Isel CPM 3020 - run with mach3?

[craynerd]

Thanks for the reply.

Can you confirm that you are talking about removing the board totally? There is actually plenty of space for mounting the stepper motors to the top of the case, would you just leave the board in situ and unplug the steppers (they are standard screw connectors anyway) and plug them into the new drivers or would you clean it out.

I did similar with my TEP machine some years ago but admit, I`d like to utilise the power supply in this machine. However, although I`m confident enough to attempt this adaption of the machine, I`m not sure I`m confident enough to remove the motherboard/drivers and keep the PSU intact. What's more is I don`t actually know if the board is part of the PSU. I know I could certainly tap into power points on the board and use them. (all this said it would look a cleaner job if the board was removed).

I know I need to get at the motors so I guess my next job is to open the machine more so I can see a motor. It`s a real shame as uncovering/exposing the motors looks a challenge!

You have mentioned two new stepper drivers - I`m in the UK and I know gecko G540 is expensive and difficult to purchase - I can only find USA suppliers for both. I have purchase 4.2A drivers from Arc Euro before they increased in price. Would you not recommend the cheaper Chinese equivalent drivers?

Also when I had the TEP I only used a parallel port. I know JAZZ mentioned motion control in a previous message - is motion control the way? It is at a large cost compared to the free parallel port!

Any suggestions as to a suitable BOB?

I`m dying to get this thing moving!

Chris

[JAZZCNC]

Chris I would remove the main board and replace with good quality Digital Drives. Don't be tempted to try doing this on the cheap it will only cost you more money in the end.
I would also buy individual drives rather than All-in-0ne board like G540 or MX4660. Not because they are not good but rather because they are not cheap for what you get.

Steppers are most likely re-usable but you will need details to know how to set new drives etc. ie: Amps also how many wires to detemine how can be wired.

If power supply may be re-uasable depending on it's output. If less than 36Vdc then I'd replace it.

The rest will be re-usable, ie: E-stop, switches etc.

Now regards the BOB and parallel port then it's mine field.!! . . Cheap nasty Bob's can send you bonkers at best of time, couple these toPc with ropey parallel port and you'll soon be smashing your head against wall in frustration.
So my suggestion is Don't do it. Buy Decent Ethernet based Motion control card and connect it to Good BOB.

Only Motion control cards I suggest are ESS or Cslabs IP-M. Now when it comes to BOB's then my first choice is not to use one at all, which I'll tell how in min, but if I have to then only one I'll use is from PMDX in states but it's expensive. If really have to then I'll use one from Cnc4you or Roy at DIYCNC. Don't entertain cheap nast ones off ebay.

Now my first choice for machine like this and by long way is the IP-M. This removes all the BOB issues because doesn't use one and comes with all connection terminals. It uses 24v I/O so is very noise immune. Comes with Spindle speed Controller built into it.
It's very high quality unit which is robust and very neat. Manufacturer and software Support is very good.

Now at first it may seem expensive but if compraed to ESS and High Spec BOB with Spindle Speed control then it's not, it's actually much cheaper.

You could go with buying the G540 or Mx4660 and fit ESS but this will still workout more money than doing it with separate Drives and IP-M and still would have lesser quality system.

[craynerd]

Ok, I've managed to uncover the motors



Motors are a Shinano SST58D 3830. 1.5v 4.4A

data sheet here http://shinano.com/motors/docs/SST58D.pdf

Anyone give me any hints on what this means - good or bad news? Please tell me I don't have t replace these!!

[Clive S]

They look OK to me. Can you find out what the secondary Voltage says on the transformer (or can you measure the DC Volts across the blue capacitor) in the power supply as Dean (Jazzcnc) has asked before

[craynerd]

Ahh across the blue capacitor, thank you! - it measures 24.5v .... Not the 36v suggested!

[Clive S]

Ahh across the blue capacitor, thank you! - it measures 24.5v .... Not the 36v suggested!

Ok then it looks like you will need to build a new power supply it basically consists of the transformer, Caps and a rectifier about £45-£50. What part of Manchester are you in?

[craynerd]

Ok then it looks like you will need to build a new power supply it basically consists of the transformer, Caps and a rectifier about £45-£50. What part of Manchester are you in?

Hi Clive , North Manchester near Bury

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[JAZZCNC]

Anyone give me any hints on what this means - good or bad news? Please tell me I don't have t replace these!!

Like clive says motors are fine and you will be better using a new PSU with more voltage. If tight on budget then Technicly don't need a new psu and the machine will work with 24v even with new drives but you'll get much better performance with more volts. Not changing would be like having a ferrari and never taking out of 2nd gear.!

[craynerd]

Like clive says motors are fine and you will be better using a new PSU with more voltage. If tight on budget then Technicly don't need a new psu and the machine will work with 24v even with new drives but you'll get much better performance with more volts. Not changing would be like having a ferrari and never taking out of 2nd gear.!

Jazz, now you have seen the motors, any suggestion as to the best value but quality drivers?

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[JAZZCNC]

Jazz, now you have seen the motors, any suggestion as to the best value but quality drivers?

Sent from my SM-G900F using Tapatalk

These will work nice for that small machine. http://www.ebay.co.uk/itm/Leadshine-...kAAOSwNSxVIEIl

Run them with between 44-48Vdc using an unregulated PSU. Either build one like clive says which is very easy and done exactly like what's inside the machine already just with larger transformer and capacitors. You will probably be able to re-use the bridge rectifier may even be able to re-use the Capacitor depending on it's size and just add another.? Thou for the cost you may be better just replacing.
WARNING### Capacitors can give you nasty shock when charged up so don't go fiddling unless your sure they are dischraged. Always check with a meter before touching across termianls.