My latest aquisition : Genmitsu CNC 3018-Prover with extras

[Fish&Chip]

Hi,

Since my ropewalke machine purchased was closed by AliExpress, I decide to purchased a CNC router frome Sainsmart : Genmitsu 3018-Prover with extra collets, bits, otor and spoilboard.

I will start in the received packages order (prices in CAD and taxes included) :

1. Genmitsu CNC MDF Spoilboard (30 x 18 x 1,2 cm or 11-4/5 x 7 x 1/2 inches) with M6 Holes inserts. From Amazon.ca $41.94 CAD.
2. Genmitsu 2pcs T-Track Mini Hold down Clamp Kit (2.57 L x 0.79 W x 1.97 H inches). From Amazon.ca $31.09 CAD.
3. Genmitsu 30pcs PCB Drill bits set from 0.1 mm to 3.0 mm and 1/8 shank. From Amazon.ca $22.98 CAD.

I am really surprise by the quality of the pieces received. Bits and clamps are made in China, but provided (on the front box inscription) by Apex CE Specialists Limited based in Ireland. The drill bits wil be useful for ship modeling in drilling work and in facing sculpture ornementation (I hope so).

I found a lot of related stuff in the Sainsmart store and a lots of infos too. People claiming a lack of infos on Amazon are too lazy to make there work.

Here is some pictures. I will update this thread each time I will received stock. In route are : GS775M 20K spindle motor,Genmitsu router, collets, spiral end bits, ball nose bits, 2 flutes bits and carving bits set.

 

[Kurt Konrath]

I have a small pack of drill bits that looks similar to those, and use them by hand for drilling small holes.

 

[Fish&Chip]

Very good . It was my first reason to purchased it. Carving will be an extra if a succeed with the process understanding.

 

[Fish&Chip]

Update : motor received Friday. No special instruction for it in the box. On the Sainsmart web site I found ;

• I read somewhere that the speed should not be over 90 % the nominal speed. So this gives 18 000 RPM.
  • Spindle Motor: GS-775M
  • Pre-Installed Motor Noise Suppression board
  • Spindle RPM: 24V 20,000
  • High Speed – Low Noise
  • Double Ball Bearing Brush
  • CW/CCW Rotation
  • Collet Holer Installed Alread
• However, I have a doubt here. Should I be able to obtain 18K RPM without putting a 24 V 8-10 A to replace the stock 24V 5A. Sainsmart claim :

"What is happening is that the current being drawn when the spindle tries to go from 0 to 20,000 RPM is more than the 5A power supply that came with your CNC can provide for that moment of peak power draw.​

That being said, if you ease the spindle into the maximum RPM, everything works without issue. How we suggest you do this is by replacing your spindle speed command with a few extra lines of code which brings your spindle up to full speed over the course of a second. In order for this code below to work, make sure to set $30=10000 in your console. This sets the maximum spindle speed in your firmware."​

So S10000 M3 should be replaced with (it is suggest to use this even if we change the power supply to prevent the control burning) :​

​

S4000​

M3​

G4 P.25​

S6000​

M3​

G4 P.25​

S8000​

M3​

G4 P.25​

S10000​

M3​

​

In conclusion, I do not know if I will be able to set the proper 18K safe RPM. Suggestions are welcome.

Michel

 

[rawen]

You should use multimeters to measure real current at the motor and source.
Don't forget the motor protection circuit - three capacitors and an anti-parallel diode!

Radek

 

[Fish&Chip]

Thanks. I will try to figure out the serie's probe setup to take the measure when I received the remaining material. I am still explore the Facebook page dedicated to Genmitsu and waiting for Sainsmart answer about the subject..

 

[Fish&Chip]

I just saw a guy who add external controller to protect the main controller of the cnc unit. He pass by the laser output to the external ontroller to power up the motor at 20K rpm. For this, the unit used is a Cytron 20Amp Bi-Directional 6V-30V DC Motor Driver Speed Controller 60A Peak wich features :

• Bidirectional control for one brushed DC motor.
• Operating Voltage: DC 6V to 30V
• Maximum Motor Current: 20A continuous, 60A peak
• Buttons for quick testing.
• LEDs for motor output state.
• PWM and DIR inputs.
• Inputs compatible with 1.8V, 3.3V, 5V and 12V logic (Arduino, Raspberry Pi, PLC, etc).
• PWM frequency up to 20kHz (Output frequency is same as input frequency).
• Compatible with sign-magnitude and locked-antiphase PWM operation.
• Overcurrent protection with active current limiting.
• Temperature protection.
• Undervoltage shutdown.

