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Difficult to say, depends on location, quantities and many other factors, but I would say below 200$.

Thank you, yrsiddhapura. I am only talking about in the machine context. When we think a CMM machine, what software controls it's motion, axises etc. Can we consider a CMM machine as very sensitive CNC machine which is controlled by LinuxCNC? They both have axes, they both can run with probes etc. I mean can we build a simple CMM machine with LinuxCNC. They both work with coordinate system in software.

Hello and thank you in advance. I don't currently have access to the machine, I'll try to get it this evening.

The axes fluctuate about 1 to 2 tenths.

I would say off the top of my head
P = 3.5
D=0
I=0
Bias =0
Deadband 0.001
FF0=0
FF1=0.1
FF2=0.01

Encoder scale should fit.

I tested it for a long time, there is no problem in its operation, only the location information comes to the gui a little late while it is working, but this is not a big problem. It can be used in this way.

Can you post your hal and ini files?

Are the encoders calibrated properly and the feedback position repeatable?

What size of oscillation do you get? (a halscope plot would be helpful here)

You also need to make sure that the 7I77 encoder inputs are jumpered for TTL mode.
For encoder 03, this means jumpers W18,W20,W22 must be in the left hand position.
(default is differential mode = right hand position)

Hello, I have converted a Maho MH-C 700 with Mesa 7i77. I installed an Indramat 3TRM2 as an axis amplifier. I tried to calibrate the axes and eliminate the FError according to all the instructions found on the internet. P up, down FF1 up down etc.
Without a travel command, the axis rotates and tries to reach the Pos.Cmd. Controls the servo motor and overdrives, then again in the other direction. Depending on the values ​​in the axis calibration, back and forth faster or slower.

Without the 7i77 connected, I calibrated the axes in the Indramat zero point, they stay exactly and don't run away.

Does anyone have an idea what could be the problem, what else can I measure? I've now spent several hours calibrating, unfortunately without any real success.

I am grateful for any help.
Hallo, ich habe eine Maho MH-C 700 umgerüstet mit Mesa 7i77. Als Achsverstärker habe ich einen Indramat 3TRM2 verbaut. Ich habe nach allen im Netz gefundenen Anleitungen versucht die Achsen zu kalibrieren und den FError zu beseitigen. P hoch, runter FF1 hoch runter usw.
Ohne einen Fahrbefehl dreht sich die Achse und versucht den Pos.Cmd zu erreichen. Steuert den Servomotor an und übersteuert, danach wieder in die andere Richtung. Je nach Werten in der Achs-Kalibrierung schneller oder langsamer hin und her.

Ohne angeschlossene 7i77 habe ich die Achsen im Indramat Nullpunkt abgeglichen, diese bleiben exakt stehen und laufen nicht weg.

Hat jemand eine Idee woran es liegen könnte, was kann ich noch messen? Ich hab mittlerweile mehrere Stunden mit der Kalibrierung verbracht, leider ohne richtigen Erfolg.

Ich bin für jede Hilfe dankbar.

cornholio
Got some T620 and T630 trailing around. Will give them I try omitting efi. Guess, I would have never come up with THIS idea So thanks a ton
greez
chris

My suggestion is to use m19

Use halmeter or halshow to check the encoder counts at the output of the Mesa driver.

hm2_7i77.0.encoder.03.counts is probably the pin to check.

I don't think that the PP can do it (not as a first step, anyway). It doesn't "know" that it is a repeated step (and even more so doesn't know that it _will_ be a repeated step)

You can increase the minimum segment length which will reduce the file size (and will also often improve the machine speed) and you should allow the PP to generate arcs, where that is a setting as that will both reduce file size and improve fidelity.

In theory an intermediate tool (even applied as an input filter to LinuxCNC) could reduce file size. But at that point it may be too late, what do you gain? You alread have the huge file on the system.

Spotting the repeats (especially repeats with an incrementing variable) would be a rather "entertaining" bit of code to write.

TTL should work with Mesa 7i77, so check the hal file and make sure Y axis is using encoder.03.
Also, just in case, encoder.03 is the 4'th encoder connector on Mesa, the enumeration starts from 00.

It might help to change to wayland or xorg in case you already did.

Most likely overclocking won't help much. If you're isolating 3 cores, you could try isolating 1 or 2 cores instead.

I'm retesting my 7i95t configuration now... and I see the error.

JT

That is odd for sure.

JT