Retrofitting a 1986 Maho MH400E

In my ladder file, when the motion.spindle.speed.out.abs goes 0 the gearbox does not disengage the back gear it just lets the gears engaged, and only stops the motor.
John

RotarySMP wrote:

On a gearbox machine, it would be best to simply display current gearbox speed, and leave it alone when the machine stops. So what we now need is a work around the default behavour.

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Just change the comp file so it ignores the 0 rpm speed, and make changes in the gears for a value of 1 rpm and higher.

Thanks for your inputs and patience Andy and John.
The MAHO E series has no VFD. The gearbox provides the speed, the motor is just a simple 3ph constant speed motor controlled by relays.

What you should so is have motion.spindle-on as in input to your comp, and then an output (gearchange.0.spindle-on) as an output.

So you mean, give the gearbox.comp final control of the spindle relays? Sergey and I were also approaching that solution.

The Linuxcnc behaviour of commanding speed zero when you actually want spindle stop seems like a kludge up of two independant functions.

We decided to parse S0 as gearbox neutral based on the assumptions:
1/ Stopping the spindle was independant of speed (that assumption hasn't aged well).
2/ MAHO's gearbox provides a neutral position.
3/ Setting neutral is a safety benefit when you install a non-rotating tool in the spindle, such as a touch probe.

Currently we parse S>0 as 80rpm. but S=0 as neutral.

If I dump the neutral control, Johns suggestion is also attractively simple.

Those are all good suggestions you have given. I'll go through them with Sergey.
Mark

I think the gcode to go to neutral is M40, I don’t know if linuxcnc has assignment to that mcode and how is possible to add that capability, but it will be the right way to go to neutral speed.
John

Have you posted the source to your gearbox.comp on github? It would be interesting for us to see where the solutions are similar and differ.

Regarding HALUI, I use gmoccapy, and also expected it to net into the halui pins, but Norbert has found a different solution to hook straight into linuxcnc without netting pins.
Mark

Also you can always just place a bouton in the spindle control window for neutral and one for the brake. And connect them with the comp file.
John

Hi, what do you guy’s thing, is it a good idea to put the vfd below the indramat. Or should I have to redo all the cabinet arrangement, rip off everything and wire everything from scratch with the idramat and vfd side by side.

The cooling unit is in the door in front of indramat and vfd