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Wich stepper motor for MKS TMC2100?

Posted by renatortb 
Wich stepper motor for MKS TMC2100?
March 22, 2017 12:34PM
I´m trying to find a good stepper motor for my custom CoreXY, that have a print bed of 600x400x400mm (for print RC car bodies). At first, I intend to use in the XY axis the **MKS** TMC2100 (LINK), that has this setup:

The calculation method of driver current: i=Vref*1.9/2.5
Default Vref is 0.65v, Max 1.3V,Min 0.
Default Current is 0.5a, Max current is 1A.


I selected previously the 17HS8401 stepper motor (LINK) that has 1.8A, but i´m afraid that it´s not a good match, since that this article (LINK) tells to select a motor with a current rating no more than 20% higher than the recommended maximum stepper driver current. This gives that the stepper motor shoud have about 1.2A. I think this motor will be a good mach for the DRV8825, but not the MKS TMC2100, right?

I´m afraid that this drive has a very low amp limit for the size of my printer, because i think that i need to have a high torque motor (44Nm+?). So, can anyone recommend some good stepper motor for this driver? Or i shoud give up the MKS TMC2100 and use some other drive with more amp limit?

Thanks!


Building a custom coreXY based on BigXY Large Format CoreXY Printer, Vulcanus V2, Vulcanus MAX... ++Brazil++
Re: Wich stepper motor for MKS TMC2100?
March 23, 2017 12:52AM
I'm currently using 0.9° steppers rated 2.4A with the TMC drivers on my CoreXY (300x200 bed). It's not a perfect combination, but my hotend carrier and the Y-gantry are not too heavy. I would go for 0.9°/1.7A steppers and 24V!
12V is the bare minimum for TMCs.

For a 32bit controller with plugin drivers, the RAPS128 are hard to beat. You can also run them on 8bit controllers, but with limitted microstepping ( 1/64 max. )
Re: Wich stepper motor for MKS TMC2100?
March 24, 2017 11:18AM
Quote
o_lampe
I'm currently using 0.9° steppers rated 2.4A with the TMC drivers on my CoreXY (300x200 bed). It's not a perfect combination, but my hotend carrier and the Y-gantry are not too heavy. I would go for 0.9°/1.7A steppers and 24V!
12V is the bare minimum for TMCs.

For a 32bit controller with plugin drivers, the RAPS128 are hard to beat. You can also run them on 8bit controllers, but with limitted microstepping ( 1/64 max. )

Thank you for your reply.
I will stay with 8 bit for now, so i need to use a 1.8º stepper motor...
I found a better fit motor, this one LINK.
I think that this one is better to use with the MKS TMC2100, because it has 1.5A. It gives me (85%*1.5) 1.27A, wich is closer of the 1.2A that the stepper motor shoud have with the MKS TMC2100 (this article (LINK) tells to select a motor with a current rating no more than 20% higher than the recommended maximum stepper driver current. This gives that the stepper motor shoud have about 1.2A.) If i ran the motor with 0.8A, then i will be using about 54% of the motor amp limit, which is in the OK zone...
Any advice is very appreciated.
Re: Wich stepper motor for MKS TMC2100?
May 12, 2017 10:42AM
Sorry to bring up almost a dead thread, but why not a4988 since u using 8bit board?
Re: Wich stepper motor for MKS TMC2100?
May 13, 2017 09:37AM
Quote
clyevo
Sorry to bring up almost a dead thread, but why not a4988 since u using 8bit board?

Because the TMC2100 is smoother and produces less noise...
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