Centroid Community CNC Support Forum

LMSCNC wrote: ↑Thu Apr 15, 2021 10:57 am Hi Marty,

I have those pictures on page 1 of this thread.

Thanks
Dave

Apologies.
I am helping a lot of people and can't keep track.

Look, you really want precision homing especially for X (spindle centerline).
You are direct driving your screws so you can't use the method I did on the PC5 lathes I did.
You can do with out and just take a skim cut on the part you are going to turn, measure it and enter that into CNC12. Works just as well.
You don't HAVE to have home switches, but sure is handy....
Since this is a basic hobby lathe, perhaps its best that you just get it going, learn how to use CNC12 lathe and then figure out how to add those features.
I trust by now you have downloaded the CNC12 Lathe Operator's Manual?
https://www.centroidcnc.com/centroid_di ... nuals.html

Marty

Hi Marty,

yes I have downloaded the manual but have not read much of it yet.

I would like to just get going on this but I still need to build the control box and am lost there.

I should have the Estop button and the encoder today. I just don't know what else I need for the control box.

~Dave

LMSCNC wrote: ↑Thu Apr 15, 2021 11:31 am Hi Marty,

yes I have downloaded the manual but have not read much of it yet.

I would like to just get going on this but I still need to build the control box and am lost there.

I should have the Estop button and the encoder today. I just don't know what else I need for the control box.

~Dave

Dave,
If you are going with Clearpath SDSK and CNC4PC C86ACCP, have you seen and downloaded this schematic?
Attached for reference. You could start with this. Then add to it. I recommend an Estop contactor. It would be controlled by Output 1 which would be assigned to NoFaultOut

You can also use the Acorn System schematic for some more ideas.

Do you have basic electrical/electronic skills and can understand the schematics OK?

Marty

Hi Marty,

If you are going with Clearpath SDSK and CNC4PC C86ACCP, have you seen and downloaded this schematic? yes

Do you have basic electrical/electronic skills and can understand the schematics OK? I have some electrical/electronic skills but I may have questions once I start on my control box.

I received my EStop button and the encoder but now I need to find a DB-9 connector as I just assumed it would come with one. where did you buy your DB-9 connector for the encoder?

I am slowly working on a bracket to mount the encoder to the lathe... I was thinking of somehow mounting a plastic gear the same size that's on the spindle to the encoder.

I would also like to move some controls from the lathe to the acorn board like the forward/reverse switch and the speed control... any suggestions there?

Thanks again.
Dave

LMSCNC wrote: ↑Tue Apr 20, 2021 8:54 am Hi Marty,

If you are going with Clearpath SDSK and CNC4PC C86ACCP, have you seen and downloaded this schematic? yes

Do you have basic electrical/electronic skills and can understand the schematics OK? I have some electrical/electronic skills but I may have questions once I start on my control box.

I received my EStop button and the encoder but now I need to find a DB-9 connector as I just assumed it would come with one. where did you buy your DB-9 connector for the encoder?

I am slowly working on a bracket to mount the encoder to the lathe... I was thinking of somehow mounting a plastic gear the same size that's on the spindle to the encoder.

I would also like to move some controls from the lathe to the acorn board like the forward/reverse switch and the speed control... any suggestions there?

Thanks again.
Dave

If you are not handy at soldering you might consider one of these:
DB9 Breakout Connector to Wiring Terminal RS232 D-SUB Male Serial Adapters Port Breakout Board Solder-Free Module with case( Female Serial Adapter)
by Copapa
Learn more:

DO note you have to solder the drain wire to the shell. I would tin each wire with a bit of solder to give them some mechanical strength before snugging them down in the terminal blocks.

If you think you can solder, then these:
You don't need 10 but they are cheap enough:
10Pcs DB9 Male Connector Kit Solder Type Plastic
by Oiyagai
Learn more:

You need to belt the encoder at 1:1 with timing pulleys and a belt. I would imagine plastic pulleys would work provided they are secure and don't slip. Personally I would go with aluminum and bore them out.

We don't know how your spindle motor, spindle drive works. You'll have to post pictures and describe what you have.
If you plan on trying your hand at threading, you are going to want good spindle control. You may have to change the motor out to a 3 phase motor and good VFD.

Marty

Hi Marty,

I pulled this information out of the manual for my lathe. I will post pictures later tonight or tomorrow.

500 Watt output spindle motor

The 500 Watt brushless spindle drive motor provides tremendous low-end torque. And you can vary the speed from 50 rpm to 2500 rpm continuously in both directions. There are no gears to shift.

Power requirements 120 V 60 Hz 8 Amps
Spindle motor output 0.67 hp (500 Watts)

Thanks
Dave

LMSCNC wrote: ↑Tue Apr 20, 2021 2:44 pm Hi Marty,

I pulled this information out of the manual for my lathe. I will post pictures later tonight or tomorrow.

500 Watt output spindle motor

The 500 Watt brushless spindle drive motor provides tremendous low-end torque. And you can vary the speed from 50 rpm to 2500 rpm continuously in both directions. There are no gears to shift.

Power requirements 120 V 60 Hz 8 Amps
Spindle motor output 0.67 hp (500 Watts)

Thanks
Dave

That's a bit of a sticky widget. Some users have had success with similar and some have not.
You will have to scan and post wiring diagrams/documentation here for suggestions.

Me, I'd tear it off and replace with an inverter duty three phase motor and a sensorless vector VFD.

You must be careful that you use a signal isolator for the existing brushless spindle drive or you may damage Acorn.

I have no direct experience with the brushless spindle drives. Hopefully someone else who has will chime in.

Marty

Hi Marty,

Can you point me in the right direction as to where i can get a inverter duty three phase motor and a sensorless vector VFD?

Thanks
Dave

LMSCNC wrote: ↑Tue Apr 20, 2021 3:01 pm Hi Marty,

Can you point me in the right direction as to where i can get a inverter duty three phase motor and a sensorless vector VFD?

Thanks
Dave

TVT America (you will have to figure out the size of the motor and the shaft size and which will work
http://www.tvtamerica.com/Metric-AC-Mot ... e-atex.htm

TDX200 (No Brake) or TDX400 (With Brake) series VFD from Factorymation.com:
Drives under 1hp can be driven by 120VAC single phase
https://www.factorymation.com/ac_drives_qs

GS20 series VFD from automationdirect.com:
https://tinyurl.com/3m7d3ww4

Are just some suggestions. You are advised to talk to the respective companies about your application.

If you take the time to post pictures and wiring diagram of your machine maybe others can help. Its been done before.
Marty

Hello All,

I was wondering if anyone can help me figure out if I am able to use the motor that can with the lathe or if I would need to buy a inverter duty three phase motor and a sensorless vector VFD.

here is the specs of my current motor..

500 Watt output spindle motor

The 500 Watt brushless spindle drive motor provides tremendous low-end torque. And you can vary the speed from 50 rpm to 2500 rpm continuously in both directions. There are no gears to shift.

Power requirements 120 V 60 Hz 8 Amps
Spindle motor output 0.67 hp (500 Watts)



Thanks
Dave