[Mysty_FR]

Hi guys
I am Simon from France, I have bought a 1m20 by 2m50 router. I am not really happy with the quality of the machine and the stepper motors and I find them a bit "Light" for the jobs i take on. I was reading that stepper motors could loose there position and it is exactly what happened the other day!!

I would like to improve the quality of the machine, and I would like to start by replacing the motors by servos.
Could somebody tell me what type of motors I need. Is it hard to do?
Where can I buy a kit?
And if somebody has an experience of improving there machine please help
Thanks a lot

[Ajancnc]

A CNC router can have 2 to 5 axes and depending on your needs, you need to select a model that features as many axes as you need. Here are some of the tips that will help you buy a perfect CNC router for your business.
# Start online research
# Determine the production capacity
# Stay within your budget
# Durability matters
# Play with the software
Here you can find your answer https://www.modmypi.com/blog/whats-t...stepper-motors
visit AJAN CNC for more detials.

[Tkamsker]

Hi that is easy look at the existing steppers check the data sheet on them how much force in NM they can deliver. then see how heavy your machine is
so small router work with 1-2nm bigger machines 3nm an more
then choose package of controller and router you like. i did an retrofit of an 3ton cnc machine where the Servors are from the 90s i had to search long how to do it
thats just my 5 cents

[Mysty_FR]

Hi guys thanks for your answers, @Ajancnc i allready have a cnc, I have a cheap cnc (is is my first) but I sell high quality pieces so i need high precision.
Tkamsker, I have tried to get the iformation for my seller but he does not want to tell me more than "I can send you new motors if you like (strange...?)
On the motors I have no information. The machines weight is 1T700
The biggest problem I have is that they seem to stop and loose there position.

[Tkamsker]

I have Never Seen no Info on the Motors sometimes it is a number Code whatever you th Need somehow find Out the torque of existing Motor or guess by Weight of gantry and friction probably a Foto would help ,.


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[Mysty_FR]

Hi
I have looked for the motor type and here is what I have found; Type 86BYGF 450A / TDH N° 13 04 01
I have seached and withe the type N° nothing comes out bit with a Type 86BYGH I have found this:

(General technical parameters) hybrid stepper motors
Step Angle ----------------------------- 1.8 float 5%
Insulation resistance -------- 500V DC 100M Min
Dielectric Strength -------- 50Hz 1Minute 500V Min
Ambient temperature ----------- -20 ~ +50 Degrees Celsius
Temperature rise -------------------------- 80 Degrees Celsius Max.
Runout ------------------------------- 0.02mm Max.
Axial runout --------------------------------------- 0.1-0.3mm

86BYGH450A-06

Number of phases: phase 4

Current: 4A

Resistance: 0.62 Europe

Inductance: 3.5mH

Maximum static torque: 2.5(Kg.cm)

Moment of inertia: 2700(g.cm2)

Weight: 2.5KG

Body: 76mm

A shaft: 37mm
Has any body have an idea?

[Tkamsker]

I found an Konverter which says 0,3 nm Even my 3D Printer has more Force which Weight is your gantry ?


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[Mysty_FR]

I would etimate it at about 70kgs

[Tkamsker]

Hi
i used ST6018 – Schrittmotor - Nema 24 - Nanotec
in my Klippfeld Mill which has an heavy Z Axis
I have one Granitedevices Servo for a 5th axis project 3 Phase Brushless Servomotors | Granite Devices
if you mill wood and need the speed i would use an servo the VXD controller can run in dual mode probably you combine 2 controller where 1 is doing x y axis and one is doing your z axis or you use an Stepper if z axis is not need to be fast ,.. thats just my 5 cents

[Mysty_FR]

Hi
Thanks alot for your help I have heard alot about NEMA but the guys said that it would be alot better to us NEMA 42? It costs alot more but is it worth it?
I need speed and accuracy i work with wood MDF
Just to be sur that I am getting this right Wen I have "Holding Torque NM 3.54" is ti better to be high or low?

[Tkamsker]

Simply See the Speeds you Need calculate it in rpm on the servo/Stepper Look at the measured speedand Force in the link i sended if it fits Take a Stepper if i doesnt fit Take apropeate servo if gantry is verry Heavy and you are afraid that Maßes will lead to Lost steps get a servo ,..


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