Chinese 6040 stepper drives

[Jed Clampit]

ok that makes sense John

now to the switches, i thought this might be easy but no lol

on the YOC335 i have

pulse/rev = 1600
decay mode = 0%
peak/rms = 3.5/1.8
switch 7 set to half current

so am i right in thinking the TB6560 should be set like this
sw1 = on
sw2 = off
sw3 = off
s1 = off
giving a working current of 1.6

s2 (stop current) i am unsure off

s3 = off
s4 = on
the above two switches are marked as excitation mode which i presume is the pulse/rev so i have it set to 16

s5 = off
s6 = off

[Jed Clampit]

having watched this video https://www.youtube.com/watch?v=KRoe4_XM884 i think my voltage should be set to maximum ie SW1,2 and 3 on and S1 off giving a current of 3amps ???

and after watching this video https://www.youtube.com/watch?v=Oy8vDJTGCY4 the S2 should be set to off as i don't want the motor to move

[john swift]

the motor current set by SW1,2 , 3 and S1 depend on your motor
the one in the youtube video may not be the same as yours

if it has a partnumber that enables you to download the motors data sheet
it will make it easy

without the information I would start at about 1.5 A

the YOC335 switch 7 set to half current = the TB6560 S2 (stop current) set to 50%

with a 200 step/rev motor
the YOC335 pulse/rev = 1600 gives you 1600/200 micro steps = 8

so you need to set the TB6560 switches S3 & S4 to 8 (both to 1)

John

[Jed Clampit]

i was going off the setting of the YOC335 Peak 3.5a and RMS 1.8a so i thought the peak would be the same.
i have had a look and there are no identifying information on the motors but in the info i received with the machine it say they are two phase 57/3 stepper motor. i presume that stands for series 57 and 3amp but the only info i can find says the revs are 600 for this motor, you might know better ?
now switch seven makes sense

[Jed Clampit]

OK i have finally got round to wiring everything up and it seems to work other than the fact that the motor sounds very rough and missing steps.
any ideas how to fix ?

[john swift]

Does the motor run OK when connected to one of the original drivers ?

without detailed information or boards to test
I can't be 100 % sure but one diagram for the TB6560 I have
shows the decay mode set to 100% not the 0% you posted

Another possible issue could be the acive high verses active low setting in mach3

without the circuit diagrams of the two boards I don't know if the step signal passes through to the TB6560 step pin unchanged or if it is being inverted

if the step pulse has been inverted the IC will see a very wide step pulse with a very narrow gap between pulses and as a result miss pulses
try changing the step pulse to active low to see what effect it has

the TB6560 steps on the positive transition of the step pulse as it goes from 0V to +5V

John

[Jed Clampit]

john your a star
i altered the decay mode to 100% and it made a vast improvement but it still wasn't right. i then went in to mach 3 and altered the active high verses active low setting and that worked a treat.
i went back to the decay mode and tried all the different settings but the best was the 100% setting.
i am busy with other stuff over the next day or two but as soon as i get a chance i will try it by cutting a job.
will this have an effect on the distance travel or will that side of things remain the same.

thank you for your help so far