This unit is not available on Amazon and backorder at robotshop. I am noobs in electronic, so if someone can propose a replacement I will be gratefull.

Michel​

 

[Fish&Chip]

After making verification again, the new Genmistu 3018-Prover is supposed to be delivered with the new 24v 8-10A. The external driver is on hold.

I received my others sets of bits. On Facebook, Graham Bland gived a tons of guide and tuto. Thanks to him. So I can show you the kind of infos availables, like the bits specifications.



And here is the pictures of the collets and bits received today.

1- 15 collects pack with the 1/8 in shank open. All are sealed in plastic bag and oiled.



2- The BN10 bits set : 2 flutes spiraled ball noses.



3- The four parts of the MC40a bits pack. First is the C08 part of it composed of flat end mill bits of varied size), followed respectively by : the 2 flutes titanium coated carving, milling and cutting bits, the ball nose followed by the flat end carving, milling and cutting bits.





4- Finally, the PD03a set of PCB drill bits showed previously in this thread.



Hoping that this thread could be informative enough for the newbies like me in the SOS forum.

Good afternoon.

Michel

 

[Kurt Konrath]

Well I am enjoying the information provided.

I am looking forward to seeing it all received and assembled to see how well it meets your needs and what total cost is for all items.

 

[Fish&Chip]

Thanks you Kurt.
Here is the update of the costs involved :

Prices in CAD and taxes + shipping included, not included are the duties surprises that can come from surfacing bit and may be the Genmistus 308-Prover purchased from Amazon :

1. Genmitsu CNC MDF Spoilboard (30 x 18 x 1,2 cm or 11-4/5 x 7 x 1/2 inches) with M6 Holes inserts. From Amazon.ca $41.94 CAD. Received.
2. Genmitsu 2pcs T-Track Mini Hold down Clamp Kit (2.57 L x 0.79 W x 1.97 H inches). From Amazon.ca $31.09 CAD. Received.
3. Genmitsu 30pcs PCB Drill bits set from 0.1 mm to 3.0 mm and 1/8 shank. From Amazon.ca $22.98 CAD. Received.
4. Genmitsu GS-775M 20000RPM 775 CNC Spindle Motor with ER11 Collet Set. From Amazon.ca $40.23 CAD. Received.
5. SainSmart Genmitsu CNC Router Machine 3018-PROVer with GRBL Offline Control, Limit Switches & Emergency-Stop, XYZ Working Area 300 x 180 x 45mm. From Amazon.ca $516.08 CAD. Too long waiting LOL! Not received yet.
6. MC40A, 1/8" Shank, CNC Cutter Milling Carving Bit Set, 40-PCS ; BN10A, 1/8'' Shank, 2-Flute, Ball Nose, Spiral End Mill, 0.8-2.5mm Cutting Diameter, 10 Pcs ; Genmitsu ER11 Precision Spring Collet Set - Canada / 15PCS. From Sainsmart (Canada Warehouse) $ 119.72 CAD (89 US). Received.
7. Spoilboard Surfacing Router Bit, 1/4 inch Shank Carbide Tipped Surface Planing Bottom Cleaning Cutter Slab Flattening Router Bit, Wood Milling Cutter Planer Woodworking Tool. Froma Amazon.ca $22.99 CAD. Not yet received.

The total investment is $795.03 CAD.

 

[Jack Sparrow]

Update : motor received Friday. No special instruction for it in the box. On the Sainsmart web site I found ;

• I read somewhere that the speed should not be over 90 % the nominal speed. So this gives 18 000 RPM.
  • Spindle Motor: GS-775M
  • Pre-Installed Motor Noise Suppression board
  • Spindle RPM: 24V 20,000
  • High Speed – Low Noise
  • Double Ball Bearing Brush
  • CW/CCW Rotation
  • Collet Holer Installed Alread
• However, I have a doubt here. Should I be able to obtain 18K RPM without putting a 24 V 8-10 A to replace the stock 24V 5A. Sainsmart claim :

"What is happening is that the current being drawn when the spindle tries to go from 0 to 20,000 RPM is more than the 5A power supply that came with your CNC can provide for that moment of peak power draw.​

