Advanced Search

My guess is there is an offset on the Y axis from a previous program or the program that called the subroutine.

Well I have been researching the scales. It appears these scales LS486 are incremental scales 1Vpp output with a separate  "R" output for reference position. It looks as though there is a reference pulse at each end 35mm from the full measuring length on one side and 70mm ish on the other, due to the reader position.

Someone here has already tackled these scales so i will post over on that thread and see how he went with them.  linuxcnc scales index ref marks
 
This is the pin out on the schematic. I also found a pdf of the specs so that has helped. Not sure these can be a hard limits but can be used to home to set zero. It couldn't be to hard to add some hard wired limit proximity switches in as a safety?

The pulse on these sine/cos scales ref mark looks like it is only 0.5V, I am sure one of the input IO mesa boards said that the digital inputs could be set to something like 8bits resolution? hope I have the terminology right. So I should be able to program that pin to look for a set voltage difference to indicate zero etc? have I got that correct?
 

Thats enough for one post. Cheers Str8

Hi Chris
How can I use your MESSAGE_TYPE = nonedialog in Gmoccapy 3.4.6? (LCNC 2.9.2, Debian 12)
Cheers
Wayne

Hi
I use 7i77 for feedback control with encoder motor signal succesfully
Now I try use feedback with linear scale for Y axis
I wiring  TTL signal from linear scale A signal, B signal to Encoder 03 slot (TB4 terminal)
I can open Gmoccapy but when JOG DRO of Y axis not change i think problem from linear scale

I have question ,TTL can work with 7i77 ?


 

So....
the machine is runnung linuxcnc 2.9.3 now. I use cutom tabs with probe basic.
and will tackle lubrication and toolchange next.

for lube any suggestion which component works best?
For my lathe I have one, but it kind of lubes to much. cause it runs every start and also the timer runs when idle. its only for the ways, so i didn't bother when there was to much oil.
On the Picomax I would prefer if the timer would keep its value even on restart and I need two instances one for the Spindle and one for the ways.
Is there a suitable component already done?

was unnecessary the timer is integrated in the bube pump by a mechanical reduction of the motor.

Thanks

No joy there, But it would not be hard to make a conversion plate to mount a 57mm/60mm servo or stepper if you did want to go with a Mesa solution.
You might be able to retain the stall homing if you write a custom homing module.

I got around to doing some videos on how my Maho works. Not quite the calibre of Mark's. But there may be stuff of interest to some of you. There is stuff about the switchgear, transformers, contactors, breakers, gear change, etc that will be common. Mine has some older stuff on it. There is also a run through some G-code in the older format that Heidenhain used. It's on my Google drive here:

drive.google.com/drive/folders/1NVXGKyaN...cWKjsMfe?usp=sharing

Cheers,
David

Not sure which version your image uses but there was a fix for this in gmoccapy that seems to have missed the release of 2.9.2:
github.com/LinuxCNC/linuxcnc/commit/760f...de07ea08b3f00b09b57f

There’s no extra holes, but I’m sure I could make nema 23 work.
Looks like I’d have to remove the whole z axis to remove the mounting plate, but I think a could just as easily make a template to drill/tap some accurate hole in situ.
I just measured, the holes are about 2” on center so they may land right where they’d interfere with nema 23 holes.
But I’m sure I could adapt it some how, or use nuts and bolt, or maybe even twist the hole pattern.
I’m fabricator so I can make most things work. I’d feel more comfortable making a z axis from scratch than I do controlling it

1. You are free to allocate either M21 or M22
linuxcnc.org/docs/devel/html/remap/remap...:unallocated-m-codes

2. The ngc file needs to have the same name as the subroutine it contains so you need to create separate files for M21 and M22 subroutines.

I believe there aren’t any limit switches. It uses stall force and ohmic sensing. I wouldn’t have a problem physically adding limit switches.Im not sure what the encoder looking thing on top of the motor is.Looks like there's brushes.Theres a chip and there’s a wire coming off that that goes to the nut? area for the ball screw.​​​​​​

Linuxcnc has buttons for GTK3 and PyQt5 that can be connected to [HALUI] MDI_COMMANDS in hal:
linuxcnc.org/docs/stable/html/gui/halui.html#_mdi_2
www.forum.linuxcnc.org/38-general-linuxc...halui-section#307456
For example panels see:
configs/sim/axis/gladevcp/
configs/sim/axis/qtvcp/
and others.

[edit]
If you are not using any of the above libraries you can also create hal pins through the python halmodule:
linuxcnc.org/docs/devel/html/hal/halmodule.html

How much are the parts for this board?

I saw they have io configuration software you can try www.odot.com.cn/upload/20240530/4fed8860...15e94cbc23e106fd.exe

If you remove the motor are there any spot drilled holes to mount a NEMA 23 motor?
The one I had had spot drilled holes for a stepper
If not, can you remove the top plate its mounted to and locate on the hole for the shaft so you can drill and tap stepper  mounting holes?