10mm belt nema23

[kev20009]

Hi looking for some advice, build a DIY laser cutter, as you now there in no load on the x axis, so they swing fast,

Using 10mm belt 20tooth pulley nema 23 189nm wired parallel giving 4.2 amps, now I've seen some lasers running 500mm second and looks very fast, mine can 800mm second but does not look fast,

Now I can only set steps to 3200 any lower stalls and can only move at about 4mm second, so would changing the motor to smaller nema23 say 2amps 4 wire be better, or should I wire these in series, I used these as they where for a cnc but never used them so were spares,

Thanks for any help guys. Kev

[paulus.v]

Why did you open a second thread with the same question?

If you want to get some feedback here, try to write/explain better and more detailed what you have.

What means 189nm? nm is the symbol for nanometre. You wanted to say Nm? Then I doubt there are 189...
What steps have you set to 3200? Are you talking about microstepping? Are you setting them in a drive unit? Has this drive unit a name/model number?
Your 800 mm/sec does not look fast... What software are you using? have you set the unit correctly? What is your acceleration?

You are asking about changing the motor but you did not tell us what drives you have (current and voltage ratings) and what is your supply voltage. Stepper torque at high rpm highly depends on the voltage and drive quality.

[kev20009]

Why did you open a second thread with the same question?

If you want to get some feedback here, try to write/explain better and more detailed what you have.

What means 189nm? nm is the symbol for nanometre. You wanted to say Nm? Then I doubt there are 189...
What steps have you set to 3200? Are you talking about microstepping? Are you setting them in a drive unit? Has this drive unit a name/model number?
Your 800 mm/sec does not look fast... What software are you using? have you set the unit correctly? What is your acceleration?

You are asking about changing the motor but you did not tell us what drives you have (current and voltage ratings) and what is your supply voltage. Stepper torque at high rpm highly depends on the voltage and drive quality.

Thanks for reply, sorry about 2 threads was not sure if first was sent,

Motor 2amp series 4amp parallel 1.89Nm holding torque,
Driver. M542t. 24 to 50vdc 1.5amp to 4.5amp
Awc608 control with laser cad software
36 Volt switching power supply running drivers,
24 Volt switching power supply running Awc608
3200 is micro stepping

First this software as calibration like mach3, cut square 100mmx100mm till your steps are right,
Cuts ok 4mm ply as 10mms is needed, but engraving uses faster speeds, and I notice 20 minute job is about 50 minutes

Thanks again for reply kev

[paulus.v]

What is the output power of your 36V PSU? How many motors and how long are they? Do you know their voltage and inductance?

I doubt that the steppers are the problem.
You have a 20 tooth pulley with 10 mm pitch? This means you are moving 200 mm with one motor rotation. At 800 mm/sec your motor has 240 RPM which isn't that high.

At high speeds acceleration is important. Unless you are cutting very large parts, you will hardly get to your max speed. Better the acceleration, quicker you'll finish the job with the same feedrate.

[kev20009]

What is the output power of your 36V PSU? How many motors and how long are they? Do you know their voltage and inductance?

I doubt that the steppers are the problem.
You have a 20 tooth pulley with 10 mm pitch? This means you are moving 200 mm with one motor rotation. At 800 mm/sec your motor has 240 RPM which isn't that high.

At high speeds acceleration is important. Unless you are cutting very large parts, you will hardly get to your max speed. Better the acceleration, quicker you'll finish the job with the same feedrate.

thanks for replying again, thought I put belt size, 10mm wide t5 belt so 5mm pitch

psu 36 volt, 300w, 9.5 amps
3 motors, only 2 for x and y axis, 3rd runs table up and down, Size 76mmx56mm


General specifications motors

Step Angle 1.8 Rated Voltage (V) 2.6
Temperature Rise (℃) 80 Max (Max 2 phase on) Rated Current in Sereis (A) 2.0
Ambient Temperature -20～+50 Rated Current in Parallel (A) 4.0
Number of Phase 4 Resistance Per Phase in Series(+/- 10%) 2.2 (Ohm)
Insulation Resistance (MΩ) 100 Min (500VDC) Resistance Per Phase in parallel(+/- 10%) 0.55 (Ohm)
Insulation Class Class B Inductance Per Phase in Series (+/- 20% mH) 7.16
Max.radial force (N) 28 (20mm from the flange) Inductance Per Phase in parallel (+/- 20% mH) 1.79
Max.axial force (N) 10 Unipolar Holding Torque (N.cm) 1.4
Rotor inertia (gcm2) 480 Bipolar Holding Torque (N.cm) 1.89
Mass (Kg) 1.0

hope this helps a little thanks again kev

[Robin Hewitt]

belt size, 10mm wide t5 belt so 5mm pitch

That's what I did, but it was wrong.
I bought T5 belt, tooth width 2.5mm
I bought T5 pulleys, tooth width 3mm
I stared at them in disbelief for 30 seconds then gave up an did something else. Couldn't believe it. What a rip.
If you have better luck let me know so I can resurrect it