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The DS group alarms are conditions the control detects by combining information from the CNC and from the drives, without belonging wholly to either side. They usually appear on functions that make the spindle and the axes work together: rigid tapping, orientation, synchronisation. The on-screen text is generic; the detail is on the diagnostic screen.
For reference only: alarms change with the manufacturer, the control and the machine PLC. Check the full code in the official manual before doing anything. Legal notice.
Always if it persists or appears with a clear secondary code.
Reset after removing an identifiable cause.
Choose the manual matching your control series, software version and machine builder. A support portal is a starting point; it does not establish applicability to every model.
There are machine functions where the spindle stops being a motor that turns and becomes another axis: in rigid tapping, the Z feed and the spindle rotation have to keep an exact relationship revolution by revolution; in orientation, the spindle has to stop at a specific angular position so the changer can work; in synchronised turning, two spindles have to rotate in phase. In all of those the control continuously watches that the relationship between commanded and actual stays within tolerance, and that supervision does not belong to a single device: it cross-checks data from the CNC, from the spindle drive and from the servo of the axis involved. The DS group alarms come out of that cross-check. The practical consequence is that the cause can be in any of the three places, and that the alarm number alone does not say which: you need the sub-code or the diagnostic detail. What can be anticipated is the type of cause. If the failing function is orientation, the first suspicion is the spindle feedback or its adjustment. If it is rigid tapping, the state of the tap, lubrication and the rigidity of the setup come into it too, because a tap that grabs breaks the synchronisation mechanically. And if it appears right at start-up without any special function having been requested, suspicion shifts to wiring and the drive.
In order, from the fastest and cheapest check to the most expensive.
01Note the full number and look for the detail in diagnostics
The visible number is only the heading. Look on the servo and spindle diagnostic screens for the associated detail; its location changes between series, so look it up in the control's maintenance manual. Without that detail, any conclusion is a guess.
02Identify which function it appears in
Rigid tapping, orientation for tool change, spindle synchronisation, gear change, or none in particular. This question narrows the problem more than any other, because each function uses a different set of signals and components.
03If it is in rigid tapping, look at the mechanical side first
Tap condition, type of tap holder, lubrication, correct pilot hole and a rigid setup. A worn tap or an undersized drilled hole generates torque that breaks the synchronisation. Confirm it by trying a new tap and checking the pilot hole diameter.
04If it is in orientation, watch the spindle's behaviour
See whether the spindle hunts for the position and never finds it, whether it oscillates around it, or whether it stops in different places each time. All of that points at the spindle feedback or its orientation adjustment, and it is valuable information for whoever repairs it.
05Check whether there are other associated alarms
If spindle or servo alarms with their own numbers appear alongside this one, those are the ones that matter: the DS group is usually the consequence of something already complaining elsewhere. Deal with the specific ones first.
06Test in air and under control
If it is safe, repeat the function with no material: orient several times, or run a tapping cycle in the air. If it always works in air, the problem appears under load and it is process or mechanics. If it also fails in air, it is the drive or the feedback, and it goes to maintenance.
Tapping torque above what the synchronisation tolerates: worn tap, tight pilot hole, insufficient lubrication or an unsuitable tap holder. Confirm it by trying a new tap and verifying the pilot diameter. It is fixed in the process.
Orientation: spindle feedback, orientation position adjustment or a changer sensor. Confirm it by watching whether the spindle finds the position or hunts for it endlessly. Maintenance diagnoses it with the alarm detail.
Wiring, drive or configuration, not process. It is confirmed because nothing has to be run to trigger it. It is a maintenance diagnosis, and it is worth checking whether there were recent interventions.
Life control on taps and use of the right tap holder for the kind of tapping the machine does. Pilot holes verified with the correct drill and lubricant specific to tapping. Spindle orientation checked inside periodic maintenance, especially if the changer starts playing up occasionally. Spindle wiring protected and inspected. And note which function it appears in every time it comes up: that log is what turns a generic alarm into a specific diagnosis.
Fanuc reports a DS category fault (integrated alarms that combine drive and CNC conditions). It is an alarm from the Spindle area, and in the catalog it is listed as “Integrated spindle/servo alarm (DS)”. On the machine you notice it like this: Spindle or axis does not enable, Specific DS alarm visible, May appear with secondary codes on servo/spindle display.
On the shop floor it almost always comes from one of these causes: Integrated drive fault, Encoder, Wiring, Mode/orient/rigid tapping change. Rule out the most likely one on your machine first, before touching parameters or swapping anything.
Reset after removing an identifiable cause. Resetting without fixing the cause first only hides the problem: DS0001 trips again and, in the meantime, you keep working with the machine in bad shape.
With the machine stopped and in a safe state, start with these checks: Write down complete DS number, Review axis/spindle diagnostic screen, Do not work on an energised drive. That alone will tell you whether it is the program or whether you need to raise a maintenance job.
With DS0001 active, avoid this: Do not bypass safety devices, Do not manipulate energized electrical cabinet, Do not continue producing if the alarm reappears. Skipping any of these points is what turns a minor stop into an expensive breakdown.
Always if it persists or appears with a clear secondary code. If you are not sure how far it goes, stop the machine and report it: a repeat alarm always works out cheaper than a crash.
It is critical: there is a real risk of damage to the machine, the tool or a person. Leave the machine stopped, do not keep resetting it to see if it goes away, and call maintenance before producing again. Guidance reference. Always confirm the full text in the exact machine/control manual.
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