That being said, if you ease the spindle into the maximum RPM, everything works without issue. How we suggest you do this is by replacing your spindle speed command with a few extra lines of code which brings your spindle up to full speed over the course of a second. In order for this code below to work, make sure to set $30=10000 in your console. This sets the maximum spindle speed in your firmware."​

So S10000 M3 should be replaced with (it is suggest to use this even if we change the power supply to prevent the control burning) :​

​

S4000​

M3​

G4 P.25​

S6000​

M3​

G4 P.25​

S8000​

M3​

G4 P.25​

S10000​

M3​

​

In conclusion, I do not know if I will be able to set the proper 18K safe RPM. Suggestions are welcome.

Michel

View attachment 279885

I have this spindle. I also purchased the upgraded power supply that genmitsu offers therefore I don't need to step up the rpm's like your GCode shows.

 

[Fish&Chip]

Thank you for this infos. What is your CNC version ? Did you upgrade the power supply for a 3018-Prover ? And if you allowed me with another question : How did you setup the S and $30 function (S18000 and $30 18000 ?)

 

[Jack Sparrow]

Thank you for this infos. What is your CNC version ? Did you upgrade the power supply for a 3018-Prover ? And if you allowed me with another question : How did you setup the S and $30 function (S18000 and $30 18000 ?)

I don't have a Prover, no. But the spindle works fine with the upgraded power supply. I am a little unclear on your second question. Let me review my notes and I'll get back to you as soon as possible

 

[Fish&Chip]

Thanks you so much. I am sure you will much clear than the instruction given on the web site.

After some reflection, may be your controller is more sturdy than the one supplied by Sainsmart. So no controller burning with the 20K spindle.

 

[Jack Sparrow]

I don't have a Prover, no. But the spindle works fine with the upgraded power supply. I am a little unclear on your second question. Let me review my notes and I'll get back to you as soon as possible

did you try to run the spindle at all? what did you get as a result? Do you have a tachometer to measure speed?

 

[Jack Sparrow]

Well, according to the website, and my notes, I didn't modify the settings that you referred to in your question because I purchased their upgraded power supply:

From Genmitsu website:
Upgraded Power Adapter: UL Approved and out-of-the-box support for the drop in 20,000rpm Spindle no need to modify G-code to ramp up to full speed and also supports the Genmitsu 3018 PRO Laser.


Also you can read the various articles on this link to get a better understanding on how to use the machine:

More Guides - SainSmart Resource Center

We advise users to find articles through the resource pages for each CNC. This section is for anything you are having trouble finding

docs.sainsmart.com

 

[Fish&Chip]

I do not have tacho. I did not try to spindle the motor yet because the CNC is not received. But, I have an electronic power supply than can regulate the Amps and Volts. May be should I try to make a circuit and make some trials. A curve with Volts (0 to 24V) and Amps in axis ?

Thanks also for the ressource center infos. I had mak the tour of it and have now a 2 inch binder of infos. Hoping now that Amazon.ca deliver really the new version of this CNC machine with the already upgraded power supply.

 

[Jack Sparrow]

I do not have tacho. I did not try to spindle the motor yet because the CNC is not received. But, I have an electronic power supply than can regulate the Amps and Volts. May be should I try to make a circuit and make some trials. A curve with Volts (0 to 24V) and Amps in axis ?

I would not play with a power supply other than what comes with the machine. But that is your call.

 

[Fish&Chip]

Well, you are surely more advised than me, i forget the electric protection inside the power supply dedicated to the cnc machine

 

[Fish&Chip]

I received answer from Sainsmart : "If you use the 3018 Prover, then you could set the $30=20000 directly. And there is no need for you to add another power supply."

After some reading I also found this :

PWM = ($30/SXXX) x 255.

The controller is a 8 bits one, so it produce 0-255 signal (256 step, 0 = idle). So the RPM is Volt related and proportional to the 0-255 signal. Putting $10000 ans S10000 gives the same result than $30 = 20000 and S = 20000 therefore. This is my understanding. So, if the motor is rating 24V 20000RPM, the 255 signal should delivered the rated speed.

Some people denied the useful use of the ABS cover cleaner shoe. Sometime it melt because the synthetic hair of the shoe do not travel well in Z axis in the material and stay in contact to the hot dust accumulated on surface. I explore the use of an air mist system to put inplace instead.