube · Dec 23, 2022

Rex_Banner said:
Machine is about a year old, just doing short run parts. Now we are running a larger order of thousands of parts, and using through spindle coolant. 2 times now, TSC failed to come on, and the machine did not stop!! When it happens the light on the console will flash, and if I hit that button it will blow a bunch of air, and then trickle out, but it will stop after about 10 seconds. I have to power off the machine to get the coolant back on.

Shouldn't the machine stop when the TSC errors out?? I have seen the same thing on a Haas and it would stop.

It looks like there is a line filter in the tank, and I told the higher ups that it should be cleaned.

Has anyone else had this problem before??

Thank you for your time!!

If you haven't already, try to check your pump screens...could be packed with small chips.

DouglasJRizzo · Dec 23, 2022

LockNut said:
This is not the case. TSC has a flow sensor. It is really apparent when using tools with really small holes, you will get an alarm. This is why some people disable the flow sensor. There is also an M Code that will temporarily ignore the flow switch. M313 and M314 will turn off/on the flow sensor.

Cool! Different than the one I was on, although that was a while ago and may have been altered.

DouglasJRizzo · Dec 23, 2022

Djstorm100 said:
Sounds like a disaster waiting to happen though. At least on the haas it will alarm out because of pressure sensor not seeing TSC pressure.

According to LockNut, there is a flow sensor, although some disable it. That may have been the case on the machine I was working on.

Djstorm100 · Dec 23, 2022

My AE at Ellison mention some time ago about adding a pressure sensor. Going by his remarks there is no pressure sensor though.

DouglasJRizzo · Jan 2, 2023

Djstorm100 said:
My AE at Ellison mention some time ago about adding a pressure sensor. Going by his remarks there is no pressure sensor though.

That was most likely the case with the machine I was on, some time ago.

LockNut · Jan 3, 2023

Djstorm100 said:
My AE at Ellison mention some time ago about adding a pressure sensor. Going by his remarks there is no pressure sensor though.

There is no "pressure" sensor. There is a flow sensor, as in GPM. It caused issues when using really small drills with really small coolant holes. It would trigger the flow sensor for lack of flow, based on the setting of the flow switch. There is an M Code for temporary ignoring of the switch. Most people did not know this so they disabled the flow sensor with the keep relay.

LockNut · Jan 3, 2023

DouglasJRizzo said:
Cool! Different than the one I was on, although that was a while ago and may have been altered.

Yeah Doug, a lot has happened since you were here.

Djstorm100 · Jan 3, 2023

LockNut said:
There is no "pressure" sensor. There is a flow sensor, as in GPM. It caused issues when using really small drills with really small coolant holes. It would trigger the flow sensor for lack of flow, based on the setting of the flow switch. There is an M Code for temporary ignoring of the switch. Most people did not know this so they disabled the flow sensor with the keep relay.

So machines have this keeper relay able or disabled now? How would I check?

LockNut · Jan 3, 2023

Djstorm100 said:
So machines have this keeper relay able or disabled now? How would I check?

Check in the Blue Book that came with the machine. It has all of the keep relays listed for that machine. It also has all of the parameters and such. This depends on the age of the machine too. Only in the last year or two did we start putting the flow sensors on ALL mills.

Search

Largest Manufacturing Technology Community on the Web

Search

Doosan DNM6700 TSC MALFUNCTION

Rex_Banner

Plastic

LockNut

Stainless

Rex_Banner

Plastic

Djstorm100

Cast Iron

Rex_Banner

Plastic

DouglasJRizzo

Titanium

Djstorm100

Cast Iron

LockNut

Stainless

Blaser Swisslube

Aluminum

DouglasJRizzo

Titanium

DouglasJRizzo

Titanium

Djstorm100

Cast Iron

DouglasJRizzo

Titanium

LockNut

Stainless

LockNut

Stainless

Djstorm100

Cast Iron

LockNut

Stainless

Similar threads