Emco PC120 Turn

[Chaz]

Interesting, no vault drop. The drives are actually 3M860.

I tried to set the current up - no change. Ive then ensure all the bits are well lubricated (the pump hasnt been run for a while), no real improvement.

Set the max speed down, seems OK at 700 although it should be able to do 2000 I think from the spec / manual.

Perhaps the lubrication is not getting to the dovetail / sliding area, difficult to get there without removing a lot of stuff. That said, it should be adjustable, will do some further research, perhaps the motors are stalling due to this.

[m_c]

I wonder if there's something else damaged. It's a bit suspicious that everything worked before on 24V, yet now it doesn't.

Without an oscilloscope, or swapping parts, it's all pretty much guesswork. The fact the relay board got damaged before, possibly suggests the BOB might also of been damaged, and is something that only shows up at higher step rates.

[Chaz]

I wonder if there's something else damaged. It's a bit suspicious that everything worked before on 24V, yet now it doesn't.

Without an oscilloscope, or swapping parts, it's all pretty much guesswork. The fact the relay board got damaged before, possibly suggests the BOB might also of been damaged, and is something that only shows up at higher step rates.

Perhaps however Ive since swapped it.

Im tempted to put in another PSU but not worth spending on. I seem recall that I was pretty much on max before. The motors look fairly old, I cant find a spec for them, perhaps something else that wasnt done correctly doing the retrofit.

[Chaz]

So, Berger Stepper motor.

4.4A, is that 50V DC?

[Chaz]

Found this - http://www.equitecnica.com.ar/files/...225212_8_9.pdf they only list 1 motor that does 4.4A, the torque matches. Max Supply Voltage is 92V according to this .... wonder if its correct. Might explain why the motor doesnt perform running 24 Volts.

[Chaz]

Noted that the drive can do a much better microstep rate. I wonder if the motor would support that and give me any better performance?

[Chaz]

Does anyone know if there are 'charge pumps' for sale as a standalone kit? I cant find any and dont want to buy a BOB with it for £80 if I can avoid it. I realise its a simple circuit but dont have the time to build something at this stage.